Enhanced Photocatalytic Activity by Silver-Modified Bismuth Vanadate

Cheewita Suwanchawalit; Kamonchanok Roongraung; Supat Buddee; Sumpun Wongnawa; Avinash Patil

doi:10.4028/www.scientific.net/KEM.757.88

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 757Enhanced Photocatalytic Activity by...

Enhanced Photocatalytic Activity by Silver-Modified Bismuth Vanadate

Abstract:

Silver-modified bismuth vanadate (Ag-BiVO₄) photocatalysts were easily prepared via the co-precipitation method. The effects of silver contents on the chemical properties of BiVO₄ were evaluated. The prepared Ag-BiVO₄ samples were characterized by several techniques such as X-ray diffractometry (XRD), scanning electron microscopy (SEM), and diffused reflectance UV-Vis spectroscopy (DRS). The mixed phase of monoclinic scheetlite structure and characteristic peaks of silver particles were found. Silver contents strongly affect the morphology of the prepared Ag-BiVO₄ samples. DRS spectra revealed that the synthesized Ag-BiVO₄ samples exhibited strong absorption in the visible region. The absorption in the visible zone is responsible for the high photocatalytic activity of Ag-BiVO₄ under visible light irradiation. The photocatalytic degradation of methylene blue under visible light irradiation was studied using the BiVO₄ as photocatalysts. The photocatalytic results reveal that the prepared Ag-BiVO₄ samples could degrade the methylene blue dye.

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Key Engineering Materials (Volume 757)

Pages:

88-92

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.757.88

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Online since:

October 2017

Authors:

Cheewita Suwanchawalit*, Kamonchanok Roongraung, Supat Buddee, Sumpun Wongnawa, Avinash Patil

Keywords:

Degradation of Methylene Blue, Silver-Modified Bismuth Vanadate

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