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BiOI Nanosheets Grown by Chemical Vapor Deposition and Its Conversion to Highly Efficient BiVO4 Photoanode

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Chinese Journal of Chemistry 2017年第1期35卷 30-34页

作者： Ling Qian Chongwu Wang Aiping Chen Huagui Yang Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China

Bismuth vanadate （BiVO4） has been identified as one of the excellent visible-light-responsive photoanode for use in the photoelectrochemical water splitting. Recently intense research efforts have been devoted to the development of highly efficient BiVO4 photoanode. Herein, we reported a low-cost and scalable method for preparing nanostructured BiVO4 film. A much enhanced photocurrent （1.5 mAocm 2） was obtained for such film, which was 6.5 times higher than that of planar film at 1.23 V [vs. RHE （Reversible Hydrogen Electrode）]. The method provides an eco-friendly, reproducible and facile way to scale up on different substrates with attractive potential.

关键词： chemical vapor deposition bismuth vanadate photoelectrochemical water splitting highly efficient

Modulating MAPbI3 perovskite solar cells by amide molecules:Crystallographic regulation and surface passivation

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Journal of Energy Chemistry 2021年第5期30卷 179-185页

作者： Jin Xie Ziren Zhou Hongwei Qiao Mengjiong Chen Lijie Wang Shuang yang Yu Hou Huagui Yang Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

A controllable crystallization is of practical importance to produce high-quality perovskite thin films with reduced structural defects.Lewis bases as electron-pair donor chemicals can strongly coordinate to lead ions and have been extensively employed to manipulate the growth of perovskite crystals.In this work,we demonstrate a series of Lewis-base amides,for morphological regulation of methylammonium lead triiodide(MAPbI3)thin films.The screened acetamide was demonstrated to decently improve the grain size,along with a spatial distribution at grain boundaries(GBs).The mesostructured solar cells of acetamide-modified absorbers yielded an optimized power conversion efficiency(PCE)of 20.04%with a mitigated open-circuit voltage(V_(OC))deficit of 0.39 V.This work provides a facile and cost-effective strategy toward controllable fabrication of high-performance MAPbI3 solar cells.

关键词： Amide Methylammonium lead triiodide Crystallization Solar cell

维普期刊数据库

High-density oxygen-doped nano-TaN enables robust polysulfide interconversion in Li−S batteries

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中国化学快报:英文版 2023年第8期34卷 360-364页

作者： Shuang Yu Yonggui Zhang Shuo yang Kuikui Xiao Dong Cai huagui Nie Zhi yang Key Laboratory of Carbon Materials of Zhejiang Province Wenzhou UniversityWenzhou 325035China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035China

To tackle undesirable shuttle reaction and sluggish reaction kinetics in lithium–sulfur(Li–S)batteries,we develop a porous and high-density oxygen-doped tantalum nitride nanostructure(nano-TaNO)as an efficient catalyst through delicate tailoring.Benefiting from well-defined interior and surface nanopore channels,the nano-TaNO favors abundant sulfur storage,easy electrolyte infiltration and good electrons/Li+transport.More importantly,high-density O dopant in nano-TaNO not only provides high conductivity,but also promotes polysulfide adsorption/conversion via Li–O chemical interactions and the generation of S3∗−radicals to activate additional evolution path from S8 to Li_(2)S.Consequently,the nano-TaNObased cathode exhibits excellent specific capacity and cyclability even under high sulfur loading condition.These interesting findings suggest the great potential of tantalum nitride and a high amount of anion doping engineering in manipulating intermediates and building high-performance Li−S rechargeable batteries.

关键词： Lithium−sulfur batteries Polysulfide conversion O doping TaN High-density

维普期刊数据库

WO3 nanoflakes decorated with CuO clusters for enhanced photoelectrochemical water splitting

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Progress in Natural Science:Materials International 2018年第6期28卷 200-204页

作者： Chongwu Wang Jianfeng Tang Xinyu Zhang Ling Qian Huagui Yang Department Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology

The low quantum efficiency arising from poor charges transfer and insufficient light absorption is one of the critical challenges toward achieving highly efficient water splitting in photoelectrochemical cells. Three dimensions(3D) structures and heterojunctions have received intensive research interests recent years due to their excellent ability to separate photo-generated charges as well as the enhanced light harvesting property. Herein,3 D Cu O/WOstructure was fabricated through a facile solvothermal method followed by chemical bath deposition. The loading of Cu O clusters on WOnanoflake arrays results in a much improved photocurrent density compared with that of pristine WOnanoflake arrays, which reaches 1.8 m A/cm2 at 1.23 V vs. the reversible hydrogen electrode. The electrochemical impedance spectroscopy measurement demonstrates that the improved performance of Cu O/WOelectrode is attributed to the accelerated charge transfer kinetics as a result of the desirable band alignment in Cu O/WOheterojunction. This work demonstrates a facile strategy to construct superior WOelectrode, which will ultimately allow for efficient storage of solar energy into hydrogen.

关键词： Photoelectrochemistry Water splitting Tungsten trioxide photoanode CuO clusters Heterojunction

Deposition of SnO2 on the Anatase TiO2 {105} Facets with High Photocatalytic Performance

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Chinese Journal of Chemistry 2013年第12期31卷 1503-1507页

作者： Haibo Jiang Jun Xing Chongwu Wang Huagui Yang Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China Centre for Clean Environment andEnergy Gold Coast Campus Griffith University Queensland 4222 Australia

Anatase TiO2 as a promising photocatalyst has been widely employed in the decontamination treatment of polluted water, air purification and water splitting. Coupling TiO2 with other semiconductor materials could further enhance the photocatalytic activity. Here, we successfully synthesized the SnOz/TiO2 catalyst by depositing SnO2 particles on the anatase TiO2 {105} facets through a gas phase oxidation process. The SnOz/TiO2 catalyst shows higher photocatalytic activity for decomposition of MB than that of the pure YiO2 catalyst. The enhanced photo- catalytic activity can be attributed to the efficient charge separation since TiO2 and SnO2 catalyst have staggered energy level.

关键词： high-index facets SnOjTiO2 composite photocatalyst

Hydrophobic 1-octadecanethiol functionalized copper catalyst promotes robust high-current CO_(2) gas-diffusion electrolysis

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Nano Research 2022年第2期15卷 1393-1398页

作者： Liangyao Xue Xuefeng Wu Yuanwei Liu Beibei Xu Xuelu Wang Sheng Dai Pengfei Liu Huagui Yang Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Physics Department and Shanghai Key Laboratory of Magnetic Resonance School of Physics and Materials ScienceEast China Normal UniversityShanghai 200062China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool oj Chemistry and Molecular EngineeringEast China University of Science and Technology130 Meilong RoadShanghai 200237China

The electrocatalytic reduction of CO_(2) presents a promising strategy in addressing environmental and energy crisis.Significant progress has been achieved via CO_(2) gas diffusion electrolysis,to react at high selectivity and high rate.However,the gas diffusion layer(GDL)of the gas diffusion electrode(GDE)still suffers from low tolerance and limited active sites.Here,the hydrophobic 1-octadecanethiol molecular was functionalized over the Cu catalyst layer of the GDE,which simultaneously stabilizes the GDL and exposes abundant active solid-liquid-gas three-phase interfaces.The resultant GDE exhibits multi-carbon(C_(2+))product selectivity over faradaic efficiency(FE)of 70.0%in the range of 100 to 800 mA·cm^(-2),with the peak FE^(c2+)of 85.2%at 800 mA·cm^(-2).Notably,the strengthened GDE could continuously drive high-current electrolysis for more than 100 h without flooding.This work opens a new way to improve CO_(2) gas diffusion electrolysis via surface molecular engineering.

关键词： CO_(2)reduction reaction gas diffusion electrolysis multi-carbon products molecular engineering hydrophobicity

Remarkably enhanced water splitting activity of nickel foam due to simple immersion in a ferric nitrate solution

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Nano Research 2018年第8期11卷 3959-3971页

作者： Huajie Yin Lixue Jiang Porun Liu Mohammad AI-Mamun Yun Wang Yu Lin Zhong Huagui Yang Dan Wang Zhiyong Tang Huijun Zhao Centre for Clean Environment and Energy Gfiffith University Gold Coast Campus Queensland 4222 Australia Centre for Environmental and Energy Nanomaterials Institute of Solid State Physics Chinese Academy of Sciences Hefei 23003 China Huajie Yin and Lixue Jiang contributed equally to this work.

The development of a facile method to construct a high-performance electrode is of paramount importance to the application of alkaline water electrolysis. Here, we report that the activity of nickel foam （NF） towards the oxygen evolution reaction （OER） can be enhanced remarkably through simple immersion in a ferric nitrate （Fe（NOs）s） solution at room temperature. During this immersion process, the oxidation of the NF surface by NOs- ions increases the near-surface concentrations of OH- and Ni2＋, which results in the in situ deposition of a highly active amorphous Ni-Fe hydroxide （a-NiFeOxHy） layer. Specifically the OER overpotential of the NF electrode decreases from 371 mV （bare NF） to 270 mV （@10 mA-cm-2 in 0.1 M KOH） after immersion in a 20 mM Fe（NOs）s solution for just I min. A longer immersion time results in further increased OER activity （196 mV@10 mA,cm-2 in 1 M KOH）. The overall water splitting properties of the a-NiFeOxHy@NF electrode were evaluated using a two-electrode configuration. It is worth noting that the current density can reach 25 mA.cm-2 in 6 M KOH at an applied voltage of 1.5 V at room temperature.

关键词： oxygen evolution reaction water electrolysis corrosion hydroxide nickel foam

Uniform Formation of Amorphous Cobalt Phosphate on Carbon Nanotubes for Hydrogen Evolution Reaction

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Chinese Journal of Chemistry 2021年第8期39卷 2113-2118页

作者： Mengzhan Ge Xiaodong Zhang Shangzhou Xia Wenjie Luo Yuwei Jin Qianqian Chen huagui Nie Zhi yang Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouZhejiang 325027China AECC Hunan Aviation Powerplant Research Institute ZhuzhouHunan 412002China

Tremendous efforts have been made to the development of highly active,stable hydrogen evolution reaction(HER)electrocatalysts based on earth-abundant metal compounds.Recently,cobalt phosphorus(Co-P)catalysts have rece... 详细信息

关键词： Cobalt phosphate Heteroge neous catalysis Carb on nano tubes Electrochemistry Water splitting

Fe3O4 Modified Up-Conversion Luminescent Nanocrystals for Biological Applications

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Chinese Journal of Chemistry 2012年第12期30卷 2774-2778页

作者： Hou Yu Yin Zifei Xin Hailiang Su Yonghua yang huagui Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China Department of Traditional Chinese Medicine Changhai Hospital The Second Military Medical University Shanghai 200433 China

Magnetic-luminescent nanocomposites have obtained a great deal of attention due to their potential applications in magnetic separation of cells, magnetic resonance imaging and luminescence imaging, and so on. Herein, a new and facile two-step synthetic strategy was developed to prepare magnetic Fe304 modified single crystalline up- conversion luminescent NaYF4： Yb3＋, Er3＋ nanocrystals using Fe304 nanoparticles as the seeds. Acting as the ＂nu- clei＂ in the reaction, the presence of Fe304 nanoparticles facilitates the formation of up-conversion NaYF4： Yb3＋, Er3＋ nanocrystals on their surfaces through heterogeneous nucleation process. The structure and properties of these multifunctional nanocrystals were characterized by transmission electron microscope （TEM）, X-ray photoelectron spectroscopy （XPS）, photo luminescence （PL） and X-ray diffraction （XRD）. The results revealed that the as-prepared multifunctional nanocrystals show dual distinct properties of up-conversion fluorescent and superpara- magnetism, which were cubic in shape and very uniform in size with an average size ranging 30m40 nm. These unique functionalities could be very attractive for biological systems, and some biological applications such as cell- labelling were also demonstrated.

关键词： up-conversion luminescent Fe3O4 modified heterogeneous nucleation biological application