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Significance of Crystal Morphology Controlling in Semiconductor-Based Photocatalysis: A Case Study on BiVO<sub>4</sub> Photocatalyst

Yüe ZhaoState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, the Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Zhongshan Road 457, Dalian 116023, ChinaRengui LiDalian National Laboratory for Clean EnergyLinchao MuState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, the Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Zhongshan Road 457, Dalian 116023, ChinaCan LiState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, the Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Zhongshan Road 457, Dalian 116023, China

2017en

ABI

Annotatsiya

Precise control of the morphology and crystalline structure of semiconductor-based photocatalyst is crucial for improving the efficiency of solar energy conversion system. In this-work, taking BiVO4 semiconductor photocatalyst as an example, we investigated the-formation process for '"the regular.decahedron BiVO4 crystals prepared by a: convenient hydrothermal method and found that the synthesis is unctergoing a dissolutionrecrystallization process, concomitantly, the phase was transformed from tetragonal zircon type to nionoclinic sheelite type. By controlling the kinetics of crystal, growth-for BiVO4 through regulating acidity of r.the reaction' solution, we rationally tune the morphology Of monoclinic BiVQ(4) from regular decahedron Crystals to, short rod-like particles,.particularly precisely-modulate the proportion of {010}/{011}' faCets, for the decahedron BiVQ(4). By tuning the-crystalline, phase and morphOlogies of BlVO(4),crystal, we found that the photocatalytic water oxidation activity for the well-defined BiVO4 crystal with specific configuration of {010} and {011} exposed facets can be SQ times of tetragonal NA7.04 particles. Our work shows a convenient strategy for precise Control olthe growth process of semiconductor-based photocatalyst, based on the understanding 'of the crystal morphology evolution mechanism, which will be instructive for constructing semiconductor-based photocatalysts for solar energy conversion.

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DOI: 10.1021/acs.cgd.7b00291

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