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Preparation, characterization of Mo, Ag-loaded BiVO$_{4}$ and comparison of their degradation of methylene blue

Content Provider	Springer Nature Link
Author	Liu, KunJie Chang, ZhiDong Li, WenJun Che, Ping Zhou, HuaLei
Copyright Year	2012
Abstract	Two types of metal-loaded visible-light-driven photocatalysts, Mo-BiVO$_{4}$ and Ag-BiVO$_{4}$, were synthesized by wet impregnation method. Material poperties were characterized by UV-vis diffuse reflectance spectroscopy, X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy and low temperature nitrogen adsorption-desorption. Photocatalytic activity of the obtained materials was investigated through degrading methylene blue (MB) solution under visible-light irradiation. The results reveal that both metal loaded-BiVO$_{4}$ catalysts have monoclinic scheelite structure. Mo and Ag exist as oxides on the surface of the particles. The changes of absorption in visible-light region, band gap (E $_{g}$) and specific surface area (A $_{BET}$) caused by loading Ag are more obvious than those caused by loading Mo. But the isoelectric point of Ag-BiVO$_{4}$ decreases less than that of Mo-BiVO$_{4}$ does. Both catalysts show higher photocatalytic activity than pure BiVO$_{4}$, resulting in the significantly improved efficiency of degradation of MB. And the degradation efficiency of these two metal-loaded BiVO$_{4}$ photocatalysts is similar to each other. However, mechanisms of such enhancement are different. The decrease of isoelectric point helps Mo-BiVO$_{4}$ improve the degradation efficiency. As for Ag-BiVO$_{4}$, the augmentation of absorption in visible-light region as well as the abatement of E $_{g}$ plays more important roles.
Starting Page	1770
Ending Page	1775
Page Count	6
File Format	PDF
ISSN	16747291
Journal	Science in China Series B: Chemistry
Volume Number	55
Issue Number	9
e-ISSN	18691870
Language	English
Publisher	SP Science China Press
Publisher Date	2012-03-12
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mo-BiVO$_{4}$ Ag-BiVO4 visible light photocatalyst isoelectric point Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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