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Photocatalysis has been widely considered to be an effective way for solving the worldwide environmental pollution issues. Herein, a new type of three-dimensional (3D) ternary graphene-carbon quantum dots/g-C 3 N 4 nanosheet (GA-CQDs/CNN) aerogel visible-light-driven photocatalyst was synthesized via a two-step hydrothermal method. In this unique ternary photocatalyst, both carbon quantum dots (CQDs) and reduced graphene oxide (rGO) could improve the visible light absorption and promote the charge separation. Furthermore, reduced graphene oxide (rGO) could act as a supportor for the 3D framework. Such a ternary system overcame the drawbacks of bulk g-C 3 N 4 (BCN) and achieved the enhanced photocatalytic activity and long-term stability. As a result, the methyl orange (MO) removal ratio of GA-CQDs/CNN-24% was up to 91.1%, which was about 7.6 times higher than that of bulk g-C 3 N 4 (BCN) under the identical conditions. Moreover that GA-CQDs/CNN-24% exhibited inappreciable loss of photocatalytic activity after four-cycle degradation processes. Finally, the photocatalytic mechanism of GA-CQDs/CNN-24% was interpreted both theoretically and experimentally. [ABSTRACT FROM AUTHOR]

[Display omitted] • A coating with pH-dependent Cu2+ release was granted on the Ti. • The coating was composed of polydopamine and silk protein, exhibiting outstanding biocompatibility in vivo and in vitro. • While simulating a large gathering of bacteria (slightly acidic conditions), the coating could set free abundant Cu2+ to strongly kill bacteria and achieve self-defense. The implantation of medical devices is frequently accompanied by the invasion of bacteria, which may lead to implant failure. Therefore, an intelligent and responsive coating seems particularly essential in hindering implant-associated infections. Herein, a self-defensive antimicrobial coating, accompanied by silk fibroin as a valve, was successfully prepared on the titanium (Ti-Cu@SF) for pH-controlled release of Cu2+. The results showed that the layer could set free massive Cu2+ to strive against E. coli and S. aureus for self-defense when exposed to a slightly acidic condition. By contrary, a little Cu2+ was released in the physiological situation, which could avoid damage to the normal cells and showed excellent in vitro pH-dependent antibiosis. Besides, in vivo experiment confirmed that Ti-Cu@SF could work as an antibacterial material to kill S. aureus keenly and display negligible toxicity in vivo. Consequently, the design provided support for endowing the layer with outstanding biocompatibility and addressing the issue of bacterial infection during the implantation of Ti substrates. [ABSTRACT FROM AUTHOR]

Nowadays, the harm caused by the leakage of oil and dangerous organic solvents to the ecological environment and human health cannot be ignored, and effective treatment measures are urgently needed to alleviate the current situation. Therefore, the development of low-cost and efficient adsorbents is the key to solve the problem. In this paper, konjac glucomannan was used as flexible skeleton. Flexible aerogel based on an interpenetrating network of konjac glucomannan and reduced graphene oxide was prepared by two-step hydrothermal method. On this basis, the composite aerogel was superhydrophobically modified to improve its adsorption selectivity. A series of characterization results showed that the adsorbent had flexible three-dimensional porous structure, excellent mechanical properties, adsorption selectivity, recyclability and biodegradability. At the same time, the composite aerogel synthesized by a simple and environmentally friendly method could realize the continuous separation of oil and water by vacuum pump. It showed that its application in the field of high-efficiency oil–water separation had a broad prospect. [ABSTRACT FROM AUTHOR]

To effectively treat the pollutant in sewage, a new-type three-dimensional aerogel based on graphene oxide and waste paper was fabricated via simple mixing and freeze-drying processes. Therein, waste paper was activated in advance, and polyvinyl alcohol served as physical crosslinking agent. The results showed that the obtained aerogel with porous three-dimensional network structure exhibited good thermal stability. When it acted as adsorbent for treating organic dye (methylene blue) and antibiotic (ciprofloxacin), the adsorption process was explored. In single system, the pseudo-first-order and pseudo-second-order kinetic models were used to discuss the detail about the aerogel adsorbing pollutant. Moreover, the Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and calculate the isotherm constants. Thermodynamic results stated that the adsorption of pollutant onto aerogel was feasible and spontaneous. In binary system, the adsorption capacity of methylene blue by aerogel increased, while the adsorption capacity of ciprofloxacin by aerogel declined. The pseudo-second-order kinetics was consistent with the adsorption of pollutant by aerogel in such binary system. This study would provide a new boulevard to develop environmental, low-cost and high-efficiency adsorbent for removing pollutant from wastewater. [ABSTRACT FROM AUTHOR]

The composite in this case was produced from corn cob flour (CCF), wood ash (WA) and polypropylene (PP). WA with different concentration (1, 3, 5, 10 wt%) served as reinforced filler for corn cob/plastic composite. In order to increase the interfacial adhesion between matrix and filler, the maleic grafted PP was used as compatilizer. The results of infrared spectrum, thermogravimetric analysis, scanning electron microscope, mechanical property and water absorption were reported. The results indicated that the flexural modulus and tensile modulus of CCF/WA/PP composite (CCWPC) increased with increasing the addition of WA. When the addition of WA was 10 wt%, they reached 2550 and 324 MPa, respectively. Furthermore, the flexural strength and tensile strength of CCWPC were lower than those of PP. The moisture absorption of CCWPC increased with adding the loading of WA. The presence of WA also influenced the thermal property of CCWPC. [ABSTRACT FROM AUTHOR]

The purpose of this investigation was to evaluate the properties of bio-flour-filled composites. The composites used in this study were prepared from polypropylene, wood flour (WF) and cotton stalk bark (CSB). CSB was added with different concentrations (2.5 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, 30 wt.%). Maleic anhydride grafted polypropylene (PP-g-MA) was served as a compatibilizer to increase the interfacial adhesion between the ingredients. Water absorption, morphology, mechanical and thermal properties were investigated. The results indicated that the flexural properties and tensile modulus of cotton stalk bark plastic composites (CSBPCs) were increased with the increasing concentration of CSB. However, the tensile strengths exhibited a negative correlation with the CSB content, which reached 32.9 MPa when the adding of CSB was 30 wt.%. The moisture absorption of CSBPC showed a higher value than that of neat PP, and it was increased with the increasing concentration of CSB. The thermal experiments showed that the decomposition temperatures of CSBPCs were higher than that of PP. [ABSTRACT FROM AUTHOR]

The waterborne polyurethane-acrylate (WPUA and Wsi-PUA) oligomers were prepared by anionic self-emulsifying method, using isophorone diisocyanate (IPDI), polyethylene glycol (PEG), dimethylol propionic acid (DMPA), vinyl hydroxyl silicone oil (VHSO) and hydroxyethyl methyl acrylate (HEMA) as raw materials. Then, a series of UV-curable waterborne Wsi-PUA–C 3 N 4 composites containing different content of g-C 3 N 4 were obtained with oligomer and photoinitiator Darocur 1173. FTIR, XRD, TEM, SEM, and TGA were employed to investigate the structure, morphology and thermal property of the Wsi-PUA–C 3 N 4 composite films. The effect of g-C 3 N 4 content on the performance was also investigated. The mechanical performance, water resistance and gel content of UV-PUA films were measured. It was found that with g-C 3 N 4 particle was introduced into Wsi-PUA oligomer, the hardness, tensile strength, gel content, water resistance and thermal stability of composite films were significantly augmented. Moreover, when the content of g-C 3 N 4 was 1.0 wt.%, the UV-curable film had the best mechanical property. The obtained composite is promising for a number of applications, e.g., for protecting the surfaces of metal and wood. [ABSTRACT FROM AUTHOR]

Diabetic wounds are a significant clinical challenge. Developing effective antibacterial dressings is crucial for preventing wound ulcers caused by bacterial infections. In this study, a self-healing antibacterial hydrogel (polyvinyl alcohol (PVA)–polylysine–gum arabic, PLG hydrogels) with near-infrared photothermal response was prepared by linking PVA and a novel polysaccharide–amino acid compound (PG) through borate bonding combined with freeze–thaw cycling. Subsequently, the hydrogel was modified by incorporating inorganic nanoparticles (modified graphene oxide (GM)). The experimental results showed that the PLGM 3 hydrogels (PLG@GM hydrogels, 3.0 wt%) could effectively kill bacteria and promote diabetic wound tissue healing under 808-nm near-infrared laser irradiation. Therefore, this hydrogel system provides a new idea for developing novel dressings for treating diabetic wounds. [ABSTRACT FROM AUTHOR]

Diabetic wounds are a significant clinical challenge. Developing effective antibacterial dressings is crucial for preventing wound ulcers caused by bacterial infections. In this study, a self-healing antibacterial hydrogel (polyvinyl alcohol (PVA)–polylysine–gum arabic, PLG hydrogels) with near-infrared photothermal response was prepared by linking PVA and a novel polysaccharide–amino acid compound (PG) through borate bonding combined with freeze–thaw cycling. Subsequently, the hydrogel was modified by incorporating inorganic nanoparticles (modified graphene oxide (GM)). The experimental results showed that the PLGM 3 hydrogels (PLG@GM hydrogels, 3.0 wt%) could effectively kill bacteria and promote diabetic wound tissue healing under 808-nm near-infrared laser irradiation. Therefore, this hydrogel system provides a new idea for developing novel dressings for treating diabetic wounds. [ABSTRACT FROM AUTHOR]

We synthesized a temperature-sensitive antibacterial hydrogel, defined as NIPAM-CG/GM hydrogel. First, vinyl carboxymethyl chitosan (CG) was synthesized as a crosslinking carrier and silane dispersed graphene (GM) was synthesized as a reinforcer. Then, the N-isopropylacrylamide (NIPAM) monomer was free-radical polymerized with the vinyl groups of CG and GM to form a NIPAM-CG/GM hydrogel without any crosslinking agent. The influences of different hydrogel compositions on the microstructure, compressive properties, swelling, drug loading, and drug release properties of the hydrogels were discussed, and its temperature sensitivity was also demonstrated. The results showed that the lower critical solution temperature (LCST) and mechanical properties of the hydrogel could be adjusted by controlling the amount of CG and GM. Next, its biocompatibility was characterized, and its antibacterial performance was tested against Escherichia coli and Staphylococcus aureus. The antibacterial mechanism was explained by measuring the difference in the ion concentration outside the membrane and changes in the morphology of live/dead bacteria. NIPAM-CG/GM had a high drug loading and nearly complete drug release at a physiological temperature of 37 °C. Its moderate mechanical properties, excellent biocompatibility, and antibacterial effects give NIPAM-CG/GM great potential applications as a wound dressing. [Display omitted] • Highly-stable and dispersed silanized graphene was prepared • Vinyl groups were introduced into carboxymethyl chitosan as a carrier for free-radical polymerization • The introduction of inorganic nanoparticles enhanced the mechanical properties of the hydrogel • Free radical polymerization of NIPAM made the hydrogel temperature-responsive • NIPAM-CG/GM hydrogel displayed excellent antibacterial activity and biocompatibility [ABSTRACT FROM AUTHOR]

A high efficient visible-light-region Cu 2 O/g-C 3 N 4 /RGO composite 3D aerogel photocatalyst was fabricated by a facile self-assemble method. The aerogel composite with various RGO and g-C 3 N 4 to Cu 2 O weight ratios was synthesized and characterized. The results showed that the Cu 2 O/g-C 3 N 4 heterojunction absorbed visible light region shifted to a lower energy. In order to improved photocatalytic activity, the Cu 2 O/g-C 3 N 4 heterojunction loaded on reduced graphene oxide sheets resulted in increasing absorption in the visible light range and improving photodegradation activity. The optimal content of Cu 2 O in the Cu 2 O/g-C 3 N 4 /RGO aerogel was 40%, which exhibited the effectively synthetized Cu 2 O/g-C 3 N 4 heterojunction, and greatly improved photocatalytic activity. Moreover, the ternary composite aerogel exhibited 96% (Methylene Blue) and 83% (Methyl Orange) degradation efficiency within 80 min. The combined heterojunction with synergistic effects of this novel composite aerogel account for the excellent photocatalytic efficiency. [ABSTRACT FROM AUTHOR]

A major problem associated with colon cancer is liver metastasis. A colon-targeted drug delivery system is one way to address this problem after the resection of colorectal cancer. However, traditional drug delivery systems face many challenges, such as an inability to control the release rate, inaccurate targeting, susceptibility to the microenvironment and poor stability. Here, we report the development of a graphene oxide (GO)-based, sodium alginate (ALG) functionalized colon-targeting drug delivery system, that is loaded with 5-fluorouracil (5-FU) as the anti-cancer drug (denoted as GO-ALG/5-FU). Our results demonstrate that the as-prepared drug delivery system possesses a much lower toxicity and better colon-targeting controlled-release behaviours. We show that GO-ALG/5-FU significantly inhibited tumour growth and liver metastasis and prolonged the survival time of mice. We anticipate that our assay will help improve basic research of colon-targeted drug delivery systems and provide a new way to treat colon cancer liver metastasis. [ABSTRACT FROM AUTHOR]

This study was aimed at evaluating the effect of oil extraction in spent coffee ground (SCG) on the properties of spent coffee ground-polypropylene composites. Coffee oil was removed from SCG by ultrasonication extraction. SCG and extracted spent coffee ground (ESCG) were used to reinforce the polypropylene (PP) in this research. Moisture uptakes, morphologies, mechanical properties, thermal properties, and accelerated aging test of composites were examined as a function of oil extraction. The results suggested that the extraction of coffee oil improved the water resistance of composites. The mechanical properties of spent coffee grounds-polypropylene composites (SCGPCs) were improved significantly after oil extraction, which suggested that the oil extraction was helpful to improve the interfacial adhesion and compatibility between filler and PP matrix. The moisture absorption of SCGPC showed a dramatic decrement after oil extraction. The results also revealed that the oil extraction improved the thermal property of composite. [ABSTRACT FROM AUTHOR]

Quaternary ammonium salts (QAS) have been widely applied in daily life because of their antibacterial properties. However the antibacterial effects of QAS cannot be effectively utilized due to the uncontrolled release. In this work, dodecyl dimethyl benzyl ammonium chloride (1227) and bromohexadecyl pyridine (CPB) were assembled on surfaces of graphene oxide (GO) through π–π interactions to form GO/QAS nanocomposites, i.e., GO-1227 and GO-CPB. In the comparison with pure CPB and 1227, GO-CPB and GO-1227 nanomaterials show biocompatible with reduced cytotoxicity. We found that GO could increase the antibacterial effect when the weak antibacterial agent was adopted. Remarkably, GO-1227 has exhibited stronger antimicrobial properties then GO-CPB, while GO-CPB has shown long-term slow-release antibacterial properties and CPB is facile to be loaded on GO surfaces. [ABSTRACT FROM AUTHOR]

Honeycomb-like NiMn layered double hydroxide nanostructures have been successfully grafted on carbon cloth via a simple hydrothermal synthesis, which show good electrochemical performance with 2.687 C cm −2 (2239 F g −1 ) at a current density of 5 mA cm −2 . It is notable that this honeycomb-like nanostructure could supply sufficient electrochemically active sites for effective redox reactions. Moreover, an asymmetric supercapacitor with good flexibility is fabricated based on this NiMn-LDH electrode. Over 110% of the initial capacitance is retained after repeating 10,000 charge-discharge cycles at a current density of 3 mA cm −2 . The honeycomb-like NiMn-LDH flexible electrode with good performance proposes a new pathway for flexible energy storage devices. [ABSTRACT FROM AUTHOR]

Tuberculosis is the most frequent cause of infection-related death worldwide. A new disposable electrochemical immunosensor with low cost and simple fabrication was proposed to detect interferon-γ (IFN-γ). Diallyldimethylammonium chloride (PDDA) and Au nanoparticle (AuNP) composite were used to provide an efficient biointerface, horseradish peroxidase (HRP)-labeled antibody-conjugated AuNP (HRP-Ab2-AuNP) bioconjugates were used as a novel signal tag. The large amounts of HRP on the signal tag can catalyze the oxidation of Hydroquinone (HQ) by H 2 O 2 , which can induce an amplified reductive current. The catalytic reduction current was related to the amount of HRP immobilized on the surface, which itself was related to the concentration of IFN-γ. Under optimized conditions, the proposed immunosensor showed a high sensitivity and a linear range of 0.1–10,000 pg/mL with a detection limit of 0.048 pg/mL. The assay results of clinical serum samples obtained by the immunosensor were in acceptable agreement with the reference values. Therefore, the immunosensor possessed excellent clinical value in early diagnosis and control of tuberculosis. [ABSTRACT FROM AUTHOR]

In this study, three-dimensional (3D) flower-like nickel hydroxide (Ni(OH) 2 ) is decorated on one-dimensional fiber-like polyaniline (PANI) to obtain PANI/Ni(OH) 2 composite. Two-step hydrothermal method is used where PANI serves as crystal growth modifier of Ni(OH) 2 . By reducing the initial concentration of PANI, the polymorph of Ni(OH) 2 converts from β -to α -phase and the morphology of Ni(OH) 2 correspondingly changes from nanoplate to 3D flower-like, which significantly impacts the electrochemical activity of PANI/Ni(OH) 2 composite. Results show that fibrous PANI with high available surface area is expected to have many active sites for the deposition of nanoparticles. Besides, 3D flower-like Ni(OH) 2 , which can facilitate the transition for charge, contacts closely with PANI. Due to the good electrical conductivity and electrochemical activity of PANI with high proton doping level, the introduction of PANI can enhance the electrical conductivity and electrochemical performance of composite. Consequently, the PANI/Ni(OH) 2 electrode exhibits good electrochemical property, including high capacity, good rate capability and long cycle life. In addition, this work will provide a new concept for using polymer in dominating the structure, morphology and electrochemical property of electrode material. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate and characterize various properties of experimental composition prepared from graphitic carbon nitride (g-C 3 N 4 ), wood flour (WF) and polypropylene (PP). g-C 3 N 4 with different concentrations (1 wt.%, 3 wt.%, 5 wt.% and 10 wt.%) were used as reinforcing filler for wood plastic compositions (WPCs). Maleic anhydride grafted polypropylene (PP-g-MA) was added as a coupling agent to increase the interaction between the components. Water absorption, morphology, physical, mechanical and thermal properties of the as-prepared composites were evaluated. The results showed that the tensile modulus of the composite was increased by 142.9% with increasing of g-C 3 N 4 contents to 5 wt.%, reaching approximately 498 MPa compared to WPC. Moreover, the flexural and tensile strengths reached their maximum values when the concentrations of g-C 3 N 4 were 1 wt.% and 3 wt.%, respectively. When maintaining the g-C 3 N 4 at a low concentration, it was well dispersed in the WPC with thin plate shape. However, when more g-C 3 N 4 (3–10 wt.%) was introduced, the enhancing effect began to diminish because of the agglomeration of g-C 3 N 4 which caused poor interfacial adhesion. The water absorption results showed a lower value with the addition of 1 wt.% g-C 3 N 4 , and the thermal tests showed that the degradation temperature shifted to higher value clearly after the addition of g-C 3 N 4 . Besides, with the addition of g-C 3 N 4 improved the outward color compared to the control sample. [ABSTRACT FROM AUTHOR]

In this study, UV-curable epoxy acrylate film was reinforced with benzyl triphenyl phosphorus chloride-intercalated vermiculite (BTPC-VMT). BTPC-VMT was prepared by intercalating benzyl triphenyl phosphorus chloride (BTPC) into vermiculite (VMT) and was used as reinforcing filler. Then, X-ray diffraction and Scanning electronic microscope results of hybrid films indicated that BTPC-VMT was well dispersed in the matrix. The hybrid films displayed enhanced tensile strength, impact strength, and pencil hardness without sacrificing elongation at break. Moreover, the thermal property of hybrid films was generally improved. The resulting hybrid films are promising for a number of applications, e.g. for metal and wood for their surface protection. [ABSTRACT FROM PUBLISHER]

Hexagonal nickel hydroxide/nickel decorated on reduced graphene oxide (rGO&Ni(OH) 2 –Ni) has been prepared via easy one-step chemical precipitation method and subsequent annealing treatment. The results show that the thermal stability of Ni(OH) 2 is enhanced by the incorporation of Ni. Besides, hexagonal Ni(OH) 2 –Ni nanoplate which can supply a short diffusion and migration pathway for electron and electrolyte ion contacts closely with the surface of rGO, resulting that the agglomeration of rGO is effectively prevented. Due to the good electrical conductivity of Ni, the incorporation of Ni can also improve the electrical conductivity of Ni(OH) 2 . More importantly, the Ni (111) plane is grown after annealing treatment, which plays a key role in Ni for further improving the electrochemical activity of composite. Consequently, the rGO&Ni(OH) 2 –Ni electrode exhibits high capacitance, high energy density, excellent rate capability, good cycle stability, etc. The advantages of easy preparation and excellent electrochemical performance imply the great potential application of rGO&Ni(OH) 2 –Ni in supercapacitors. Moreover, it is worthy noting that this work will offer a new approach for using metal nanoparticle in improving the electrochemical property of supercapacitor electrode material. [ABSTRACT FROM AUTHOR]

A new hybrid material consisting of nickel hydroxide and nitrogen-doped reduced graphene oxide (N-rGO/Ni(OH) 2 ) for supercapacitor electrode material is prepared via an easy one-step hydrothermal method, where the reduction and nitrogen doping of graphene oxide (GO) and the in situ formation of Ni(OH) 2 are achieved simultaneously. The results show the improved electrochemical activity of N-rGO/Ni(OH) 2 upon nitrogen doping. Moreover, thanks to the positive synergetic effect between N-rGO and Ni(OH) 2 , the synthesized N-rGO/Ni(OH) 2 composite shows superior electrochemical performance, including high capacitance, excellent rate capability and good cycle life. Hence, the facile preparation approach in this work will be considered as a new way to obtain metal oxide or hydroxide/N-rGO material which can be used as advanced electrode material in high-performance supercapacitors. [ABSTRACT FROM AUTHOR]

Multifunctional glass windows that combine energy storage and electrochromism have been obtained by facile thermal evaporation and electrodeposition methods. For example, WO3 films that had been deposited on fluorine-doped tin oxide (FTO) glass exhibited a high specific capacitance of 639.8 F g−1. Their color changed from transparent to deep blue with an abrupt decrease in optical transmittance from 91.3 % to 15.1 % at a wavelength of 633 nm when a voltage of −0.6 V (vs. Ag/AgCl) was applied, demonstrating its excellent energy-storage and electrochromism properties. As a second example, a polyaniline-based pseudocapacitive glass was also developed, and its color can change from green to blue. A large-scale pseudocapacitive WO3-based glass window (15×15 cm2) was fabricated as a prototype. Such smart pseudocapacitive glass windows show great potential in functioning as electrochromic windows and concurrently powering electronic devices, such as mobile phones or laptops. [ABSTRACT FROM AUTHOR]

Multifunctional glass windows that combine energy storage and electrochromism have been obtained by facile thermal evaporation and electrodeposition methods. For example, WO3 films that had been deposited on fluorine-doped tin oxide (FTO) glass exhibited a high specific capacitance of 639.8 F g−1. Their color changed from transparent to deep blue with an abrupt decrease in optical transmittance from 91.3 % to 15.1 % at a wavelength of 633 nm when a voltage of −0.6 V (vs. Ag/AgCl) was applied, demonstrating its excellent energy-storage and electrochromism properties. As a second example, a polyaniline-based pseudocapacitive glass was also developed, and its color can change from green to blue. A large-scale pseudocapacitive WO3-based glass window (15×15 cm2) was fabricated as a prototype. Such smart pseudocapacitive glass windows show great potential in functioning as electrochromic windows and concurrently powering electronic devices, such as mobile phones or laptops. [ABSTRACT FROM AUTHOR]

Highlights: [•] Bamboo charcoal (BC) was used as reinforcing filler of wood-plastic composites. [•] BC could have strong interfacial interaction in the wood-plastic composites (WPCs). [•] The BC-WPC composites displayed lower water absorption properties. [•] The BC-WPC composites displayed higher flexural, tensile and thermal properties. [ABSTRACT FROM AUTHOR]

Highlights: [•] Organic vermiculite (O-VMT) was prepared by intercalation reaction. [•] O-VMT was used as reinforcing filler of wood–plastic composites (WPC). [•] O-VMT have homogeneous dispersion and strong interfacial interaction in WPC. [•] The WPC/O-VMT composites displayed lower water absorption properties. [•] The WPC/O-VMT composites displayed higher flexural and tensile properties. [Copyright &y& Elsevier]

Abstract: A new phosphor CaZrO3:Li,Pr was synthesized by a traditional solid-state reaction method. The luminescent properties and thermoluminescence curves were investigated. Long afterglow was observed in the CaZrO3:Li,Pr after excitation by 254nm light, and the duration can reach nearly 3h in the light perception of dark-adapted human eyes (0.32mcd/m2). The main emission peak was ascribed to Pr3+ ions transition from 3P0 → 3H4, and the afterglow may be ascribed to the suitable trap centers enhanced by the introduction of Li+ in the CaZrO3host lattice. Further more, the mechanism of the afterglow was discussed. [Copyright &y& Elsevier]