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A comparison study of alkali metal-doped g-C_3N_4 for visible-light photocatalytic hydrogen evolution

Chinese Journal of Catalysis 2017年第12期38卷 1981-1989页

作者： Jing Jiang Shaowen Cao Chenglong Hu Chunhua Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education School of Chemical and Environmental Engineering Jianghan University Wuhan 430056 Hubei China

Photocatalytic hydrogen production based on semiconductor photocatalysts has been considered as one of the most promising strategies to resolve the global energy *** carbon nitride(g‐C3N4)has been a star visible‐light photocatalyst in this field due to its various ***,pristine g‐C3N4usually exhibits limited ***,to enhance the performance of g‐C3N4,alkali metal ion(Li+,Na+,or K+)‐doped g‐C3N4are prepared via facile high‐temperature *** prepared samples are characterized and analyzed using the technique of XRD,ICP‐AES,SEM,UV‐vis DRS,BET,XPS,PL,TRPL,photoelectrochemical measurements,photocatalytic tests,*** resultant doped photocatalysts show enhanced visible‐light photocatalytic activities for hydrogen production,benefiting from the increased specific surface areas(which provide more active sites),decreased band gaps for extended visible‐light absorption,and improved electronic structures for efficient charge *** particular,because of the optimal tuning of both microstructure and electronic structure,the Na‐doped g‐C3N4shows the most effective utilization of photogenerated electrons during the water reduction *** a result,the highest photocatalytic performance is achieved over the Na‐doped g‐C3N4photocatalyst(18.7?mol/h),3.7times that of pristine g‐C3N4(5.0?mol/h).This work gives a systematic study for the understanding of doping effect of alkali metals in semiconductor photocatalysis.

关键词： g‐C3N4 Alkali metal doping Photocatalytic hydrogen production Visible light Charge transfer

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Impact of inherent energy barrier on spin-orbit torques in magnetic-metal/semimetal heterojunctions

arXiv

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arXiv 2019年

作者： Gao, Tenghua Qaiumzadeh, Alireza Troncoso, Roberto E. Haku, Satoshi An, Hongyu Nakayama, Hiroki Tazaki, Yuya Zhang, Song Tu, Rong Asami, Akio Brataas, Arne Ando, Kazuya Keio Institute of Pure and Applied Science Keio University Yokohama223-8522 Japan Department of Applied Physics and Physico-Informatics Keio University Yokohama223-8522 Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology TrondheimNO-7491 Norway School of Engineering and Sciences Universidad Adolfo Ibáñez Santiago Chile College of New Materials and New Energies Shenzhen Technology University Shenzhen518118 China Center for Spintronics Research Network Keio University Yokohama223-8522 Japan

Spintronic devices are based on heterojunctions of two materials with different magnetic and electronic properties. Although an energy barrier is naturally formed even at the interface of metallic heterojunctions, its impact on spin transport has been overlooked. Here, using diffusive spin Hall currents, we provide evidence that the inherent energy barrier governs the spin transport even in metallic systems. We find a sizable field-like torque, much larger than the damping-like counterpart, in Ni81Fe19/Bi0.1Sb0.9 bilayers. This is a distinct signature of barrier-mediated spin-orbit torques, which is consistent with our theory that predicts a strong modification of the spin mixing conductance induced by the energy barrier. Our results suggest that the spin mixing conductance and the corresponding spin-orbit torques are strongly altered by minimizing the work function difference in the heterostructure. These findings provide a new mechanism to control spin transport and spin torque phenomena by interfacial engineering of metallic heterostructures. Copyright © 2019, The Authors. All rights reserved.

关键词： Heterojunctions

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Heterogenised Molecular Catalysts for Sustainable Electrochemical CO2Reduction

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Angewandte Chemie 2022年第38期134卷

作者： Dr. Domenico Grammatico Andrew J. Bagnall Ludovico Riccardi Prof. Marc Fontecave Prof. Bao-Lian Su Prof. Laurent Billon Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles 5000 Namur Belgium Bio-inspired Materials Group: Functionality & Self-assembly Universite de Pau et des Pays de l'Adour E2S UPPA CNRS IPREM UMR 5254 64000 Pau France Present address: Energy Conversion and Hydrogen Center for Energy Austrian Institute of Technology GmbH Giefinggasse 2 1210 Vienna Austria Department of Chemistry Ångström Laboratories Uppsala University Box 523 751 20 Uppsala Sweden Laboratoire de Chimie et Biologie des Métaux Univ. Grenoble Alpes CNRS CEA IRIG 17 Rue des Martyrs 38054 Grenoble Cedex France Molecular Materials and Nanosystems Institute for Complex Molecular Systems Eindhoven University of Technology 5600 MB Eindhoven The Netherlands Laboratoire de Chimie des Processus Biologiques UMR CNRS 8229 Collège de France-CNRS-Sorbonne Université PSL Research University 11 Place Marcelin Berthelot 75005 Paris France State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China

There has been a rapid rise in interest regarding the advantages of support materials to protect and immobilise molecular catalysts for the carbon dioxide reduction reaction (CO 2 RR) in order to overcome the weaknesses of many well-known catalysts in terms of their stability and selectivity. In this Review, the state of the art of different catalyst-support systems for the CO 2 RR is discussed with the intention of leading towards standard benchmarking for comparison of such systems across the most relevant supports and immobilisation strategies, taking into account these multiple pertinent metrics, and also enabling clearer consideration of the necessary steps for further progress. The most promising support systems are described, along with a final note on the need for developing more advanced experimental and computational techniques to aid the rational design principles that are prerequisite to prospective industrial upscaling.

关键词： Carbon Dioxide Reduction Electrochemical Reduction Heterogenization Molecular Catalysts Solar Fuels

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Transform carbides（MxCy） into nanostructured functional materials

Transform carbides（MxCy） into nanostructured functional ma...

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第二届中国（国际）能源材料化学研讨会

作者： Zongkui Kou Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

A scalable fabrication of graphene and functional graphene with low cost is required emergently to promote applications of graphene-based materials and ***,for the first time we report a universal transformation of ab... 详细信息

关键词： MxCy Transform carbides into nanostructured functional materials

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P-doped Germanium Nanowires with Fanobroadening in Raman Spectrum

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Journal of Wuhan University of technology(materials Science) 2016年第1期31卷 52-57页

作者：何亮 xiong biao zhou peng luo wen song peishuai wang xukun hao zhimeng yang xiao niu chaojiang tian xiaocong yan mengyu 麦立强 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The optimized growth conditions for high density germanium（Ge） nanowires and P-doped Ge nanowires on Si（111） substrate were investigated,the phosphorus（P）-doping in Ge nanowires was also *** liquid solid-low pressure chemical vapor deposition（VLS-LPCVD） of Ge nanowires was conducted with different thicknesses of Au film as catalyst,different flow rates of GeH4 as precursor and PH3/Ar as *** morphologies of the Ge nanowires were characterized by scanning electron microscopy（SEM）,the P-doping was verified by micro Raman spectroscopy via measuring the P local vibrational peak（342-345 cm^（-1）） and asymmetric broadening of Ge-Ge vibrational peak（about 300 cm^（-1）,*** characterization results show that 1 run thickness of Au catalyst is the most suitable condition among thicknesses of 0.1,1,5,and 10 nm for the growth of high density Ge nanowires at 300 and 350℃,and 0.5 sccm is the best flow rate of PH3/Ar to grow high density and large scale P-doped Ge nanowires among flow rates of 0.5,1 and *** P impurity can be doped into Ge nanowires effectively during LPCVD process at 350 ℃.

关键词： germanium nanowires LPCVD doping VLS

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Fabrication of BiVO4：Effect of Structure and Morphology on Photocatalytic Activity and Its Methylene Blue Decomposition Mechanism

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Journal of Wuhan University of technology(materials Science) 2016年第4期31卷 791-798页

作者：郭敏娜 he qianglong wang wenjie wu jie 王为民 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

BiVO4 photocatalysts were synthesized by a surfactant free hydrothermal method without any further treatments,and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,ultraviolet-visible diffuse reflectance spectroscopy（UV-vis DRS）,Raman spectroscopy,and Brunauer-Emmett-Teller（BET） surface area *** photocatalytic activity was evaluated for the degradation of the methylene blue（MB） under visible light *** from the structural and morphological characterization,it is stated that the obtained samples present monoclinic phase,and the pH value has significant influence on the *** enhanced photocatalytic performance was associated with its crystallinity,unique morphology,band gap energy,BET specific surface area,surface charge and adsorption *** recycle experiments results show that the BiVO4 photocatalysts have excellent photo-stability,and we deduced a possible mechanism by examining the effects of the active species involved in the photocatalytic process for MB photocatalytic degradation.

关键词： photocatalytic surfactant hydrothermal visible crystallinity ultraviolet irradiation Brunauer tetragonal Teller

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Grain boundary engineering with nano-scale InSb producing high performance In_(x)Ce_(y)Co_(4)Sb_(12+z)skutterudite thermoelectrics

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Journal of Materiomics 2017年第4期3卷 273-279页

作者： Han Li Xianli Su Xinfeng Tang Qingjie Zhang Ctirad Uher G.Jeffrey Snyder Umut Aydemir State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Physics University of MichiganAnn ArborMI 48109USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA Department of Chemistry Koc UniversitySariyerIstanbul 34450Turkey

Thermoelectric semiconductors based on CoSb_(3)hold the best promise for recovering industrial or automotive waste heat because of their high efficiency and relatively abundant,lead-free constituent ***,higher efficiency is needed before thermoelectrics reach economic viability for widespread *** this study,n-type In_(x)Ce_(y)Co_(4)Sb_(12+z)skutterudites with high thermoelectric performance are produced by combining several phonon scattering mechanisms in a panoscopic *** melt spinning followed by spark plasma sintering(MS-SPS),bulk In_(x)Ce_(y)Co_(4)Sb_(12+z)alloys are formed with grain boundaries decorated with nano-phase of *** skutterudite matrix has grains on a scale of 100-200 nm and the InSb nano-phase with a typical size of 5e15 nm is evenly dispersed at the grain boundaries of the skutterudite *** with the presence of defects on the Sb sublattice,this multi-scale nanometer structure is exceptionally effective in scattering phonons and,therefore,InxCey-Co_(4)Sb_(12)/InSb nano-composites have very low lattice thermal conductivity and high zT values reaching in excess of 1.5 at 800 K.

关键词： Filled skutterudites Nanocomposite MS-SPS Thermoelectric properties

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Development and Clinical Application of Phosphorus-Containing Drugs

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Medicine in drug discovery 2020年 8卷 100063页

作者： Hanxiao Yu He Yang Enxue Shi Wenjun Tang State Key Laboratory of Bio-Organic and Natural Products Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences 345 Ling Ling Road Shanghai 200032 China. Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China. State Key Laboratory of NBC Protection for Civilian Beijing 102205 China. School of Chemistry and Material Sciences Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China.

Phosphorus-containing drugs belong to an important class of therapeutic agents and are widely applied in daily clinical practices. Structurally, the phosphorus-containing drugs can be classified into phosphotriesters, phosphonates, phosphinates, phosphine oxides, phosphoric amides, bisphosphonates, phosphoric anhydrides, and others; functionally, they are often designed as prodrugs with improved selectivity and bioavailability, reduced side effects and toxicity, or biomolecule analogues with endogenous materials and antagonistic endoenzyme supplements. This review summarized the phosphorus-containing drugs currently on the market as well as a few promising molecules at clinical studies, with particular emphasis on their structural features, biological mechanism, and indications.

关键词： Drug modification Phosphite, phosphate Phosphorus-containing drugs Prodrugs

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Effect of La_2O_3 content on wear resistance of alumina ceramics

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Journal of Rare Earths 2016年第3期34卷 288-294页

作者：吴婷婷周建吴伯麟李文杰 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology College of Materials Science and Engineering Guilin University of Technology

In order to improve the wear resistance, a kind of alumina ceramic with good wear resistance was created in an Al_2O_3-CaC_O3-SiO_2-MgO-La_2O_3（ACSML） system. The effects of La_2O_3 content on sintering temperature, bulk density, and wear rate were investigated. The wear rate of sample was as low as 0.0393‰. The wear resistance of the sample containing La_2O_3 has improved 43% than that of the sample without La_2O_3. Appropriate La_2O_3 doping could inhibit grain growth, enhance density, and purify grain boundary. La_2O_3 could diffuse into Al_2O_3 to form a solid solution and react with Al_2O_3 to form high-aluminum low-lanthanum complex oxides. The combination among Al_2O_3, the solid solution layer, and the layer of high-aluminum low-lanthanum complex oxides combined closely, which could improve grain boundary cohesion. Besides, the homogeneous distributions of elements made uniform structure. Finally, the wear resistance of alumina ceramic was improved.

关键词： alumina ceramic abrasive media lanthanum oxide wear resistance rare earths

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High-Performance Microbatteries: Recent Advances in High-Performance Microbatteries: Construction, Application, and Perspective (Small 39/2020)

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Small 2020年第39期16卷

作者： Zhe Zhu Ruyu Kan Song Hu Liang He Xufeng Hong Hui Tang Wen Luo State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan Hubei 430070 P. R. China Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA School of Materials and Energy University of Electronic Science and Technology of China Chengdu Sichuan 611731 P. R. China Department of Physics School of Science Wuhan University of Technology Wuhan Hubei 430070 P. R. China

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