检索结果-南通市图书馆

Tailoring morphology symmetry of bismuth vanadate photocatalysts for efficient charge separation

Science China Chemistry 2023年第12期66卷 3611-3619页

作者： Yuting Deng Hongpeng Zhou Chenwei Ni Fengke Sun Wenchao Jiang Ruotian Chen Wenming Tian Can Li Rengui Li State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Although spatial charge separation between different facets of semiconductor crystals has been recognized as a general strategy in photocatalysis, the vital role of crystal morphology symmetry in charge separation properties still remains elusive. Herein,taking monoclinic bismuth vanadate(BiVO_(4)) as a platform, we found distinct charge separation difference via rationally tailoring the morphology symmetry from octahedral to truncated octahedral crystals. For octahedral BiVO_(4), photogenerated electrons and holes can be separated between edges and quasi-equivalent facets. However, as for truncated octahedral crystals,photogenerated electrons tend to transfer to {010} facets while photogenerated holes prefer to accumulate on {120} facets, thus realizing the spatial separation of photogenerated charge between different facets. Morphology tailoring of BiVO_(4) crystals leads to a significantly improved photogenerated charge separation efficiency and photocatalytic water oxidation activity. The built-in electric field for driving the separation of photogenerated electrons and holes is considered to be modulated by tuning the morphology symmetry of BiVO_(4) crystals. This work discloses the significant roles of morphology symmetry in photogenerated charge separation and facilitates the rational design of artificial photocatalysts.

关键词： bismuth vanadate morphology symmetry tailoring photocatalysis spatial charge separation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Formation mechanism and photocatalytic properties of bismuth vanadate

Formation mechanism and photocatalytic properties of bismuth...

引用

第八届中国功能材料及其应用学术会议

作者： SHAN Lian-wei FANG Rui LI Wei DONG Li-min LIU Bo Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province College of Chemical and Environmental EngineeringHarbin University of Science and Technology Material Science and Engineering Department Harbin University of Science and TechnologyKey Laboratory of Materials Research and Application of Heilongjiang Province Material Science and Engineering Department Harbin University of Science and TechnologyKey Laboratory of Materials Research and Application of Heilongjiang Province

ISBN: (纸本)9783037859698

This study is focused on formation mechanism and photocatalytic properties of bismuth vanadate.BiVO powders were synthesized by a sol-gel method,and its photocatalytic performance was investigated under different Ag environments in this paper.The experimental data obtained were tested by X-ray diffraction(XRD),UV/vis scanning spectrophotometer,Fourier transform infrared spectra(FTIR) etc.The decolorization rate of MO was researched by AgO loading and Ag(NO)used as electron acceptor.The possible photocatalytic mechanism has been discussed by photocatalytic reactions.

关键词： bismuth vanadate photocatalytic properties sol-gel method

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Crystal Facet Engineering of TiO_(2) Nanostructures for Enhancing Photoelectrochemical Water Splitting with BiVO_(4) Nanodots

引用

Nano-Micro Letters 2022年第3期14卷 201-215页

作者： Mi Gyoung Lee Jin Wook Yang Hoonkee Park Cheon Woo Moon Dinsefa M.Andoshe Jongseong Park Chang‑Ki Moon Tae Hyung Lee Kyoung Soon Choi Woo Seok Cheon Jang‑Joo Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Department of Chemistry and Nanoscience Ewha Womans UniversitySeoul 03693Republic of Korea National Research Facilities and Equipment Center Korea Basic Science InstituteDaejeon 34133Republic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Republic of Korea

Although bismuth vanadate(BiVO4)has been promising as photoanode material for photoelectrochemical water splitting,its charge recombination issue by short charge diffusion length has led to various studies about heterostructure photoanodes.As a hole blocking layer of BiVO4,titanium dioxide(TiO_(2)) has been considered unsuitable because of its relatively positive valence band edge and low electrical conductivity.Herein,a crystal facet engineering of TiO_(2) nanostructures is proposed to control band structures for the hole blocking layer of BiVO4 nanodots.We design two types of TiO_(2) nanostructures,which are nanorods(NRs)and nanoflowers(NFs)with different(001)and(110)crystal facets,respectively,and fabricate BiVO4/TiO_(2) heterostructure photoanodes.The BiVO4/TiO_(2) NFs showed 4.8 times higher photocurrent density than the BiVO4/TiO_(2) NRs.Transient decay time analysis and time-resolved photoluminescence reveal the enhancement is attributed to the reduced charge recombination,which is originated from the formation of type II band alignment between BiVO4 nanodots and TiO_(2) NFs.This work provides not only new insights into the interplay between crystal facets and band structures but also important steps for the design of highly efficient photoelectrodes.

关键词： Crystal facet control bismuth vanadate Titanium dioxide Heterojunction Water splitting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nanoporous MoO_(3−x)/BiVO_(4)photoanodes promoting charge separation for efficient photoelectrochemical water splitting

引用

Nano Research 2022年第8期15卷 7026-7033页

作者： Songcan Wang Boyan Liu Xin Wang Yingjuan Zhang Wei Huang Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Owing to the relatively short hole diffusion length,severe charge recombination in the bulk of bismuth vanadate(BiVO_(4))is the key issue for photoelectrochemical water splitting.Herein,we design a nanoporous MoO_(3−x)/BiVO_(4)heterojunction photoanode to promote charge separation.The efficient electron transport properties of oxygen deficient MoO_(3−x)and the nanoporous structure are beneficial for charge separation,leading to a significantly enhanced PEC performance.The optimized MoO_(3−x)/BiVO_(4)heterojunction photoanode exhibits a photocurrent density of 5.07 mA·cm^(−2)for Na_(2)SO_(3)oxidation.By depositing FeOOH/NiOOH dual oxygen evolution cocatalysts to promote surface kinetics,a high photocurrent density of 4.81 mA·cm^(−2)can be achieved for PEC water splitting,exhibiting an excellent applied bias photon-to-current efficiency of 1.57%.Moreover,stable overall water splitting is achieved under consecutive light illumination for 10 h.We provide a proof of concept for the design of efficient BiVO_(4)-based heterojunction photoanodes for stable PEC water splitting.

关键词： water splitting bismuth vanadate heterojunction oxygen vacancies charge separation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Construction of BiVO_(4)/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance

引用

International Journal of Minerals,Metallurgy and Materials 2022年第11期29卷 1971-1980页

作者： Jiaxin Li Hao Yuan Wenjie Zhang Ruijie Zhu Zhengbo Jiao Institute of Materials for Energy and Environment College of Material Science and EngineeringQingdao UniversityQingdao 266071China

A Z-scheme heterostructure of Mo,W co-doped BiVO_(4)(Mo,W:BVO/BiOCl@C)was fabricated by a simple solid solution drying and calcination(SSDC)method.The heterostructure was characterized by X-ray diffraction(XRD),Fourier transform infrared(FTIR),X-ray photoelectron spectroscopy(XPS),etc.Under visible light irradiation,Mo,W:BVO/BiOCl@C heterostructure exhibits excellent photoelectrochemical capability compared with other as-prepared samples.The photocurrent density and the incident photon-to-electron conversion efficiency(IPCE)are about 5.4 and 9.0 times higher than those of pure BiVO_(4),respectively.The enhancement of the photoelectrochemical performance can be attributed to the construct of Z-scheme system,which is deduced from the radical trapping experiments.The Mo,W:BVO/BiOCl@C Z-scheme heterojunction enhances the visible-light absorption and reduces the recombination rate of charge carriers.This work provides an effective strategy to construct Z-scheme photoelectrodes for the application of photoelectrochemical water splitting.

关键词： photoelectrochemical bismuth vanadate BiOCl Z-scheme carbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Systematic engineering of BiVO4 photoanode for efficient photoelectrochemical water oxidation

引用

CARBON ENERGY 2023年第4期6卷 12-21页

作者： Liang, Zhiting Li, Meng Ye, Kai-Hang Tang, Tongxin Lin, Zhan Zheng, Yuying Huang, Yongchao Ji, Hongbing Zhang, Shanqing Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou Key Lab Clean Transportat Energy Chem Guangzhou 510006 Peoples R China Chem Engn Guangdong Lab Jieyang Branch Chem Jieyang Peoples R China Zhejiang Univ Technol Inst Green Petr Proc & Light Hydrocarbon Convers Coll Chem Engn State Key Lab Breeding Base Green Chem Synth Techn Hangzhou Peoples R China Griffith Univ Ctr Catalysis & Clean Energy Sch Environm & Sci Gold Coast Campus Southport Qld Australia Guangzhou Univ Inst Environm Res Greater Bay Area Key Lab Water Qual & Conservat Pearl River Delta Minist Educ Guangzhou 510006 Peoples R China

BiVO4 is one of the most promising photoanode materials for photoelectrochemical (PEC) solar energy conversion, but it still suffers from poor photocurrent density due to insufficient light-harvesting efficiency (LHE), weak photogenerated charge separation efficiency (f(Sep)), and low water oxidation efficiency (f(OX)). Herein, we tackle these challenges of the BiVO4 photoanodes using systematic engineering, including catalysis engineering, bandgap engineering, and morphology engineering. In particular, we deposit a NiCoOx layer onto the BiVO4 photoanode as the oxygen evolution catalyst to enhance the f(OX) of Fe-g-C3N4/BiVO4 for PEC water oxidation, and incorporate Fe-doped graphite-phase C3N4 (Fe-g-C3N4) into the BiVO4 photoanode to optimize the bandgap and surface areas to subsequently expand the light absorption range of the photoanode from 530 to 690 nm, increase the LHE and f(Sep), and further improve the oxygen evolution reaction activity of the NiCoOx catalytic layer. Consequently, the maximum photocurrent density of the as-prepared NiCoOx/Fe-g-C3N4/BiVO4 is remarkably boosted from 4.6 to 7.4 mA cm-2. This work suggests that the proposed systematic engineering strategy is exceptionally promising for improving LHE, f(Sep), and f(OX) of BiVO4-based photoanodes, which will substantially benefit the design, preparation, and large-scale application of next-generation high-performance photoanodes.

关键词： bismuth vanadate carbon nitride charge separation heterojunction water oxidation PERFORMANCE NANOSHEETS

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BiVO_(4),Bi_(2)WO_(6) and Bi_(2)MoO_(6) photocatalysis:A brief review

引用

Journal of Materials Science & Technology 2020年第21期56卷 45-68页

作者： Xintong Liu Shaonan Gu Yanjun Zhao Guowei Zhou Wenjun Li Key Laboratory of Fine Chemicals in Universities of Shandong School of Chemistry and Pharmaceutical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan273100China Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials University of Science and Technology BeijingBeijing100083China

In recent years,photocatalytic technologies have been extensively studied and diffusely used in water splitting,decomposition of organic pollutants,reduction of carbon dioxide,etc.As a type of eye-catching semiconductors,BiVO_(4),Bi_(2)WO_(6),and Bi_(2)MoO_(6) (denoted as BiaAOb)have become a hotspot in photocatalytic researches due to their crystal structure stability,high light quantum and electronic transmission efficiency,and outstanding energy utilization capacity.However,pristine BiaAOb(A=V,W,and Mo)possesses several drawbacks,such as low separation efficiency of photo-excited electron-hole pairs,low specific surface area,as well as the poor quantum utilization,which restrict their photocatalytic performance.Considerable efforts,such as nanostructure modification,surface engineering,and heterojunction/homojunction fabrication,have been conducted to solve these problems.This integrated review aims to sum up recent advances in current studies on fabrication of high efficiency BiaAOb photocatalysts to accelerate the developments of BiaAOb-based materials in the photocatalysis(PC)field.The current challenges and prospects of BiaAOb are emphasized which stretches the existing fundamental theories of PC as well as provide a promising strategy to fabricate high efficiency BiaAOb catalysts to control environmental pollution and assist the sustainable development of energy.

关键词： Photocatalyst bismuth vanadate Heterojunction Solar fuels

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Room-temperature photodeposition of conformal transition metal based cocatalysts on BiVO4 for enhanced photoelectrochemical water splitting

引用

Nano Research 2020年第1期13卷 231-237页

作者： Lu Wang Tao Zhang Jinzhan Su Liejin Guo International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringSchool of Energy&Power EngineeringXi’an Jiaotong UniversityXi’an710049China

Photoelectrochemical(PEC)water splitting using semiconductors offers a promising way to convert renewable solar energy to clean hydrogen fuels.However,due to the sluggish reaction kinetics of water oxidation,significant charge recombination occurred at the photoanode/electrolyte interface and cause decrease of its PEC performance.To reduce the surface recombination,we deposit different transition metal complexes on BiVO4 nanocone arrays by a versatile light driven in-situ two electrode photodeposition approach without applied bias.Conformal cobalt phosphate“Co-Pi”,nickel borate“Ni-Bi”and manganese phosphate“Mn-Pi”complexes were deposited on BiVO4 nanocone arrays to form core-shell structure photoanode,all of which lead to enhanced photoelectrochemical performance.The photocurrent of the Co-Pi/BiVO4 photoanode under front-side illumination for 5 min is increased by 4 folds comparing to that of bare BiVO4 photoanode at 0.6 V vs.RHE,reaching a hole transfer efficiency as high as 94.5%at 1.23 V vs.RHE.The proposed photodeposition strategy is simple and efficient,and can be extended to deposite cocatalyst on other semiconductors with a valence band edge located at a potential more positive than the oxidation potential of transition metal ion in the cocatalyst.

关键词： bismuth vanadate photoelectrochemcial water splitting conformal photodeposition cocatalyst

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Boosting carrier dynamics of BiVO_(4) photoanode via heterostructuring with ultrathin BiOI nanosheets for enhanced solar water splitting

引用

Journal of Materials Science & Technology 2021年第20期79卷 21-28页

作者： Can Li Fan Feng Jie Jian Youxun Xu Fan Li Hongqiang Wang Lichao Jia Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal University620 West Chang’an StreetXi’anShaanxi710119China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Labortary of GrapheneXi’an710072China

bismuth vanadate(BiVO_(4))has been one of the most promising candidates for solar water splitting while still suffers from poor bulk charge transport that limits its solar to hydrogen conversion efficiency.We demonstrate in this work an efficient strategy for boosting bulk charge transport of BiVO_(4) through the facile impregnation of as-prepared BiVO_(4) photoanode in the precursor solution of ultrathin BiOI nanosheets.Such impregnation creates increased oxygen vacancies in the bulk of BiVO_(4) through the reduction of V^(5+)to V^(4+)by I^(-),which greatly improves bulk separation efficiency for BiVO_(4)-BiOI up to 65.9%at 1.23 V_(RHE) from the original 51.9%of pure BiVO_(4).Moreover,the decoration of the BiOI nanosheets on BiVO_(4) photoanode is also beneficial for addressing the carrier dynamics at surface due to the matched energy levels of BiOI nanosheets and BiVO_(4).The introduced plenty of oxygen vacancies in the bulk of BiVO_(4) and the built-in electric field in BiVO_(4)-BiOI synergistically improve the photocurrent density at 1.23 V_(RHE) up to 3.88 mA cm^(-2).We believe that such facile impregnation strategy will pave an alternative way to the development of highly efficient BiVO_(4) photoanode.

关键词： bismuth vanadate BiOI nanosheets Heterojunction Solution impregnation Oxygen vacancy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transparent Co_(3)FeO_(x) Film Passivated BiVO_(4) Photoanode for Efficient Photoelectrochemical Water Splitting

引用

Chinese Journal of Structural Chemistry 2021年第11期40卷 1505-1512,1409页

作者：方明秦琪蔡倩刘伟 Fujian Normal University Fuzhou 350007China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Photoelectrochemistry that use semiconductors to absorb sunlight for water splitting provides an effective method for the development of renewable hydrogen energy in the future.In this paper,a transparent and highly-efficient cobalt-iron oxide(Co_(3)FeO_(x))nano-film was fabricated through hydrothermal method by directional adjustment of atomic ratio to promote the kinetics of BiVO_(4)(BVO)photoanode water oxidation.As a result,the Co_(3)FeO_(x)-modified BVO photoanode(Co_(3)FeO_(x)/BVO)exhibits an impressive photocurrent density of 4.0 mA·cm^(2) at 1.23 V versus reversible hydrogen electrode(RHE),approximately 2.17-fold higher than that of bare BVO,as well as a cathodically shifted onset potential of 320 mV.Transparent catalyst nanolayer structure is clarified by ultraviolet-visible spectroscopy.In addition,the Co_(3)FeO_(x)/BVO photoanode has better stability,and there is no obvious activity degradation after 10 hours of reaction.This strategy provides a broad prospect for the use of water oxidation co-catalyst to achieve effective water splitting.

关键词： photoelectrochemical water splitting bismuth vanadate co-catalyst cobalt-iron oxide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：