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Research Paper

Enhanced visible light photocatalytic activity of nano-BiOCl/BiVO4/Zeolite p-n heterojunction and Ag/BiOCl/BiVO4 hybrid

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Pages 137-143 | Received 16 Sep 2016, Accepted 14 Nov 2016, Published online: 14 Dec 2016
 

Abstract

Visible light-active BiOCl/BiVO4/mordenite and Ag/BiOCl/BiVO4 nanocomposite with a p–n heterojunction structure were prepared. Mordenite nanocrystals were synthesised using the hydrothermal method. Deposition and reduction methods were utilised to modify the Zeolite surface. The photocatalytic activities of the heterojunctions were investigated by scanning the change of Acid blue 92 (AB92) concentration under visible irradiation. The nanocomposites demonstrated improved efficiency for dye photodegradation. The activities are due to strong oxidative ability and efficient charge separation and transfer through the BiOCl/BiVO4 p–n junction. The photogenerated electron-holes react with species in medium and produce reactive radicals attack to organic pollutant. The photoreaction kinetics and mechanism with these nanostructures were investigated. Pseudo-first-order reaction was observed for dye degradation kinetics.

Funding

This work was supported by the Iran National Science Foundation [grant number 92021283].

Disclosure statement

No potential conflict of interest was reported by the authors.

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