Journal
APPLIED SCIENCES-BASEL
Volume 8, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/app8020216
Keywords
bismuth vanadate; low-cost method; methylene blue dye; microspheres; photocatalyst; visible light
Categories
Funding
- National Institute of Material Science
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A flower-like BiVO4 microsphere photocatalyst was synthesized with a simple template-free homogeneous precipitation method at 60 degrees C for 24 h. The purpose of this study is to explore a low-cost, simple method of synthesizing the self-assembled 3D structure in order to enhance photocatalytic performance under visible light irradiation (lambda > 420 nm). In this study, the morphology, structure, and photo-absorption of flower-like BiVO4 microspheres were characterized, and the effects of photocatalysis were analyzed. The results indicate that the size of the flower-like microspheres was about 2 m to 4 m and they were composed of several nanosheets. The mechanism of hierarchical microsphere formation has been proposed as the Ostwald ripening process and the self-assembled process. The obtained samples were calcined under different temperatures (300 degrees C, 400 degrees C, 500 degrees C and 600 degrees C) to study the effects of calcination on the structure and on photocatalysis. The photocatalytic process was then evaluated by decolorization of methylene blue dye under visible-light irradiation.
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