ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zuobo Yang,Xiaokuan Wu,Leilei Cai,Jimmy Yun,Jie Zhang,Xin Liang,Hong Zhao
Proton-exchange membrane water electrolysis (PEMWE) holds great promise for hydrogen production applications. However, the reliance of PEMWE membrane electrodes on high loadings of expensive iridium poses a significant barrier to their commercial viability. Therefore, the development of high-performance oxygen evolution catalysts with a low iridium content is of critical importance. In this research, a porous antimony tin oxide (ATO) conductive support with a particle assembly aggregate structure was fabricated by a carbon template removal method. ATO-supported IrO2 exhibits significantly improved oxygen evolution reaction (OER) activity, with a much lower overpotential compared to the unsupported IrO2 catalyst. Moreover, it achieves 1.8 V at 2 A cm–2 with an ultralow loading of iridium (0.3 mgIr cm–2) for the proton-exchange membrane electrolyzer. Characterization techniques and density functional theory calculations have elucidated that the enhanced performance is attributed to the porous morphology of ATO and the strong metal oxide–support interaction between IrO2 and the ATO support. These findings validate the practicality of conductive nanostructured antimony-tin-oxide-supported catalysts for PEMWE applications and offer a pathway for the design of low-Ir OER catalysts.
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Runqing Liu,Hongping Wu,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
KBe2BO3F2 (KBBF) is the sole nonlinear optical (NLO) crystal that can practically generate deep-ultraviolet (UV) coherent light by a direct second-harmonic generation (SHG) process. However, the toxic BeO and crystal layer habit limit its application. With this background, a new beryllium-free borate, K5Mg2La3(BO3)6 (KMLBO), has been designed and synthesized through a high-temperature solution method. KMLBO crystallizes into the noncentrosymmetric space group P31m (No. 157) and features a three-dimensional framework structure consisting of alveolate [LaBO3]∞ layers further tightly bound via interlayer [BO3]3– groups. KMLBO not only exhibits desirable performances including deep-UV transparency, large SHG (∼3.1 × KH2PO4), and phase-matchability but also overcomes the crystal layer habit of KBBF, demonstrating that it is a potential deep-UV NLO crystal.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Yaodong Wang,Lijia Liu,Kexiao Sang,Yudan Wang,Chunhong Zhang,Hongxing Dong,Jianwei Bai
The application of asymmetric catalysis in industrial processes is limited by the high cost of chiral ligands and the difficulty associated with recovering precious metal catalysts. Here, based on a FeCl 3 -catalyzed Friedel–Crafts alkylation reaction, an aromatic amino acid was crosslinked with 4,4′-bis(chloromethyl)-1,1′-biphenyl to produce a novel porous chiral catalyst support, hypercrosslinked amino acid polymer (HCP-AA). Subsequently, metal catalysts were loaded on HCP-AA through the coordination of the metal ion with amino acid residues to generate heterogeneous asymmetric catalysts, HCP-AA-M. The resulting catalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The HCP-AA-M samples were employed to catalyze the heterogeneous asymmetric reaction, and they achieved high enantioselectivities (up to 99% ee). Meanwhile, the catalysts could be readily recovered through filtration, and they exhibited good recycling performances. The results suggested that the utilization of inexpensive amino acids as raw materials for producing porous chiral supports for recyclable high-performance asymmetric catalysts is an effective strategy.
研究领域:
有机化学
·
材料科学
·
催化化学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Shuai Liu,Zhen Pan,Ying Liang,Feng Li,Michael C. Breadmore,Min Zhang
An on-site ion analyzer based on capillary electrophoresis with pressure-driven flow through injection and capacitively coupled contactless conductivity detection has been developed for field monitoring of cations and anions in environmental waters. Automated time-pressure based hydrodynamic injection provides stable pL-nL scale injection (RSD = 1.96%, n = 30). A mixture of 400 mM Bis-Tris, 400 mM MOPS and 2 mM 18-crown-6 is used as the background electrolyte to provide repeatable separations. A proprietary hydrophilic coated 25 μm id capillary is used to suppress the electroosmotic flow. Separations of anions (Cl - , NO 3 - , NO 2 - , SO 4 2- , F - and PO 4 3- ) and cations (NH 4 + , K + , Na + , Ca 2+ and Mg 2+ ) are achieved by switching the polarity of the high voltage power supply in two individual runs. Signal fluctuations caused by the temperature or viscosity changes in on-site monitoring are corrected by on-line introduction of internal standards. RSDs of the migration time and the corrected peak height over ~35 h and 350 analysis cycles are <4.06%. The LODs of inorganic ions are in the range of 2.1 μM (K + ) to 6.8 μM (PO 4 3- ). The feasibility for on-site water monitoring with this system has been validated by a standard Ion chromatography method with comparable results obtained.
研究领域:
分析化学
·
环境科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2015
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IF 0.633
Haidong Liu,Yuan Li,Dongdong Wang,Yu Qin,Min Ji
A convenient route for the synthesis of Novartis's second-generation anaplastic lymphoma kinase inhibitor Ceritinib (LDK378) involving starting materials that are commercially available has been achieved. The procedure employed mild reaction conditions and avoided the use of expensive reagents compared to the original synthetic route reported by Novartis. More importantly, gram scale synthesis was accomplished and this protocol could be valid in drug discovery synthesis.
研究领域:
药物化学
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有机合成
·
肿瘤学
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DOI
高影响因子
MOLECULES
·
2018
·Vol. 23
·期 9
·2234
·
IF 3.098
Qingqiang Tian,Zongjie Gan,Xuetong Wang,Dan Li,Wen Luo,Huajun Wang,Zeshu Dai,Jianyong Yuan
A highly efficient and convenient protocol of imidazolium chloride (30 mol %) catalyzed amidation of amines with moderate to excellent yields was reported. The protocol shows broad substrate scope for aromatic, aliphatic, and heterocyclic primary amines.Keywords:imidazolium chloride;catalyst;primary amines;transamidation
研究领域:
有机化学
·
催化反应
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DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Shizhong Zhang,Chuanbiao Zhang,Yang Fu,Linhai Li,Chuanbing Huang,Yang Lin,Chongqin Zhu,Joseph S. Francisco,Zhiyuan He,Xin Zhou,Jianjun Wang
Ice affects many chemical reactions in nature, which greatly influences the atmosphere, climate, and life. However, the exact mechanism of ice in these chemical reactions remains elusive. For example, it is still an open question as to whether ice can act as a catalyst to greatly enhance the reactivity and selectivity, which is essential for the production of some natural compounds in our planet. Here, we discover that ice can lead to high efficiency and stereoselectivity of the [2 + 2] photodimerization of coumarin and its derivatives. The conversion of the [2 + 2] photodimerization of coumarins enhanced by ice is dozens of times higher than that in the unfrozen saturated solution, and the reaction displays a high syn-head-head stereoselectivity (>95%) in comparison with those in the absence of the ice. Note that almost no reaction occurs in the crystal powder and melt of the coumarins, indicating that the role of ice in the photodimerization reaction is not simply due to the usual mechanisms found in the freezing concentration. We further reveal that the reaction rate is found to be proportional to the total area of the ice surface and follows Michaelis–Menten-like kinetics, indicating that the ice surface catalyzes the reaction. Molecular dynamics simulations demonstrate that ice surfaces can induce reactants to form a two-dimensional liquid-crystal-ordered layer with a suitable intermolecular distance and unique side-by-side packing, facilitating stereoselective photodimerization for syn-head-head dimers. These findings give evidence that ice-surface-induced molecular assembly may play an important role in atmospheric heterogeneous photoreaction processes.
研究领域:
化学
·
环境科学
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Hongwei Luo,Qingping Du,Zuanjia Zhong,Yanbin Xu,Jinping Peng
Traditionally, toxicity of microplastics is ascribed to the chemicals adsorbed on them. However, microplastics can also interact with biomolecules, such as secretory proteins from aquatic organisms, and form protein-coated microplastics corona complex with unknown toxic effects. Here, we investigated the toxic effects of polystyrene microplastics (PS) and bovine serum albumin (BSA) coated PS corona complex (PS + BSA) on adult zebrafish ( Danio rerio ) intestines. The food intake ratio, accumulation and distribution of microplastics, histopathological changes, and molecular effects related to the antioxidant system in the intestine were studied. For the first time, we observed that PS + BSA aggregated on the inner surface of the zebrafish intestine, whereas PS dispersed. The aggregation of PS + BSA resulted in increased microplastics accumulation and longer residence time in the zebrafish intestine, which inhibited food intake and generated reactive oxygen species (ROS) in the intestine. Furthermore, the functions of the Keap1-Nrf2-ARE antioxidant signaling pathway and the activation of antioxidant enzymes were significantly affected by PS + BSA after a 21-day exposure. Ultimately, a higher accumulation of ROS and stronger inhibition of antioxidants led to more severe intestinal injury. These results suggest that the increased toxicity of protein-coated microplastics corona complex may be affected by oxidative damage and can result in the inhibition of digestion due to their aggregation and longer residence time in the intestine. Therefore, the ecological risk of microplastics may be underestimated owing to the interactive mechanisms of microplastics and protein coronas.
研究领域:
环境科学
·
毒理学
·
分子生物学
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DOI
PubMed
高影响因子
BIOMATERIALS
·
2021
·
IF 12.479
Zengjie Zhang,Yikai Wang,Wangsiyuan Teng,Xingzhi Zhou,Yuxiao Ye,Hao Zhou,Hangxiang Sun,Fangqian Wang,An Liu,Peng Lin,Wenguo Cui,Xiaohua Yu,Yan Wu,Zhaoming Ye
Tissue damage caused by hyperthermia during photothermal therapy (PTT) has largely limited its clinical applications for implant infection. However, rescue of tissue regeneration by conjugating orthobiologics with PTT has been problematic as they can easily deactivate biologics while eradicating bacteria. Herein, we report an orthobiologics-free strategy to synergistically couple photocatalytic antibacterial with pro-osteogenic capacity via self-assembly of copper sulphide nanoparticle (CuS NP) and reduced graphene oxide (rGO) on implant surface . This strategy not only offers enhanced photothermal effects for bacterial eradiation via near-infrared light (NIR), but also promotes vascularized osseointegration via cooperation of copper ion with rGO. In vitro and in vivo data showed that coupling CuS and rGO synergistically increased antibacterial efficacy of implants by 40 times and successfully destroyed bacterial biofilm upon NIR. Moreover, CuS/rGO decorated surface substantially improved bone marrow stromal cell adhesion , proliferation, as well as subsequent differentiation toward osteoblast. We also revealed that enhanced peri-implant vascularization may be attributed to the sustained release of copper ion from CuS NPs, which further collaborated with rGO to promote vascularized osseointegration. Altogether, this novel orthobiologics-free approach offers a practical alternative to circumvent the intrinsic drawbacks of PTT and endows powerful antibacterial and pro-osteogenic capacities for implant associated infections.
研究领域:
生物材料
·
纳米技术
·
生物医学工程
·
骨科
·
感染病学
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DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Wei Wei,Yong Zhu,Qiu Li,Zefeng Cheng,Yongji Yao,Qi Zhao,Pan Zhang,Xiaopeng Liu,Zhang Chen,Feng Xu,Yanfeng Gao
The development of a textile that cools skin both in sunshine and in room can not only protect the human body from a severely hot working environment but also save energy by lowering air conditioner load. Herein, we have developed a concept that combines solar energy reflection and “passive radiative cooling” for strengthening both solar energy blocking and heat dissipation through long-wave infrared (LWIR) radiation at wavelengths of 8–13 μm. The current technique is achieved by coating a textile with an Al 2 O 3 dispersed-cellulose acetate. Cellulose acetate possesses high emissivity in the LWIR region , which can promote effective LWIR radiation (2.5–25 μm). Al 2 O 3 has a high thermal conductivity (30–40 W m −1 K −1 ) and can enhance solar energy reflectivity . By coating Al 2 O 3 -cellulose acetate, solar energy reflectivity of the textile significantly increases from 62.6% to 80.1% (0.3–2.6 μm). A cooling performance experiment reveals that this modified textile can reduce the temperature of simulated skin by 2.3–8 °C compared to that of an unmodified reference. Furthermore, in a real-life cooling performance experiment, a modified T-shirt can avoid the overheating of actual human skin by 0.6–1.0 °C, corresponding to a temperature decrease by 1.9–3.3 °C for the internal surface of the textile. This work provides a method for the design and synthesis of radiative cooling textiles for personal thermal management.
研究领域:
材料科学
·
热管理技术
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DOI
高影响因子
Engineering
·
2022
·
IF 12.834
Xiao-Chang Xing,Yang Cao,Xiao-Yong Tian,Lingling Wu
Metamaterials have attracted increasing attention in recent years due to their powerful abilities in manipulating electromagnetic (EM) waves. However, most previously reported metamaterials are unable to actively control full-band EM waves. In this paper, we propose a thermo-tunable broadband metamaterial (T-TBM) using paraffin-based composites (PD-Cs) with different phase transition temperatures. Active control of the T-TBM reflection loss peaks from low to high frequency is realized by manipulating the solid–liquid state of the PD-Cs at different phase transition temperatures. The absorption peak bandwidth (where the reflection loss value is less than −30 dB) can be changed, while the broad bandwidth absorption (where the reflection loss value is less than −10 dB) is satisfied by adjusting the temperature of the T-TBM. It is shown that the stagnation of the phase transition temperature of the PD-Cs in the T-TBM provides a time window for actively controlling the EM wave absorption response under different thermal conditions. The device has a broad application prospect in the fields of EM absorption, intelligent metamaterials, multifunctional structural devices, and more.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2021
·
IF 9.147
Liang Yao,Jiang Xu,Liwei Zhang,Lei Liu,Lei Zhang
Generally, anthocyanin is extremely vulnerable when exposed to oxidants, alkaline, heat, and metallic ions in the ambient environment. In this research, we use an amphiphilic peptide of eighteen amino acids , named C6M1, to encapsulate anthocyanin by co-assembly mechanism. The representative size of anthocyanin-encapsulated peptide nanocomposites is less than 100 nm, with a high encapsulation efficiency of 77.06% and a maximum mass loading capability over 600 wt % (w/w). Particularly, we find that the co-assembly with anthocyanin causes a conformational change of the C6M1 peptide, switching from α-helical structure to β-sheet dominating structure, thus realizing the encapsulation of anthocyanin. The intermolecular interaction between C6M1 peptide and anthocyanin is further characterized via fluorescence quenching experiments. Moreover, stability enhancement of anthocyanin and physicochemical properties of the C6M1-anthocyanin nanocomposites are investigated quantitatively. Briefly, our results show that the C6M1 peptide greatly improves the tolerance of anthocyanin to increase of pH, metallic ions, and hot temperature; and maintains the intrinsic capacity of anthocyanin of scavenging free radicals .
研究领域:
食品科学
·
生物化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）