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Rational engineering of oxygen vacancy (VO) at atomic precision is the key to comprehensively understanding the oxygen chemistry of oxide materials for catalytic oxidations. Here, we demonstrate that VO can be spatially confined on the surface through a sophisticated surface hydrogen bond (HB) network. The HB network is constructed between a hydroxyl-rich BiOCl surface and polyprotic phosphoric acid, which remarkably decreases the formation energy of surface VO by selectively weakening the metal–oxygen bonds in a short range. Thus, surface-confined VO enables us to unambiguously distinguish the intrafacial and suprafacial oxygen species associated with NO oxidation in two classical catalytic systems. Unlike randomly distributed bulk VO that benefits the thermocatalytic NO oxidation and lattice O diffusion by the dominant intrafacial mechanism, surface VO is demonstrated to favor the photocatalytic NO oxidation through a suprafacial scheme by energetically activating surface O2, which should be attributed to the spatial confinement nature of surface VO.

A series of tuneable emission phosphors Ba2Ca1-xMx(PO4)2:Eu2+ (M = Mg, Sr, Mg–Sr, and Zn) was prepared using multi-cation substitution. A new mechanism of direct/indirect substitution of Eu2+ for a host containing more than one cation and a concept of “selective excitation” for a multiple luminescence centres are proposed that are of great significance for analysing the changes of spectra and for designing colour tuneable phosphors. The emission spectra show a red shift (479 → 602 nm) with colour tuning from blue to yellow in Ba2Ca1-xMgx(PO4)2:Eu2+ and a blue shift (485 → 441 nm) in Ba2Ca1-xSrx(PO4)2:Eu2+. For Ba2Ca1-xZnx(PO4)2:Eu2+, the emission peak first turns from 494 to 442 nm and then a red shift occurs from 442 to 585 nm when excited at 355 nm, while a continuous red shift was observed under excitation of 400 nm. Three different patterns (solid solution material, mixture transition state, and new host component) of phosphors were presented when many foreign cations were introduced into the original host. The energy transfer and thermal back-transfer over the barrier were demonstrated in as-prepared samples. Warm white light-emitting diodes (LEDs) with the International Commission on Illumination (CIE) chromaticity coordinates of (0.3622 and 0.3051), a colour rendering index (Ra) of 88.7, and a correlated colour temperature (CCT) of 3947 were realised using as-prepared phosphors. The as-developed compound series has the potential for further optimisation for commercial applications in daylight LEDs and warm white LEDs.

A series of Sm3+ ions doped Sr3Al2O6 phosphors was successfully synthesized via hydrothermal method. The crystal structure, morphology and luminescent properties of samples were analyzed by X-ray diffraction, scanning electron microscopy and photoluminescence spectra. All the samples took on cubic structure with Pa-3 space group. The Sr3Al2O6:Sm3+ phosphors could be excited by 405 nm and emit orange-red light peaked at 565, 609 and 660 nm. The effect of hydrothermal reaction time on the morphology and luminescent properties of phosphor was investigated. The influence of molar fraction of Sm3+ ions on the emission intensity of samples was studied and it has been found that the optimal dosage is 0.01. The calculated results by the first principle indicated that the Sm3+ ions will easily occupy the symmetric center site (Sr1). The results indicated that the luminescent intensity of Sr3Al2O6:Sm3+ phosphors could be modulated by reaction conditions of hydrothermal method.

Cubic phase Ca9-xAl6O18:xEu3+ red phosphors have been successfully fabricated using the hydrothermal assisted solid state method. The atomic site occupation of the matrix, morphology, luminescent properties, quenching mechanisms, and thermal stabilities are investigated. The possible sites of Eu3+ in a matrix crystal lattice are investigated via formation energy using first principle calculations. Under 395 nm excitation, Ca9-xAl6O18:xEu3+ shows a red emission at 618 and orange emission at 594 nm and the optimal Eu3+ ion concentration is x = 0.06. The effect of the reaction solution composition on the morphology and emission spectra are investigated using SEM and photoluminescence (PL) spectrum measurements. The results reflect that the samples have different morphologies in different reaction solutions. Additionally, the PL intensities of Ca8.94Al6O18:0.06Eu3+ decreased to 80.6% as the temperature increased from room temperature to 150 °C. Ca9Al6O18:Eu3+ phosphors may potentially be used for white LEDs.

Red-emitting Sr0.8Ca0.19AlSiN3:0.01Eu2+ phosphor with halide fluxes for use in the production of white light-emitting diodes (white LEDs) with high-colour rendering indices (CRIs) was prepared through the high-temperature solid-state method. Fluoride (NaF, SrF2, BaF2, CaF2, AlF3·3H2O and CeF3), chloride (NH4Cl, BaCl2, MgCl2, NaCl and LiCl) and composite fluxes (NaF + SrF2, SrF2+NH4Cl and NaF + NH4Cl) were applied in the phosphors. NaF, SrF2, NH4Cl and NaF + SrF2 fluxes had prominent effects on the characteristics of Sr0.8Ca0.19AlSiN3:0.01Eu2+ phosphors. Sr0.8Ca0.19AlSiN3:0.01Eu2+ phosphors with various powder morphologies can be obtained through the addition of fluxes, which are conducive for phosphor formation. The powder morphologies of phosphors incorporated with NaF + SrF2 were preferable to those of powders incorporated with other fluxes. This result indicated that the incorporation of NaF + SrF2 into Sr0.8Ca0.19AlSiN3:0.01Eu2+ yielded phosphors with high luminescent intensity and quantum efficiency, excellent thermal stability, narrow full widths at half-maximum (FWHM, 75.2 nm), uniform rod-like morphologies with large particle sizes (D50 = 16.99 μm) and good particle dispersion. White LEDs with high CRIs were obtained by combining prepared phosphors (NaF + SrF2 additive) with the commercial green-emitting phosphors Y3(Al,Ga)5O12:Ce3+ and (Sr,Ba)2SiO4:Eu2+. White LEDs with Y3(Al,Ga)5O12:Ce3+ and (Sr,Ba)2SiO4:Eu2+ phosphors had correlated colour temperatures (CCTs) of 3064 and 3023 K, respectively, and CRIs of 81.8 and 92.4, respectively. Therefore, NaF + SrF2 can be used as a favourable flux for the production of Sr0.8Ca0.19AlSiN3:0.01Eu2+.

Series of Cr3+ doped Mg3Ga2GeO8 magnesium gallogermanate near-infrared (NIR) materials were synthesized by solid state method. Mg3Ga2GeO8 with a spinel solid solution structure can provide three different sites for Cr3+, and the priority of Cr3+ entering the three sites has been clearly determined by analyzing the distortions of the three polyhedral sites and local crystal field strength. The emission of the phonon vibration line from the non-forbidden transition 2E→4A2 is observed at T = 10k in sub-peak 1, however, at room temperature, the spectrum presents a broad emission band 700–1200 nm superimposed on 2E→4A2 emission. When introduced In3+ into Mg3Ga2GeO8 to substitute for Ga3+, the emission intensity can be greatly enhanced and a red shift of emission spectra is observed, which may be ascribed to the crystal field environment getting weakened with increasing In3+. A novel NIR phosphor converted light emitting diode was fabricated by combining Mg3Ga1.87In0.1GeO8:0.03Cr3+ with 455 nm blue chip, of which an optical power is 6.143 mW, a photoelectric efficiency is 8.5%, importantly, the spectrum range of device covers 650–1200 nm with a full width at half maximum (FWHM) of 244 nm.

Series of NaBa0.97Ce0.03B9O15:xTb3+, ySm3+, zDy3+ are synthesized by the traditional high temperature solid-state method. Ce3+ is used as a sensitizer to improve the spectral properties of Tb3+, Sm3+ and Dy3+ by the way of energy transfer which is proved by the fluorescence decay curves. And the mechanisms of energy transfer from Ce3+ to Tb3+, Sm3+ and Dy3+ are all determined as dipole-dipole interaction. The color of NBB:3%Ce3+, xTb3+, 0.5%Sm3+ can shift from light violet thought white to yellow. And NBB:3%Ce3+, zDy3+ can give out white light and move to green field. Moreover, the thermal stability makes NBB:3%Ce3+, 0.2%Dy3+ be a potential candidate for the self-referencing luminescent thermometry.

A series of Sr0.8Ca0.2Al2Si2O8:Eu/Tb are synthesized, and the luminescence property and energy transfer of Eu2+, Tb3+, Eu3+ are explored. The results indicate that Sr0.8Ca0.2Al2Si2O8:Tb3+ presents the typical green emission, however, Eu2+ and Eu3+ coexist when Sr0.8Ca0.2Al2Si2O8:Eu is synthesized under air atmosphere. There is no the characteristic emission of Tb3+ in the emission spectra of Sr0.8Ca0.2Al2Si2O8:Eu, Tb synthesized in the atmosphere, but the emission spectra of Tb3+ appeared in the emission spectra of Sr0.8Ca0.2Al2Si2O8:Eu, Tb synthesized in the reducing condition. It may be deuced by the two forms of energy transfer: Eu2+→Tb3+ and Tb3+→Eu3+. And the energy transfer efficiency of Tb3+→Eu3+ is much greater than that of Eu2+→Tb3+. When Eu2+, Tb3+ and Eu3+ exist at the same time, there is the energy transfer of Eu2+→Tb3+→Eu3+. This result is of great significance for changing the luminescent properties of phosphors based on energy transfer.

Summary Background The survival benefit of early placement of transjugular intrahepatic portosystemic shunts (TIPS) in patients with cirrhosis and acute variceal bleeding is controversial. We aimed to assess whether early TIPS improves survival in patients with advanced cirrhosis and acute variceal bleeding. Methods We did an investigator-initiated, open-label, randomised controlled trial at an academic hospital in China. Consecutive patients with advanced cirrhosis (Child-Pugh class B or C) and acute variceal bleeding who had been treated with vasoactive drugs plus endoscopic therapy were randomly assigned (2:1) to receive either early TIPS (done within 72 h after initial endoscopy [early TIPS group]) or standard treatment (vasoactive drugs continued to day 5, followed by propranolol plus endoscopic band ligation for the prevention of rebleeding, with TIPS as rescue therapy when needed [control group]). Randomisation was done by web-based randomisation system using a Pocock and Simon's minimisation method with Child-Pugh class (B vs C) and presence or absence of active bleeding as adjustment factors. The primary outcome was transplantation-free survival, analysed in the intention-to-treat population, excluding individuals subsequently found to be ineligible for enrolment. This study is registered with ClinicalTrials.gov , number NCT01370161 , and is completed. Findings From June 26, 2011, to Sept 30, 2017, 373 patients were screened and 132 patients were randomly assigned to the early TIPS group (n=86) or to the control group (n=46). After exclusion of three individuals subsequently found to be ineligible for enrolment (two patients in the early TIPS group with non-cirrhotic portal hypertension or hepatocellular carcinoma, and one patient in the control group due to non-cirrhotic portal hypertension), 84 patients in the early TIPS group and 45 patients in the control group were included in the intention-to-treat population. 15 (18%) patients in the early TIPS group and 15 (33%) in the control group died; two (2%) patients in the early TIPS group and one (2%) in the control group underwent liver transplantation. Transplantation-free survival was higher in the early TIPS group than in the control group (hazard ratio 0·50, 95% CI 0·25–0·98; p=0·04). Transplantation-free survival at 6 weeks was 99% (95% CI 97–100) in the early TIPS group compared with 84% (75–96; absolute risk difference 15% [95% CI 5–48]; p=0·02) and at 1 year was 86% (79–94) in the early TIPS group versus 73% (62–88) in the control group (absolute risk difference 13% [95% CI 2–28]; p=0·046). There were no significant differences between the two groups in the incidence of hepatic hydrothorax (two [2%] of 84 patients in the early TIPS group vs one [2%] of 45 in the control group; p=0·96), spontaneous bacterial peritonitis (one [1%] vs three [7%]; p=0·12), hepatic encephalopathy (29 [35%] vs 16 [36%]; p=1·00), hepatorenal syndrome (four [5%] vs six [13%]; p=0·10), and hepatocellular carcinoma (four [5%] vs one [2%]; p=0·68). There was no significant difference in the number of patients who experienced other serious adverse events (ten [12%] vs 11 [24%]; p=0·07) or non-serious adverse events (21 [25%] vs 19 [42%]; p=0·05) between groups. Interpretation Early TIPS with covered stents improved transplantation-free survival in selected patients with advanced cirrhosis and acute variceal bleeding and should therefore be preferred to the current standard of care. Funding National Natural Science Foundation of China, National Key Technology R&D Program, Optimized Overall Project of Shaanxi Province, Boost Program of Xijing Hospital.

Series of color tunable Sr6Ca4(PO4)6F2:Ce3+, Mn2+ were achieved. In the way of energy transfer, the activator Mn2+ should get large energy from sensitizer Ce3+ and show high efficiency. However, with increasing Mn2+ concentration the emission intensity of Ce3+ decreases rapidly, the emission intensity of Mn2+ shows unapparent increase. It indicates that there are lots of energy losses in the process of energy transfer from Ce3+ to Mn2+. With the high concentration of Mn2+, the severe concentration quenching effect of Mn2+ occurs in Sr6Ca4(PO4)6F2:Ce3+, Mn2+. In order to reduce the energy loss owing to the concentration quenching effect, Mg2+ ions are introduced into Sr6Ca4(PO4)6F2:Ce3+, Mn2 to regulate the occupation of Mn2+. Consequently, the distance between Mn2+ increases and the energy loss between Mn2+ is effectively reduced. Therefore the emission intensity of Mn2+ increases greatly, and high energy transfer efficiency of Ce3+→Mn2+ is achieved.

Series of Ce3+/Eu2+, Ce3+/Mn2+ and Ce3+/Eu2+/Mn2+ doped Ba3Y(PO4)3 samples were synthesized by a high temperature solid state reaction method. Phase formation, energy transfer, luminescence properties and thermal quenching properties were investigated carefully. The energy transfer from Ce3+ to Eu2+ and Ce3+ to Mn2+ in Ba3Y(PO4)3 were verified and discussed detailed. When Ce3+ and Eu2+ are co-doped, the energy transfer process from Ce3+ to Eu2+ is confirmed with electric dipole-dipole interaction. For Ce3+/Mn2+ co-doped phosphors, the energy transfer process from Ce3+ to Mn2+ is proved with electric dipole-dipole interaction. Besides, due to the existence of defects, the phosphors show excellent thermal stability. For Ce3+/Eu2+/Mn2+ tri-doped Ba3Y(PO4)3, the energy transfer Ce3+→Eu2+ (Mn2+) and Eu2+→Mn2+ are confirmed. The energy transfer priority among Ce3+, Eu2+ and Mn2+ is analyzed in detail basing on the change of emission intensity. The obtained tri-doped phosphors contain red, green and blue component, thus they can emit warm white light basing on the energy transfer. The results show that they may be novel white-light-emitting phosphors for ultraviolet white light emitting diodes.

It is well-known that the thermal quenching (which is caused by non-radiative transition) damages the efficiencies of fluorescent lamps and LED lamps, especially for the high-power devices. Therefore, it is important to reduce the thermal quenching for improving the performance of illumination devices. In this work, Zn3(BO3)(PO4):Mn2+,Tb3+ is designed which appeared abnormal thermal quenching behavior. The phosphor does not exhibit thermal quenching even up to 200 °C (for emission of Mn2+) and 150 °C (for emission of Tb3+). The abnormal phenomenon is related to the shallow effects which are caused by the Mn2+ and Tb3+ doping in the host. Meanwhile, the thermal active phonon-assisted excitation also prevents the thermal quenching, which results in the broadening and blue-shift of the emission bands. Our result demonstrated that Zn3(BO3)(PO4):Mn2+, Tb3+ may be a potential candidate for the exploration of thermal stable materials.

A blue emitting phosphor Sr0.8Ca0.2-xAl2+ySi2-yO8:xCe3+ was synthesized by a high temperature solid state method, and its structure and the luminescence properties were studied in detail by the XRD, decay curves, emission, excitation and temperature spectra. We change the half-width of the emission spectrum to improve the color rendering of the device through matrix control. As a result, for Sr0.8Ca0.2Al2Si2O8:xCe3+, with the increase of Ce3+, there is a red-shift of 25 nm under the 330 nm excitation. With the addition of Al3+, the (Ca1/Sr1)O6 and (Ca2/Sr2)O7 polyhedron shrinks because the change of the adjacent (Al/Si)O4 polyhedron and the symmetry increases, which leads to the weakening of the crystal field splitting. The emission peak of Sr0.8Ca0.2-xAl2+ySi2-yO8:xCe3+ shows a blue-shift of 20 nm, the full widths at half maximum gets narrowed (FWHM = 54.3 nm) and color purity has increased, which is the result of comprehensive action of crystal field splitting and unit cell volume. Ce3+ in the material has a short lifetime (

Cation substitution was used as a method to discover new phosphor. Here, Eu2+ single doped single-phased warm white emitting phosphors Ca2BO3Cl:Eu2+, nM2+ (M = Sr and Ba) (CBL:Eu2+, M2+) were synthesized by controlling cations substitution systematically, and the crystal structure and luminescence property were analyzed. Ca2BO3Cl:Eu2+, nM2+ (M = Sr and Ba) exhibits a strong emission peak at 577 nm. With increase of cationic (Sr/Ba) concentration, the defect level occurs to move because of the crystal field of host changing, which causes the defect emission tuning from 428 to 401 nm. In this case, warm white light may be clearly generated by combining the blue emission (∼410 nm) and yellow emission (577 nm), which is observed for the first time in this kind of structure material.

Due to energy saving and flexible installation, the daylighting system via optical fibers for indoor illumination has attracted a lot of research attention. However, in applications, it is hard to adopt large aperture lens to improve sunlight collection due to the overheating problem caused by high sunlight concentration. The optical fibers generally adopted, Polymethylmethacrylate (PMMA) fiber, often suffers from overheating, and cannot work under a temperature exceeding 70 °C (Ashby, 2005). To solve this problem, this study tested three measures, infrared light filter (Sedki and Maaroufi, 2017), flux homogenization and fiber facet polishing, respectively to control thermal load caused by a large lens with a diameter of 1 m. The experimental data shows that the infrared light filter can reflect infrared light (740–1100 nm) efficiently, meanwhile keeping highly transparent for the visible spectrum (400–700 nm), which produces the cold incident light. A homogenizer was also designed to produce a uniform flux distribution by reflection in a mirror cavity. Analysis based on Monte Carlo rays-tracing method (MCRT) showed that the homogenizer could supply a flat flux distribution of 1500 suns by eliminating the flux peak. Microscopy experiments revealed that fine polish could effectively remove dust off the surface of the PMMA fiber, so to avoid heat spot to protect PMMA fiber. A long time daylighting test on Beijing (40°05′23″N, 116°17′45″E, 97 klux outdoor) demonstrated the feasibility of the large lens with an aperture of 1 m for daylighting via optical fibers, which offered an illumination level of 180 lx on an area of 36 m2. A comparison test on Lhasa, Tibet (29°39′52″N, 91°06′26″E) has also carried out under a higher outdoor illuminance of 125 klux, which showed a daylighting efficiency of 15.1%. The research showed that, as long as there was good thermal load control, PMMA optical fibers can work well and it is feasible to adopt large lens into daylighting system via plastic optical fibers.

A series of Ca2BO3Cl:Ce3+, Tb3+, Sm3+ are successfully synthesized by a high temperature solid state reaction. And the crystal structure, luminescence property and energy transfer mechanism of Ce3+/Sm3+, Tb3+/Sm3+ and Ce3+/Tb3+/Sm3+ in Ca2BO3Cl are investigated. There is an interesting phenomenon that the right side of the Ce3+ emission spectra in Ca2BO3Cl:Ce3+, Sm3+ compresses gradually with increasing the Sm3+ concentration. By means of refinement, it can be found that Sm3+ ions are mainly occupied in the Ca2 sites, because the cell of the Ca2 lattice is easily occupied. Then, the emission peak2 of Ce3+ in Ca2 sites occurs to blue shift. While the emission peak1 of Ce3+ in Ca1 sites is basically stability. However, the emission of Ce3+ in Ca2BO3Cl:Ce3+, Tb3+, Sm3+ have different changes with increasing the Sm3+ concentration that the emission peaks of Ce3+ shift to long wave at first then to short wave and the FWHM remains stability. This can be attributed to the existence of Tb3+. For the energy transfer mechanism, according to Dexter's energy transfer theory and Reisfeld's approximation, the energy transfer process of Ce3+/Sm3+ and Tb3+/Sm3+ should be the dipole-dipole interaction. And white emitting phosphor is achieved by the efficient energy transfer.

Series of (Zn, M)3(BO3)(PO4) (M = Ca, Mg):Ce3+ were synthesized by a high temperature solid state method, and the luminescence properties were investigated. Zn3(BO3)(PO4):Ce3+ presents two emission bands, which shows the different changing trends with increasing Ce3+ concentration. When introduced Mg2+ and Ca2+ into Zn3(BO3)(PO4), (Zn, M)3(BO3)(PO4) (M = Ca, Mg):Ce3+ also shows two emission bands because Ce3+ occupies three kinds of Zn sites and transits from 5d energy level to double ground state. Therefore, the two emission bands of Zn3(BO3)(PO4):Ce3+ should be assigned to the different occupancy sites of Ce3+. Moreover, the selective emission was realized and the emission intensity of Ce3+ was enhanced by the cationic substitution.

The development of electrical engineering and electronic, communications, smart power grid, and ultra-high voltage transmission technologies have driven the energy system revolution to the next generation: the energy internet. Progressive penetration of intermittent renewable energy sources into the energy system has led to unprecedented challenges to the currently wide use of coal-fired power generation technologies. Here, the applications and prospects of advanced coal-fired power generation technologies are analyzed. These technologies can be summarized into three categories: (1) large-scale and higher parameters coal-fired power generation technologies, including 620/650/700 °C ultra-supercritical thermal power and double reheat ultra-supercritical coal-fired power generation technologies; (2) system innovation and specific, high- efficiency thermal cycles, which consist of renewable energy-aided coal-fired power generation technologies, a supercritical CO2 Brayton cycle for coal-fired power plants, large-scale air-cooling coal-fired power plant technologies, and innovative layouts for waste heat utilization and enhanced energy cascade utilization; (3) coal-fired power generation combined with poly-generation technologies, which are represented by integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) technologies. Concerning the existing coal-fired power units, which are responsible for peak shaving, possible strategies for enhancing flexibility and operational stability are discussed. Furthermore, future trends for coal-fired power plants coupled with cyber-physical system (CPS) technologies are introduced. The development of advanced, coal-fired power generation technologies demonstrates the progress of science and is suitable for the sustainable development of human society. Keywords: Energy Internet, Coal-fired Power Generation, Flexibility, Cyber-physical system, Smart power plant

Luminescence mechanism of self-activated phosphor Ca0.75Sr0.2Mg1.05Si2O6 (CSMS) originating from oxygen vacancy defects has been deeply investigated by regulating synthesis temperature. The results demonstrate that the luminescence comes from three different oxygen defects in the crystal structure. For Ce3+ doped CSMS (ICSD#68180), two concentration quenching phenomena can be observed at x = 0.03 and 0.12 as the result of the formation of new substance CaMgSi2O6 (ICSD#17043), which leads to the actual concentration of Ce3+in CSMS (ICSD#68180) is far less than the doping concentration since part of Ce3+ ions enter CaMgSi2O6 (ICSD#17043). The emission spectra of CSMS:xCe3+ shifts from 388 nm to 405 nm with increasing Ce3+ content, which mainly should be due to the 5d energy center of Ce3+ shifting down and the crystal field split.

Here, using the safety raw materials Li3N, Sr3N2 and Eu2O3 instead of LiAlH4, SrH2 and EuF3 (besides AlN), the nitride phosphor SrLiAl3N4:Eu2+ (SLA:Eu2+) was synthesized in the glove box (O2

Li2ZnGe3O8:Cr3+ deep-red phosphor is synthesized, and the excitation spectrum ranges from 250 nm to 640 nm, and the emission peak locates at 713nm. In order to obtain NIR light, Mg2+/Ca2+/Sr2+/Ba2+ ions were introduced into Li2ZnGeO8:Cr3+. The emission spectra firstly show a blue shift and then present an obvious red shift by tuning the Zn/Mg ratio. A common effect between the crystal field splitting and the nephelauxetic effect makes it possible to blue shift, and the red shift is ascribed to the reduced site symmetry around some Cr3+ ions caused by the disorder. In addition, the emission spectra have a red shift when Zn2+ is substituted by Ca2+, Sr2+ or Ba2+, which is also a common effect between the crystal field splitting and the nephelauxetic effect. As a results, the luminescence materials realize the regulation from deep red to near-infrared light by increasing the doping ionic (Ca2+, Sr2+, and Ba2+) radii.

Series of Ca9-wCe0.5Y0.5-x-y-z(PO4)7:xTb3+, yEu3+, zSm3+, wMn2+ phosphors are synthesized by a high temperature solid state method. The spectral property and fluorescence decay curves are measured and used to demonstrate the energy transfer effect in Ce3+-Tb3+, Ce3+-Sm3+, Ce3+-Eu3+, Tb3+-Sm3+, Tb3+-Eu3+ and Tb3+-Mn2+. For Ca9Ce0.5Y0.5(PO4)7, the concentration of Ce3+ is higher and it can act as activator and sensitizer simultaneously. Ce3+ and Tb3+ can emit blue and green light under near ultraviolet excitation, respectively. Sm3+, Eu3+ and Mn2+ can produce red emission. In order to generate white light, Ce3+/Tb3+/Sm3+, Ce3+/Tb3+/Eu3+ and Ce3+/Tb3+/Mn2+ doped phosphors are investigated, and Ca8.8Ce0.5Y0.33(PO4)7:0.17Tb3+,0.20Mn2+ can create high quality white light. Its color rendering index can be high up to 80.2 and correlated color temperature is 4735 K, and its thermal stability is high. The result indicates that the acquired phosphors can be potential for the use of ultraviolet excited white light emitting diodes.

Solar aided coal-fired power generation (SAPG) has been attracted more and more attentions in recent years. However, its integration and optimization is a rather challenging work. Most of the studies are based on the researches of one or several certain schemes, and no general system integration optimization method (GIOM) considering all possibilities has been proposed. In this paper, a general system integration optimization model is developed, which is configured with 8 virtual molten salt heat exchangers (FHms) and used to simulate any scheme of different integration locations and heat distributions. A SAPG system based on Solar Two plant and a 600 MWe supercritical coal-fired plant is studied. The results show that at the relatively higher heliostat field power (HFP) work conditions, the heat energy should be injected into the highest pressure feedwater heater (FHs) as a priority. While at the relatively lower HFP and higher turbine power work conditions, the heat should be distributed to the two highest pressure FHs in a certain proportion instead of fully distributed to the highest pressure FHs. The performances of both the receiver and the power block are improved. The solar-electric conversion efficiency of SAPG system is obviously higher than that of Solar Two.

Lung adenocarcinoma (LUAD) is the most common malignant lung tumor. Metabolic pathway reprogramming is an important hallmark of physiologic changes in cancers. However, the mechanisms through which these metabolic genes and pathways function in LUAD as well as their prognostic values have not been fully established.Four publicly available datasets from GEO and TCGA were used to identify differentially expressed genes (DEGs) in LUAD, which were then subjected to GO and KEGG pathway enrichment analysis. Associations between metabolic gene expressions with overall survival, tumor stage, TP53 mutation status, and infiltrated immune cells were investigated. Protein-protein interactions were evaluated using GeneMANIA and Metascape.By integrating four public datasets, 247 DEGs were identified in LUAD. These DEGs were significantly enriched in regulation of chromosome segregation, centromeric region, and histone kinase activity GO terms, as well as in cell cycle, p53 signaling pathway, metabolic pathways, and other KEGG pathways. Elevated expressions of ten metabolic genes in LUAD were significantly associated with poor survival outcomes. These metabolic genes were highly expressed in more advanced tumor stage and TP53 mutated patients. Moreover, expression levels were significantly correlated with tumor-infiltrating immune cells. PPI interaction analysis revealed that the top 20 genes interacting with each metabolic gene were significantly enriched in DNA replication, response to radiation, and central carbon metabolism in cancer.This study elucidates on molecular changes in metabolic genes in LUAD, which may inform the development of genetically oriented diagnostic approaches and effective treatment options.

China is the main global garlic and rice producer and garlic–rice (GR) therefore represents an important crop planting system. However, the relationship between the agricultural output and greenhouse gas emissions under the GR system remains unknown. In this study, we analyzed the greenhouse gas emissions, crop yield, net economic benefits, and other potential influencing factors of the GR system, to explore the impact of different crop systems on food output and the environment. We used a wheat–rice (WR) system as the control and collected data for two years (2017–2018). Net economic benefits of the GR system were 28670.2 and 35799.8 CNY ha–1 in the two years, respectively, much higher than corresponding values of 2718.4 and 1825.6 CNY ha–1 for the WR system. Global warming potential was 78.43% and 168.66% higher for the GR system in the same years. Compared to the WR system, the global warming potential of the GR system was concentrated in the dry season, with the main contributor being N2O emissions (57.62%). Two-year greenhouse gas emission intensities calculated using net economic benefits (0.11 and 0.08) were less than one-fifth of those of the WR system. The GR system could therefore be an effective option for generating high net economic benefits with a low greenhouse gas emission intensity.

The design of user-level integrated energy systems is challenged by a variety of combinations of energy converters, complex cascade utilization of multiple energy flows, as well as sequential matching between stochastic energy resources and periodic energy demands. These issues can be addressed by an optimal energy-hub based planning framework considering the synergistic effects under multiple uncertainties. The energy hub model is extended to analyze energy-level matching and source–load balance with time-varying coupling factors representing part-load characteristics. The optimization problem is formulated as a bi-level planning model with uncertainties evaluated by a two-stage global sensitivity analysis. The bi-level planning model determines the system structure and component sizing at the upper level and identifies the optimal operation strategy at the lower level by employing piecewise linearization of part-load characteristics of components involved. The global sensitivity analysis reduces model size with the elementary effect method, identifies the most influential uncertain parameters with a variance-based method. A case study in Beijing is demonstrated for the proposed methodology. The results show that the proposed method can effectively plan the integrated energy system considering sequential source–load matching with the rational scheduling strategy of components. The demand-side response influences the system configuration and renewable energy penetration. Integrating the components’ part-load characteristics help avoid the mismatch between the component capacity and energy demand, reducing 6.8% cost compared to the scheme with constant energy efficiency. The three most influential factors identified among 551 uncertain parameters are natural gas price, valley electricity price and nominal efficiency of the gas turbine.

Large superheat degree of the steam bleeds from regenerative heaters as well as the large heat transfer temperature difference during the air preheating process is not thermodynamically satisfactory in advanced supercritical power plants with the aim of high power generation efficiency. In this study, an improved supercritical coal-fired power generation system, which integrates a supercritical CO2 (S-CO2) power cycle to utilize the superheat of the steam bleeds as well as to heat the combustion air, was proposed. In the proposed system, the heat transfer temperature difference within the steam regenerative trains and air preheating process could be reduced, leading to less exergy destructions. Moreover, less required heat for flue gas air heaters makes it possible to adopt a low-temperature economizer (LTE) between the arranged two-stage flue gas air heaters, saving part of the steam bleeds, even if the exhaust flue gas temperature is kept constant. The detailed exergy distributions within the regenerative heaters and air pre-heating process were discussed using the graphical exergy analysis. The mass and energy balance of the proposed system and the overall system performance were determined using the process simulation. The economic viability and the implementation feasibility of the proposed system was also analyzed. Results showed that the exergy destruction of the regenerative heaters and air preheating process could be reduced by 4.47 MW and 11.95 MW, respectively. The gross electric power output from the proposed system was 1007.79 MW with a satisfactory energy efficiency at 46.0%, 0.4 percentage point higher than the reference power plant. The payback period of the proposed system is slightly longer than that of the reference plant at the current market condition and it will be more profitable as the S-CO2 cycle becomes more commercially mature.

Solar aided coal-fired power system has been proven to be a promising way to utilise solar energy in large scale. In this paper, the performances of the solar tower aided coal-fired power (STACP) system at 100% load, 75% load, and 50% load for different days are investigated and the maximum solar power that the boiler can absorb under different plant loads are explored. Then, the effects of solar multiple (SM) and the thermal energy storage (TES) hour on the daily performance of STACP system are investigated. Results show that the maximum solar power that a 600 MWe boiler can absorb at 100% load, 75% load and 50% load are 76.4 MWth, 54.2 MWth and 23.0 MWth, respectively. Due to the augmented energy from the solar field, the maximum standard coal consumption rate is reduced by 13.53 g/kWh, 12.81 g/kWh and 8.22 g/kWh at 100% load, 75% load and 50% load, respectively. With an increase of solar power input, the boiler efficiency, overall system efficiency and solar thermal-to-electricity efficiency show a downward trend. In addition, the daily coal consumption of summer solstice is the lowest while the winter solstice is the highest for a particular SM and TES hour.

In order to achieve broad-band white emitting phosphor, Ce3+/Dy3+ codoped Ba2B2O5 were synthesized by a solid-state method, and the luminescence property and energy transfer were discussed in detail. Dy3+ doped Ba2B2O5 shows white emission, and the two narrow peaks which are assigned to the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions of Dy3+ ions, respectively. When codoped Ce3+ as sensitizer, the broad-band white emission can be obtained by the energy transfer from Ce3+ to Dy3+ ions in Ba2B2O5, and the mechanism is the dipole-dipole interaction. And the CIE coordinates can be tuned from (0.2501, 0.2323) to (0.3422, 0.3799) by increase Dy3+ content. The emission peak blue-shift of Ce3+ ions in Ba2B2O5:Ce3+, Dy3+ was observed from the thermal spectra, and the mechanism was analyzed. A white light emitting diodes (LEDs) can be fabricated Ba2B2O5:Ce3+, Dy3+ with 380nm chip, and the results show that the phosphor may be a potential application in this field.

Zn2GeO4 consisting of tetrahedron, and it is a self-luminescent material due to the presence of the native defects and shows a bluish white emission excited by ultraviolet. Although Cr3+ doped in a tetrahedron generally cannot show luminescence, in this research, new defects are formed as Cr3+ doped in Zn2GeO4, hence a green emission band can be obtained. Meanwhile, the intensity of host emission is also decreased. Therefore, Zn2GeO4:Cr3+ are synthesized using a high-temperature solid-phase method. Thermoluminescence (TL) and luminescence decay curves are used to investigate the variation of native defects. The emission colour can be tuned from bluish white to green when Cr3+ doped in Zn2GeO4. This result has guidance for controlling the native emission of self-luminescent material.

Neuroinflammation is a major pathophysiological contributor to the progression of the central nervous system disorders. Bavachin is a natural product belonging to the flavonoid class. The anti-neuroinflammatory effect and the molecular mechanisms are not well understood. In this study, we found bavachin can exert anti-neuroinflammatory effect via inhibition of nuclear factor-kappa B (NF-κB) signaling. We found that bavachin can obviously upregulate the expression of A20 (TNFAIP3) in microglial cells. Further studies suggested siRNA-A20 knockdown treatment can attenuate the inhibitory effects of bavachin on neuroinflammation. We further found bavachin can increase the interaction of ubiquitin-editing enzyme A20 complex including A20, Tax1-binding protein 1 (TAX1BP1) and Itch, the subsequently downregulated the K63-ubiquitination of TNF receptor associated factor 6 (TRAF6) and NF-κB signaling pathway. Altogether, our results indicated that bavachin exerted anti-neuroinflammatory effects through inhibition of NF-κB signaling mediated by regulation of ubiquitin-editing enzyme A20 complex. Our finding has important clinical significance for the potential application of bavachin in the treatment of neurological disorders.

With the development of modern lighting and display technology, the color tuneable phosphors have been widely investigated for their application. In order to achieve the color tuneable phosphors, series of Mg2Y2Al2Si2O12:Eu2+ and Mg2-xY1.99Al2Si2O12:xMn2+, 0.01Eu2+ are synthesized. In the host compound, Eu2+ does replace Y3+ non-equivalently, which affects the garnet structure of the samples, and then the internal environment of the crystal affects the energy level splitting of Eu2+, which causes the emission peak of Mg2Y2-yAl2Si2O12:yEu2+ shifts from 425 nm to 495 nm. When codoped Mn2+/Eu2+, the emission color of Mg2-xY1.99Al2Si2O12:xMn2+, 0.01Eu2+ can turn from blue to white with increase Mn2+ concentration, and the color coordinates of Mg1.4Y1.99Al2Si2O12:0.6Mn2+, 0.01Eu2+ locate at (0.3254, 0.2669), and its color temperature is 5791.19 K. The results show that this phosphor may be a potential application to the white light emitting diodes.

Salt stress is a major limiting factor for crop production in many regions. This study examined antioxidant metabolism variation associated with salt stress tolerance of six maize cultivars (Luyu39, Huanong138, Xianyu335, Aoyu3007, Yayu8, Jinping618) under growth chamber environments. The seedlings of six cultivars were subjected to seven NaCl concentrations ranging from 0 to 295 mM for 20 days. The salt stress tolerance of the six cultivars varied largely, with their salt tolerance threshold values ranging from 184.5 to 303.4 mM. Luyu39 had the highest threshold value and was considered as salt tolerant cultivar, and Jinping618 had the lowest threshold (184.5 mM) and was considered as salt sensitive cultivar. Luyu39 had lower MDA content, higher antioxidant enzyme (SOD, CAT, and POD) activity, and lower proline content when compared to Jinping618 at 245 mM and 295 mM NaCl levels. The results suggest that MDA, antioxidant enzyme activity, and proline content can be used as metabolic markers to evaluate relative salt tolerance of different maize cultivars under severe salt stress (245 mM or higher concentration NaCl) conditions.

High luminous efficacy, high-color-rendering index (CRI), single-phased and single Eu2+ doped warm white-light phosphors Ca2(BO3)1−x(PO4)xCl were synthesized by controlling anion substitution systematically. The anionic polyhedron substitution of PO4 for BO3 causes a great distortion of the host lattice, which enables the tuning of luminescent properties. An additional distinct emission peaking at 462 nm (in addition to 577 nm of Ca2BO3Cl:Eu2+) was observed under the same excitation when PO43− was introduced. Therefore, with the crystal structure evolution, the ratio blue/yellow was changed by adjusting the ratio of BO3/PO4, which provides a new way for developing a high CRI warm white-light phosphor. The internal quantum efficiency (IQE) of the Ca2(BO3)0.64(PO4)0.36Cl:Eu2+ phosphor was 64.0%. The warm white light-emitting diode (w-LED) was fabricated with Ca2(BO3)0.64(PO4)0.36Cl:Eu2+ phosphor and a 380 nm-emitting InGaN chip, which exhibited promising properties, such as the high Ra (83.4), the low correlated color temperature (3907 K) and high luminous efficacy ɳL (30.4 lm/W). Importantly, the w-LED shows a greater R9 = 39.3 versus R9 = 14.3 of commercial YAG:Ce3+. These phenomenon demonstrates that Ca2(BO3)1−x(PO4)xCl:Eu2+ as a warm white-light phosphor will have a great prospect of application in indoor lighting.

A series of single-phase phosphors Ba3Ca2(PO4)3F:M (M = Ce3+, Eu2+, Mn2+) are prepared through a high temperature solid state method, and the luminescence properties and the energy transfer mechanisms from Ce3+ to Eu2+, Ce3+ to Mn2+, and Eu2+ to Mn2+ are investigated in detail. Ce3+, Eu2+ or Mn2+ single doped Ba3Ca2(PO4)3F can produce blue, green and orange-red emission, respectively. An effective energy transfer from Ce3+ to Eu2+ and from Ce3+/Eu2+ to Mn2+ occurs in Ba3Ca2(PO4)3F, and the emission color can change from blue to green, blue to red, green to yellow, and red to yellow in Ce3+/Eu2+, Ce3+/Mn2+, Eu2+/Mn2+ and Ce3+/Eu2+/Mn2+ doped Ba3Ca2(PO4)3F, respectively. Moreover, for Ba3Ca2(PO4)3F: Eu2+, Eu2+ ions prefer to occupy the M2 sites at low concentration, and then partially occupy the M1 sites with the concentration increasing, and the energy transfer from Eu2 (M2) to Eu1 (M1) sites are conformed. For Ba3Ca2(PO4)3F:0.03Eu2+, zMn2+, Eu2+ ions tend to be Eu3+ with increasing Mn2+ concentration due to the energy transfer from Eu2+ to Mn2+.

Current coal industry causes significant environmental pollution and the most air pollution deaths in the world, making the development of new eco-friendly applications one of the top priorities. Coal contains up to 50 % humic substances (HS), the majority of which is humic acid (HA). HA is well known for its beneficial properties and thus compounds extracted from coal can be used to develop new applications. To address this issue, we assessed structural composition of coal HS by measuring their spectroscopic properties. As the result, obtained spectra can be used to identify information about the molecules and thus allowing describing the composition of HS. The purpose of this study was to identify HS properties of weathered coal in regards to finding new uses for this otherwise neglected natural resource. The results show that weathered coal contains relatively high oxygen content and indicate transformations of O-containing functional groups. Weathered coal has high amount of bioactive molecules as well as condensed aromatics. The major coal forming compounds are acridine, anthracene, perylene, tetracene and naphthalene and it does not depend upon where the study site is located.

Norvancomycin is an antibiotic that has been approved for the treatment of infections caused by antibiotic-resistant Gram-positive bacteria and has been used in China for more than a decade. However, the cerebrospinal fluid (CSF) penetration of norvancomycin has not been evaluated. The aims of the study were (i) to investigate the pharmacokinetics and CSF penetration of norvancomycin in meningitis and non-meningitis patients and (ii) to recommend favourable dosing regimens in meningitis patients. Twenty adult patients (ten with meningitis and ten without meningitis) requiring norvancomycin treatment were enrolled. All patients received a norvancomycin regimen of 800 mg every 12 h. Blood and CSF samples were consecutively collected up to 12 h after the end of the fourth 60-min infusion. Norvancomycin concentrations both in serum and CSF were measured using a high-performance liquid chromatography (HPLC) assay. CSF penetration of norvancomycin was evaluated by calculating the CSF/serum ratio. Mean norvancomycin serum trough levels were 9.9 ± 1.44 µg/mL in patients with meningitis and 10.08 ± 1.12 µg/mL in patients without meningitis (P 0.05). In addition, norvancomycin penetrated into the inflamed meninges, with mean CSF concentrations of 3.93-10.52 µg/mL and mean CSF/serum ratios of 0.18-0.43, both of which were significantly higher than in patients without meningitis (P 0.05). These results suggest that norvancomycin has higher CSF penetration in patients with meningitis compared with other groups and that norvancomycin is effective in treating patients with purulent meningitis at a comparably low dose.

A series of Dy3+, Ce3+/Dy3+, Eu2+/Dy3+ and Ce3+/Eu2+/Dy3+ doping LiBaB9O15 (LBB) phosphors were synthesized via a high temperature solid-state method. LBB:Dy3+ cannot create light under ultraviolet radiation, however, LBB:Ce3+, Dy3+ can produce yellow emission under 295 nm excitation. The energy transfer occurs from Ce3+ to Dy3+ ions via electric dipole-dipole interaction and the critical distance is estimated to be 21.15 A based on concentration quenching model. Generally, Eu2+ ion is a sensitizer to Dy3+ ion, however, there is only the emission of Eu2+ in LBB:Eu2+, Dy3+, which means there is no energy transfer from Eu2+ to Dy3+ ions. Interestingly enough, when doping Eu2+ ion into LBB:Ce3+, Dy3+, white emission can be achieved by increase the blue (350–425 nm) emission intensity. The spectral property, quantum efficiency, CIE chromaticity coordinates and thermal quenching property of LBB:Ce3+, Eu2+, Dy3+ are investigated. The results indicate that LBB:Ce3+, Eu2+, Dy3+ may be a potential application to white light emitting diodes.

Na3Bi(PO4)2:Eu3+/Tb3+/Dy3+/Sm3+ phosphors were synthesized via a high-temperature solid-state reaction method. The X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), diffuse reflection, photoluminescence (PL) and fluorescent decay curves were utilized to characterize the obtained phosphors. Under n-UV excitation, Na3Bi(PO4)2:Eu3+/Tb3+/Dy3+/Sm3+ samples show the characteristic f-f emissions and present red, green, yellow and orange emission, respectively. When Tb3+, Dy3+ and Sm3+ were co-doped into the Na3Bi(PO4)2:Eu3+ phosphors, tunable emission colors can be obtained and can be efficiently adjusted by varying the doping ions and the doping concentration. The energy transfer mechanisms were investigated in detail and demonstrated that there is an efficient energy transfer from Tb3+, Dy3+ and Sm3+ to Eu3+ via a dipole-dipole interaction mechanism. Additional, as the temperature increases from RT to 150 °C, the PL intensity of Tb3+-Eu3+, Dy3+-Eu3+ and Sm3+-Eu3+ co-doped phosphors decreased to 86%, 85% and 88%, respectively, which prove good thermal stability. All the CIE coordinates of as-prepared phosphors are displayed and show abundant colors, making these materials have potential applications for n-UV-excited white-LEDs.

Methods: Human endometrial tissues from proliferative stage to secretory stage of normal menstrual cycle, and decidua tissues from normal pregnancy and recurrent pregnancy loss patients were collected to analyze the expression of OPG. Human endometrial stromal cells (HESCs) and primary human endometrial stromal cells (ESCs) were performed to explore the function and mechanism of OPG during decidualization. Findings: OPG expressed in human endometrium across menstrual cycle and during the human endometrial stromal cell decidualization. Knockdown experiments revealed that decrease of OPG impaired the expression of decidual markers prolactin (PRL) and insulin-like growth factor binding protein-1 (IGFBP-1) without interference with the cell proliferation. Knockdown of OPG increased the phosphorylation of Akt and ERK1/2 during HESCs decidualization. Inhibition of PI3K signaling can rescue the impaired expression of decidual markers PRL and IGFBP-1 in response to OPG knockdown, but the ERK1/2 inhibition cannot. Further experiments revealed that OPG mediates human endometrial stromal decidualization by interacting with Syndecan-1 via decreasing Akt phosphorylation. Finally, endometrial expression of OPG was significantly lower in recurrent pregnancy loss (RPL) endometrial samples than that in normal pregnancy samples during the first trimester. Interpretation: OPG is required for decidualization, and the decrease of OPG is associated with recurrent pregnancy loss. These findings would provide a new candidate for diagnosis and treatment of infertility in women. Funding: This work was supported by the National Natural Science Foundation of China. Declaration of Interest: The authors declare that there is no conflict of interests. Ethical Approval: This study was approved by the Medical Ethics Committee of The First Affiliated Hospital of Xiamen University and written informed consent was obtained from all participants in accordance with the guidelines in The Declaration of Helsinki 2000.

Full-spectrum plant growth light emitting diode (LED) prepared using a variety of phosphors has some problems, such as energy loss and spectral distortion. It is the solution that designing a kind of phosphor, which is the single activated ion doped phosphor with the multiple emission. To achieve this goal, the host Mg2Y2Al2Si2O12 (Abbreviated as: MYASO) was selected from a large number of garnet materials which has the multi-sites, and the Mn2+ was selected as the activated ion which can produce the different emission in the different crystal field. The results show that Mn2+ can produce the green light (536 nm), red light (635 nm) and deep red light (735 nm), which correspond to the Mn2+ substituting for the tetra-coordinated Al3+, the octa-coordinated Mg2+ and the hexa-coordinated Mg2+, respectively, importantly, this phosphor can be efficiently excited by the 456 nm blue light, which matches well with the blue LED chip. Therefore, it may be a great potential application value in the production of plant growth LEDs.

Broadband near-infrared (NIR) long-persistent phosphors with adjustable optical property have been urgently demanded for practical applications in bio-imaging and plant cultivation. Herein, Cr3+ doped Mg3Y2Ge3O12 garnet phosphors with ultra-broadband NIR emissions (600−1200 nm) peaked at 776 nm were prepared via a high-temperature solid-state reaction method, and the cation sites for Cr3+ were well identified and assigned based on the Rietveld refinement and time-resolved emission spectra (TRES). Under the excitation at 436 nm, wide-range modulations in intensity, wavelength (763−834 nm) and bandwidth (143−227 nm) of 4T2→4A2 (4F) transition were achieved via Zn2+/Ca2+ substitution, which completely covers the maximum absorption ranges (715−1050 nm) of bacteriochlorophyll from anaerobic photosynthetic bacteria (PSB). According to the classic Tanabe-Sugano theory, the crystal field parameters around different Cr3+ centers were calculated to explain the spectral tailoring effect. Meanwhile, the afterglow duration was greatly improved from 2 min to 66 and 240 min after co-doping Zn2+/Ca2+, and the trap distribution and mechanism was elaborately explored via thermos-luminescence (TL) experiments. Above results provide an effective strategy for designing NIR-emitting phosphors with desired optical and afterglow performance, which well meets the light requirements of diverse applications especially in plant growth.

A series of white emitting phosphor of KMgLa (PO4)2:Dy3+ were synthesized via high temperature solid-state method, and the luminescence properties were systematically investigated. Under the 349 nm ultraviolet excitation, KMgLa(PO4)2:Dy3+ shows the 481 nm (blue) and 575 nm (yellow) emission peaks, which are assigned to the 4F9/2–6H15/2 and 4F9/2–6H13/2 transitions of Dy3+. The emission intensities of KMgLa(PO4)2:Dy3+ are influenced by the Dy3+ concentration, and the concentration quenching effect is observed, and the corresponding mechanism is the dipole–dipole (d–d) interaction, and the critical distance is calculated to be 1.136 nm. The CIE chromaticity coordinates of KMgLa(PO4)2:Dy3+ are close to that of standard white light. According to the emission intensity with different temperatures, the sample should have the good thermal stability. The results indicate that KMgLa(PO4)2:Dy3+ may be a potential application to white LEDs.