Synthesis and characterization of Ag3PO4 immobilized in bentonite for the sunlight-driven degradation of Orange II

Authors: Jianfeng Ma, Jing Zou, Liangyin Li, Chao Yao, Tianli Zhang, Dinglong Li

Abstract:
A novel method for intercalating silver salt into bentonite interlayers is described. The very fine Ag₃PO₄ crystalline grains (less than 0.45 nm) were obtained in the interlayers of bentonite (Ag₃PO₄-Ben). Ag₃PO₄- Ben was characterized by XRD, FTIR, XRF, XPS and UV–vis diffuse reflectance spectroscopy. Ag₃PO₄-Ben particles exhibited high catalytic efficiency for Orange II degradation under visible light irradiation. The photocatalytic activity is attributed to the small-sized Ag₃PO₄ crystal immobilized in bentonite and the strong adsorption of dye on bentonite. The special structure of bentonite and the microenvironment around the catalysis enhanced the stability.

Keywords:
Photocatalysis
Visible light
Silver phosphate
Wastewater treatment

Published in: Applied Catalysis B: Environmental (Volumes 134–135, Pages 1-388, 2 May 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

Synthesis and characterization of Ag3PO4 immobilized in bentonite for the sunlight-driven degradation of Orange II

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