Facile synthesis of Se/BiVO 4 heterojunction composite and evaluation of synergetic reaction mechanism for efficient pho
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Facile synthesis of Se/BiVO4 heterojunction composite and evaluation of synergetic reaction mechanism for efficient photocatalytic staining of organic dye pollutants in wastewater under visible light Muhammad Munir Sajid1,* , Sadaf Bashir Khan3,4, Yasir Javed5, Nasir Amin6, Naveed Akhtar Shad6, Zhengjun Zhang7, and Haifa Zhai1,2,* 1
Henan Key Laboratory of Photovoltic Materials, School of Physics, Henan Normal University, Xinxiang 453007, China College of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, China 3 Institute for Advanced Study, Shenzhen University, Shenzhen 518060, Guangdong, China 4 Key Laboratory of Optoelectronic Devices, Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China 5 Department of Physics, University of Agriculture, Faisalabad 38000, Pakistan 6 Department of Physics, Government College University Allama Iqbal Road, Faisalabad 38000, Pakistan 7 Advanced Key Laboratory for New Ceramics, School of Materials Science & Engineering, Tsinghua University, Beijing 100084, China 2
Received: 30 April 2020
ABSTRACT
Accepted: 11 September 2020
The novel Se/BiVO4 heterojunction nanocomposites were successfully synthesized by facile hydrothermal method. The physical and chemical properties of photocatalyst samples were characterized by XRD, SEM, EDS, FTIR, XPS, BET, UV–Vis DRS, PL, EIS, and EPR techniques. The photocatalytic activity of Se/ BiVO4 was measured for the degradation of pollutant, Crystal Violet (CV) organic dye. It was observed that Se/BiVO4 photocatalyst with mole ratio 2:1 exhibited superior degradation of 98.69% of CV dye within 50 min using visible light. The electron paramagnetic resonance spectra show that OH radical being strong oxidizing agent is a major active agent species in the degradation of CV over Se/BiVO4@(2:1). The tremendous photo memory and stable nature of the Se/BiVO4 photocatalysts endorsed their usage as cost-effective photocatalysts for practical applications. Based on these results, the enhanced photocatalytic activities could be owed to the improved optical absorption and efficient separation and migration of photo-created charge carriers with the decreased recombination of electrons–holes resulting from composite effect. The possible photocatalytic mechanism of Se/BiVO4 was critically discussed based on the experimental results.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
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https://doi.org/10.1007/s10854-020-04487-0
J Mater Sci: Mater Electron
1 Introduction Nowadays, there is a continuously exploding global concern for handling environmental and energy crises. The model organic dyes (MB, MO, CR, CV, and RhB) utilized in textile and other industrial effluents have become an issue and have harmful effects for the environment and human health [1–3]. Therefore, many efforts have been made to fabricate highly efficient photocatalyst
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