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Visible light photocatalytic activity of BiVO4 particles with different morphologies
Institution:1. College of Chemistry, Key Laboratory of Preparation and Application of Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000, China;2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;1. Department of Physics, Bishop Heber College (Autonomous), Trichy 620017, Tamil Nadu, India;2. Department of Physics, Holy Cross College (Autonomous), Trichy 620002, Tamil Nadu, India;3. Photocatalysis International Research Centre (PIRC), Research Institute for Science & Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan;4. Department of Physics, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India;5. Department of Physics, Alagappa Chettiar College of Engineering and Technology, Karaikudi 630004, Tamil Nadu, India;1. Key Laboratory of Green Process and Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia;2. School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan 43900, Malaysia;3. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;4. School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong, China;5. Centre of Innovative Nanostructures & Nanodevices (COINN), Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Perak, Malaysia;1. Department of Chemistry, College of Science, Zhejiang Sci-Tech University, Hangzhou 310018, China;2. School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;3. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
Abstract:Bismuth vanadate (BiVO4) particles with different morphologies were synthesized by a one-step hydrothermal process and their optical and photocatalytic properties were investigated. Their crystal structure and microstructures were characterized using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). XRD patterns demonstrate that the as-prepared samples are monoclinic cell. FESEM shows that BiVO4 crystals can be fabricated in different morphologies by simply manipulating the reaction parameters of hydrothermal process. The UV–visible diffuse reflectance spectra (UV–vis DRS) reveal that the band gaps of BiVO4 photocatalysts are about 2.07–2.21 eV. The as-prepared BiVO4 photocatalysts exhibit higher photocatalytic activities in the degradation of rhodamine B (Rh B) under visible light irradiation (λ > 420 nm) compared with traditional N-doped TiO2 (N-TiO2). Furthermore, wheat like BiVO4 sample reveals the highest photocatalytic activity. Up to 100% Rh B is decolorized after visible light irradiation for 180 min. The reason for the difference in the photocatalytic activities for BiVO4 samples obtained at different conditions were systematically studied based on their shape, size and the variation of local structure.
Keywords:Bismuth vanadate  Spherical  Dumbbell like  Spindle like  Wheat like  Hydrothermal synthesis  Photocatalytic degradation
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