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

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

Amorphous ferric oxide as a hole-extraction and transfer layer on nanoporous bismuth vanadate photoanode for water oxidation

引用

Chinese Journal of Catalysis 2017年第6期38卷 1045-1051页

作者： Ling Qian Pengfei Liu Le Zhang Chongwu Wang Shuang Yang Lirong Zheng 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 Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

An amorphous ferric oxide layer was prepared on a bismuth vanadate *** resulted in improved charge carrier separation and surface catalytic performance compared with the photoanode without the oxide *** photocurrent of the oxide‐layer‐containing photoanode was2.52mA/cm2at1.23V versus the reversible hydrogen electrode,in potassium phosphate buffer,(0.5mol/L,pH=7.0).The amorphous ferric oxide layer on the photoanode contained low‐valence‐state iron species(FeII),which enabled efficient hole extraction and transfer.

关键词： Ferric oxide layer Amorphous bismuth vanadate Photoanode Oxygen evolution

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 *** powders were synthesized by a sol-gel method,and its photocatalytic performance was investigated under different Ag environments in this *** experimental data obtained were tested by X-ray diffraction(XRD),UV/vis scanning spectrophotometer,Fourier transform infrared spectra(FTIR) *** decolorization rate of MO was researched by AgO loading and Ag(NO)used as electron *** 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

Enhanced Photocatalytic Properties of Silver Oxide Loaded bismuth vanadate

引用

Chinese Journal of Chemical Engineering 2014年第8期22卷 909-913页

作者：单连伟米金波董丽敏韩志东刘波 Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province College of Chemical and Environmental EngineeringHarbin University of Science and Technology College of Material Science and Engineering Harbin University of Science and TechnologyKey Laboratory of Materials Research and Application of Heilongjiang Province

In this work, BiV04 powders were synthesized by a sol-gel method, and the BiV04 gels with different calcination temperature were investigated by X-ray diffraction （XRD）. Absorption range and band gap energy, which are respon- sible for the observed photocatalyst behavior, were investigated by UV/vis diffuse reflectance spectroscopy （DRS） for pure and silver oxide loaded BiV04. Pbotocatalytic properties of the prepared samples were examined by studying the degradation of the methyl orange. When using NaCI02 as an electron acceptor, the possible photocatalytic mech- anism has been discussed by photocatalytic reactions. With the help of electron acceptor, the results show clearly that the BiV04 loaded silver oxide exhibited superior photocatalytic activity in simulated dye wastewater treatment.

关键词： bismuth vanadate Photocatalytic properties Sol-gel method

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

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 *** 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 ***,a crystal facet engineering of TiO_(2) nanostructures is proposed to control band structures for the hole blocking layer of BiVO4 *** 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 *** BiVO4/TiO_(2) NFs showed 4.8 times higher photocurrent density than the BiVO4/TiO_(2) *** 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) *** 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 ***,we design a nanoporous MoO_(3−x)/BiVO_(4)heterojunction photoanode to promote charge *** 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 *** optimized MoO_(3−x)/BiVO_(4)heterojunction photoanode exhibits a photocurrent density of 5.07 mA·cm^(−2)for Na_(2)SO_(3)*** 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 *** 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

Spontaneous photoelectric field-enhancement effect prompts the low cost hierarchical growth of highly ordered heteronanostructures for solar water splitting

引用

Nano Research 2016年第6期9卷 1561-1569页

作者： Yankuan Wei Jinzhan Su XiaokangWan Liejin Guo Lionel Vayssieres International Research Center for Renewable Energy State Key Laboratory for Multiphase Flow in Power Engineering School of Energy &Power Engineering Xi'an Jiaotong University Xi'an 710049 China

In this study, a potentially universal new strategy is reported for the large-scale, low-cost fabrication of visible-light-active highly ordered heteronanostructures based on the spontaneous photoelectric-field-enhancement effect inherent in pyramidal morphology. The hierarchical vertically oriented arrayed structures comprise an active molecular co-catalyst at the apex of a visible-light-active large band gap semiconductor for low-cost solar water splitting in a neutral aqueous medium without the use of a sacrificial agent.

关键词： bismuth vanadate co-catalysts photocatalysis solar water splitting oxygen evolution

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 *** 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 *** 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

Efficient visible light photodegradation of BiVO_(4):Yb^(3+)/Tm^(3+)with high content of tetragonal phase

引用

Frontiers of Chemical Science and Engineering 2024年第11期18卷 135-149页

作者： Han Xie Mitang Wang Zhigao Sun Xiaoyu Lu Dongliang Zhang Siqingaowa Jin Siheng Chen School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

In photocatalytic studies,tetragonal bismuth vanadate(t-BiVO_(4))is not promising due to its wide band ***,according to previous studies,the tetragonal phase is inevitable when the monoclinic bismuth vanadate(m-BiVO_(4))is ***,it is necessary to find ways to improve the photoresponse and photocatalytic ability of t-BiVO_(4)under visible *** this study,Yb^(3+)and Tm^(3+)co-doped BiVO_(4)was synthesized by a simple hydrothermal method,and its microstructure,morphology and optical properties were characterized and analyzed by scanning electron microscope,transmission electron microscopy,Brunauer-Emmett-Teller,X-ray diffraction,Raman,X-ray photoelectron spectroscopy,diffuse reflectance spectra,photoluminescence,upconversion luminescence and other *** results show that BiVO_(4):Yb^(3+)/Tm^(3+)(BVYT)has a high content of tetragonal phase(about 80%),showing the characteristics of t-BiVO_(4).BVYT shows a higher separation efficiency of photogenerated carriers,its transient photocurrent response intensity increased by about 3 times,and the photocatalytic efficiency is significantly improved compare with the undoped m-BiVO_(4).Under simulated sunlight,BVYT completely degraded methylene blue(MB)solution and rhodamine B solution in 45 and 90 min,respectively,and the reaction rate was significantly *** also shows excellent photocatalytic ability under visible light,about 35%of MB solution was degraded within 45 min under visible light irradiation(>420 nm),this is because Yb^(3+)effectively promotes the upconversion luminescence of Tm^(3+)in response to visible light,and the energy cycle mechanism of Yb-Tm-Tm is ***,BiVO_(4)with high content of tetragonal phase has excellent photoactivity,even exceeding m-BiVO_(4).This is a novel discovery in the field of photocatalysis,which provides a broader application prospect for BiVO_(4)in photocatalysis.

关键词： photocatalysis bismuth vanadate rare earth upconversion luminescence

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

Bias-Free Solar-to-Hydrogen Conversion in a BiVO_(4)/PM6:Y6 Compact Tandem with Optically Balanced Light Absorption

引用

Energy & Environmental Materials 2024年第4期7卷 231-238页

作者： Catarina G.Ferreira Constanza Sansierra Francisco Bernal-Texca Mingyu Zhang Carles Ros Jordi Martorell ICFO-Institut de CiAencies FotAoniques The Barcelona Institute of Science and TechnologyCastelldefels 08860BarcelonaSpain Departament de FAısica Universitat PolitAecnica de CatalunyaTerrassa 08222Spain

The high voltage required to overcome the thermodynamic threshold and the complicated kinetics of the water splitting reaction limit the efficiency of single semiconductor-based photoelectrochemistry.A semiconductor/solar cell tandem structure has been theoretically demonstrated as a viable path to achieve an efficient direct transformation of sunlight into chemical ***,compact designs exhibiting the indispensable optimally balanced light absorption have not been *** the current work,we design and implement a compact tandem providing the complementary absorption of a highly transparent BiVO_(4)photoanode and a PM6:Y6 solar *** bandgap combination approaches the optimal to reach the solar-to-hydrogen(STH)conversion upper limit for tandem photoelectrochemical cells(PECs).We demonstrate that,by using a photonic multilayer structure to adequately balance sunlight absorption among both tandem materials,a 25%increase in the bias-free STH conversion can be achieved,setting a clear path to take compact tandem PECs to the theoretical limit performance.

关键词： bismuth vanadate compact tandem organic solar cells photonic multilayers solar-to-hydrogen conversion

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：