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Evaluating the photocatalytic efficiency of the BiVO4/rGO photocatalyst
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Document Title
Evaluating the photocatalytic efficiency of the BiVO4/rGO photocatalyst
Author
Phanichphant S., Nakaruk A., Chansaenpak K., Channei D.
Name from Authors Collection
Affiliations
Center of excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand; Department of Industrial Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, 65000, Thailand; National Nanotechnology Center, National Science and Technology Development Agency, Thailand Science Park, Pathum Thani, 12120, Thailand; Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
Type
Article
Source Title
Scientific Reports
ISSN
20452322
Year
2019
Volume
9
Issue
1
Open Access
Gold, Green
Publisher
Nature Publishing Group
DOI
10.1038/s41598-019-52589-5
Abstract
The present study reported the preparation of BiVO4 by co-precipitation method. The as-prepared BiVO4 photocatalyst were deposited on rGO sheets to form BiVO4/rGO via the hydrothermal method. The crystalline structure, morphological, optical properties, and surface properties of the synthesized pure BiVO4 compared to BiVO4/rGO composite were studied using X-ray diffraction (XRD), scanning electronmicroscopy (SEM), photoluminescence (PL) spectrophotoscopy, UV–vis spectrophotometer with an integrating sphere, and N2 adsorption-desorption isotherm based on BET theory. The photocatalytic activity of the prepared samples were evaluated by the degradation of MB dye in aqueous medium under visible light irradiation. The result showed that the BiVO4/rGO composite exhibited greater photocatalytic efficiency compared to pure BiVO4 with the photocatalytic degradation efficiency remains stable up to fifth cycle. The improved activity of the BiVO4/rGO composite might be attributed to the high surface area available to adsorb more MB molecules, and efficient charge separation of BiVO4 through π electron on the rGO structure. According to experimental results, the possible photocatalytic mechanism of the BiVO4/rGO composite were determined and the active species hydroxyl radical were reported. Based on photocatalytic activity inhibition in the presence of both h+ (VB) and O2 •− (CB) scavengers over the BiVO4 photocatalyst, it can be proposed that the hydroxyl radical generated during the photocatalytic degradation mechanism is mainly responsible by the main active species of h+ and O2 •− at VB and CB positions, respectively. © 2019, The Author(s).
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Office of the Higher Education Commission; Chiang Mai University; Thailand Research Fund
License
CC BY
Rights
Author
Publication Source
Scopus