Hydrothermal synthesis of meso/macroporous BiVO4 hierarchical particles and their photocatalytic degradation properties under visible light irradiation

Madhusudan, P. and Vijaya Kumar, M. and Ishigaki, T. and Toda, K. and Uematsu, K. and Sato, M. (2013) Hydrothermal synthesis of meso/macroporous BiVO4 hierarchical particles and their photocatalytic degradation properties under visible light irradiation. Environmental Science and Pollution Research, 20 (9). pp. 6638-6645. ISSN 1614-7499

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Abstract

An ordered hierarchical meso/macroporous monoclinic bismuth vanadate (BiVO4) particle was fabricated for the first time by a simple two-step melamine template hydrothermal method followed by calcination. The physiochemical parameters of as-prepared porous materials were characterized by means of X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, Raman, Barrett-Emmett-Teller, and UV-vis techniques. The nitrogen adsorption-desorption measurement and pore size distribution curve suggest that meso/macropores exist in these hierarchical microarchitectures. Further, it is found that melamine plays a significant role in the formation of porous BiVO4 particles, and when a known amount of melamine was added, the surface area and pore size of such porous BiVO4 particles were increased. The photocatalytic activities of the as-prepared hierarchical BiVO4 samples were measured for the photodegradation of Congo red aqueous dye solution under visible light irradiation. Surprisingly, the porous BiVO4 particles showed outstanding photocatalytic activities than polycrystalline BiVO4 sample. The possible enhancement of such catalytic performance has also been further discussed.

Item Type:	Article
Uncontrolled Keywords:	aqueous solution, article, bismuth, Bismuth, bismuth vanadium tetraoxide, dye, heat, hierarchical system, Hot Temperature, hydrothermal activity, irradiation, light, Light, Photochemical Processes, photochemistry, photodegradation, physicochemical property, synthesis, Vanadates, vanadic acid, visible spectrum
Subjects:	F Earth Science > Geology
Divisions:	Department of > Earth Science
Depositing User:	Arshiya Kousar Library Assistant
Date Deposited:	18 Oct 2019 09:17
Last Modified:	18 Oct 2019 09:17
URI:	http://eprints.uni-mysore.ac.in/id/eprint/9173

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