Search

Citronellol (CI)-loaded, chitosan (CS)-enclosed dendritic mesoporous organosilica nanoparticles (CI@D-MONs@CS) are successfully fabricated. The synthesized CI@D-MONs@CS present spherical shape with the particle size of 424±24 nm in diameter and dendritic mesopores. CI loading ratio of CI@D-MONs@CS is about 12.42% from TGA analysis. CI release from CI@D-MONs@CS exhibits pH-redox dual responsiveness. More interesting, the axillary deodorant effect is investigated with Staphylococcus haemolyticus in an artificial sweat model. The results show that CI@D-MONs@CS present an excellent bacteria-killing effect and the smell of artificial sweat is greatly improved, avoiding the formation of undesirable odorant compounds from the bacteria. The obtained CI@D-MONs@CS is a potential carrier of natural fragrance or actives with dual responsive release. The application of CI@D-MONs@CS is a new and effective strategy to the axillary odor problem. • The pH-redox dual responsive nanoparticles CI@D-MONs@CS were designed and fabricated. • Chitosan formed the pH-responsive "gate" of CI@D-MONs@CS. • CI@D-MONs@CS exhibited significantly enhanced and durable antibacterial capacities. • CI@D-MONs@CS greatly reduced the off-odor caused by the axillary bacteria. • Application of CI@D-MONs@CS was a new and effective strategy to the axillary odor problem. [ABSTRACT FROM AUTHOR]

A facile construction of Ru/RuO 2 composite with porous reticular structure (denoted as Ru/RuO 2 -PRS) by controllable pyrolysis of Ru3+ coordinated cyanoguanidine was presented for oxygen evolution reaction (OER). The Ru/RuO 2 heterostructure was identified in Ru/RuO 2 -PRS. Taking the advantages of the Ru/RuO 2 heterostructure and large specific surface area, Ru/RuO 2 -PRS exhibits much more improved OER activity with much lower onset potential and overpotential to reach the current density of 10 mA cm−2 compared with RuO 2 porous powder and RuO 2 nano-particles counterparts in both acidic and alkaline solution. Specifically, Ru/RuO 2 -PRS exhibits much improved durability because the unique Ru/RuO 2 heterostructure relieves the dissolution of RuO 2 at high anodic potential that has been the bottleneck of Ru-based catalysts for OER, especially in acidic electrolyte. This study provides a new strategy to promote the OER application in acidic solution. • We present a facile one-step calcination method to synthesize 3D porous reticular structure of Ru/RuO 2 (Ru/RuO 2 -PRS). • The as prepared Ru/RuO 2 -PRS presents abundant Ru/RuO 2 heterostructure, which benefits to the electrocatalytic process. • Ru/RuO 2 -PRS exhibits excellent OER activity and stability in both acid and alkaline electrolyte. [ABSTRACT FROM AUTHOR]

The pathogenesis of acute lung injury (ALI) involves various mechanisms, such as oxidative stress, inflammation, and epithelial cell apoptosis. However, current drug therapies face limitations due to issues like systemic distribution, drug degradation in vivo , and hydrophobicity. To address these challenges, we developed a pH-responsive nano-drug delivery system for delivering antioxidant peptides to treat ALI. In this study, we utilized low molecular weight chitosan (LMWC) and hyaluronic acid (HA) as carrier materials. LMWC carries a positive charge, while HA carries a negative charge. By stirring the two together, the electrostatic adsorption between LMWC and HA yielded aggregated drug carriers. To specifically target the antioxidant drug WNWAD to lung lesions and enhance therapeutic outcomes for ALI, we created a targeted drug delivery system known as HA/LMWC@WNWAD (NPs) through a 12-h stirring process. In our research, we characterized the particle size and drug release of NPs. Additionally, we assessed the targeting ability of NPs. Lastly, we evaluated the improvement of lung injury at the cellular and animal levels to investigate the therapeutic mechanism of this drug targeting delivery system. [ABSTRACT FROM AUTHOR]

Systemic cancer therapy is always accompanied with toxicity to normal tissue, which has prompted concerted efforts to develop precise treatment strategies. Herein, we firstly develop an approach that enables spatiotemporally controlled formation and rotation of magnetic nanochains in vivo, allowing for precise mechanotherapy of tumor. The nanochain comprised nanocomposites of pheophorbide‐A (PP) modified iron oxide nanoparticle (IONP) and lanthanide‐doped down‐conversion NP (DCNP). In a permanent magnetic field, the nanocomposites would be aligned to form nanochain. Next, MnO2 NPs were subsequently administered to accumulate in tumor as suppliers of Mn2+, which coordinates with PP to immobilize the nanochain. In a rotating magnetic field, the nanochain would rapidly rotate, leading to apoptosis/necrosis of tumor cell. The nanochain showed high T2‐MR and NIR‐II fluorescence imaging signals, which facilitated guided therapy. The strategy has great potential in practical applications. [ABSTRACT FROM AUTHOR]

Systemic cancer therapy is always accompanied with toxicity to normal tissue, which has prompted concerted efforts to develop precise treatment strategies. Herein, we firstly develop an approach that enables spatiotemporally controlled formation and rotation of magnetic nanochains in vivo, allowing for precise mechanotherapy of tumor. The nanochain comprised nanocomposites of pheophorbide‐A (PP) modified iron oxide nanoparticle (IONP) and lanthanide‐doped down‐conversion NP (DCNP). In a permanent magnetic field, the nanocomposites would be aligned to form nanochain. Next, MnO2 NPs were subsequently administered to accumulate in tumor as suppliers of Mn2+, which coordinates with PP to immobilize the nanochain. In a rotating magnetic field, the nanochain would rapidly rotate, leading to apoptosis/necrosis of tumor cell. The nanochain showed high T2‐MR and NIR‐II fluorescence imaging signals, which facilitated guided therapy. The strategy has great potential in practical applications. [ABSTRACT FROM AUTHOR]

Exploring multifunctional sulfur host materials with high immobilization ability and catalytic activity is of great significance for realizing high-performance Lithium-sulfur (Li–S) batteries. Recently, cellulose nanocrystals (CNCs) receive extensive attention for advanced energy storage applications owing to their intrinsically exceptional physical/chemical properties and natural abundance. Herein, a highly dispersed cobalt clusters/nanoparticles embedded into CNC derived carbon aerogel composite (CA/Co-2) is for the first time synthesized. Benefiting from the interconnected hierarchical porous structure, homogeneously anchored Co clusters/nanoparticles and N-doped species, the designed CA/Co-2 could enable rapid electron/ion transport, efficient sulfur utilization, effective suppression of the shuttle effect and fast catalytic conversion of polysulfides, thereby contributing to outstanding electrochemical performance. Consequently, CA/Co-2@S cathode delivers high initial discharge capacity (1553.1 mAh g−1 at 0.1C) and superior cycle stability. Moreover, a remarkable rate performance of 681.4 mAh g−1 at 5.0C and exceptional long-term cycling stability with an ultralow capacity decay of 0.028 % per cycle at 5.0C over 1000 cycles could be achieved when coupled with carbon paper interlayer. This work develops a workable strategy for fabricating multifunctional sulfur host derived from the fascinating bio-nanomaterial of CNC, which provides valuable guidance for the future design of high-performance Li–S batteries. [Display omitted] • Highly dispersed Co clusters/nanoparticles embedded in cellulose nanocrystal derived carbon aerogel (CA) was fabricated. • CA/Co-2@S exhibited superior rate capability and outstanding cycling stability. • CA/Co-2@S coupled with carbon paper interlayer delivered ultralow decay rate of 0.028 % per cycle (1000 cycles) at 5C. • Well-dispersed Co species and hierarchical CA synergistically enhanced performance. [ABSTRACT FROM AUTHOR]

The stability and release of iRGD-modified RBCm nanoparticles loaded with Jug and Oxa (RBCm-(Jug, Oxa)-iRGD-NPs) were evaluated by Dynamic light scattering (DLS) and ultraviolet spectrophotometer, respectively. The current study demonstrated that RBCm-(Jug, Oxa)-iRGD-NPs had a drug-release profile similar to RBCm-(Jug, Oxa)-NPs, but were more stable. Keywords: Juglone; Oxaliplatin; nanoparticles; iRGD; colorectal cancer EN Juglone Oxaliplatin nanoparticles iRGD colorectal cancer 1301 1316 16 01/25/22 20220201 NES 220201 Poor solubility and non-specific biological distribution are critical obstacles for applying Juglone (Jug) into clinical practice. [Extracted from the article]

Transition metal phosphides (TMPs) have considered as excellent electrocatalysts with high reactivity for hydrogen evolution reaction (HER). While electro-catalytic properties of TMPs are restricted by uneven dispersion, small surface area, poor conductivity, and unsatisfied stability. Herein, a facile procedure was proposed to prepare a hierarchical structure of FeCoP nanoparticles anchored on N-doped carbon/multi-walled carbon nanotubes (NC/CNT) nanocomposites. With the increased porosity and conductive network of NC/CNT substrate, the as-synthesized NC/CNT-FeCoP provided abundant active sites for HER. Meanwhile, due to the synergistic effect between the dual metal centers and uniform distribution of bimetallic composites, the synthesized electrocatalyst can provide enhanced intrinsic activity. Therefore, the optimized NC/CNT-FeCoP delivered excellent HER activity in 1.0 M KOH and 0.5 M H 2 SO 4 with overpotentials of 182 mV and 150 mV at 10 mA cm−2, respectively. Moreover, NC/CNT-FeCoP coupled two-electrode system needs a low cell potential of 1.68 V at 10 mA cm−2 for overall water splitting. First-principle calculations indicated that N-doped graphene substrate can adjust the electronic properties of surface metal site and consequently affect the H adsorption strength to yield an improved HER activity. Our work demonstrated that the combination of mesoporous conductive matrices with bimetallic phosphides could greatly improve the HER efficiency for electrocatalysis. [Display omitted] • FeCoP nanoparticles were uniformly anchored on N-doped carbon foam/CNT nanocomposite. • NC/CNT-FeCoP exhibits excellent HER activity in both alkaline and acid solution. • Carbon foam can improve the cycle stability for FeCoP. • A low cell potential of 1.68 V at 10 mA cm− 2 was obtained for overall water splitting. [ABSTRACT FROM AUTHOR]

• Rod-like Nb 26 M o4 O 77 nanoparticles is fabricated by a facile hydrothermal reaction. • Nb 26 M o4 O 77 with an ordered intergrowth ReO 3 structure are favor to the structural stability and Li+ deintercalation. • Rod-like Nb 26 M o4 O 77 nanoparticles show the improved electrochemical properties as an anode for lithium-ion batteries. [Display omitted] As a branch of intercalation type niobium-based anodes for lithium-ion batteries, Nb 26 Mo 4 O 77 samples are synthesized by hydrothermal and solid-state method, respectively, while the structure and lithium-ion storage characteristics are studied in depth. Nb 26 Mo 4 O 77 belongs to a monoclinic phase with ordered intergrowth ReO 3 structure, which is constructed by a mixture of (Nb/Mo)O 6 octahedra blocks of 3 × 4 × ∞ and 4 × 4 × ∞ occurring in alternate sequence and linked by MoO 4 tetrahedra, favoring to the structural stability during the rapid lithium-ion deintercalation. Compared to agglomerated Nb 26 Mo 4 O 77 microparticles synthesized via solid-state process, rod-like nanoparticles synthesized by hydrothermal method with the high specific surface area and reaction reactivity exhibit an improved initial coulombic efficiency (89.3%), notable cyclability (203 mAh g−1 after 503 cycles at 0.5 C), significant intercalation pseudocapacitive contribution (82.2% at 0.9 mV s−1) and increased rate capability (107 mAh g−1 at 10 C). These results provide some new supplements for the improvement of niobium-based anodes. [ABSTRACT FROM AUTHOR]