Mixed-phase BiVO 4 nanosheet achieving enhanced photoelectrocatalytic performance

Micro & nano letters

article

Yi Wang¹  Junqi Li¹  Liu Guo¹  Beiyi Zhang¹  Wenfei Hou¹  Xiaotao Xu¹ 

[1]School of Materials Science and Engineering, Shaanxi University of Science and Technology

关键词: photoconductivity;    nanofabrication;    photoelectrochemistry;    X-ray diffraction;    electron-hole recombination;    semiconductor materials;    nanostructured materials;    semiconductor growth;    bismuth compounds;    photocatalysts;    photocatalysis;    surface chemistry;    electrocatalysis;    electrocatalysts;    crystal growth from solution;    crystal microstructure;    Raman spectra;    crystal structure;    ethylene glycol;    mixed-phase BiVO4 nanosheet;    photoelectrocatalytic performance;    solvents;    hydrothermal method;    viscosity;    homogeneous thin nanosheet;    microstructure;    deionised water;    XRD;    Raman diagrams;    photocurrent density;    electron transport resistance;    specific surface area;    orthorhombic BiVO4;    monocline BiVO4;    heterogeneous junction;    photogenerated carrier separation;    photogenerated electron–hole recombination;    BiVO4;   

DOI  :  10.1049/mnl.2019.0726

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

The mixed-phase BiVO 4 nanosheet with different ratios of solvents was prepared by a one-step hydrothermal method. The viscosity of ethylene glycol helps form a homogeneous thin nanosheet, which can be compared with the microstructure of BiVO 4 with different ratios of solvents (deionised water and ethylene glycol). Also, both XRD and Raman diagrams indicate that the synthesis of BiVO 4 nanosheet constitutes with a mixture of two crystal types. The mixed-phase BiVO 4 possesses higher photocurrent density, smaller electron transport resistance and longer lifetime. Enhanced photoelectrochemical performance can be attributed to the mixed-phase BiVO 4 has a large specific surface area, as well as o-BiVO 4 (orthorhombic BiVO 4 ) and s-BiVO 4 (monocline BiVO 4 ), form heterogeneous junction to promote photogenerated carries separation and reduce the recombination of photogenerated electron–hole.

【 授权许可】

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