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Surface acid etching of (BiO)2CO3 to construct (BiO)2CO3/BiOX (X = Cl, Br, I) heterostructure for methyl orange removal under visible light

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Authors
Cao, J.
Li, Xin Yong
Lin, H.
Xu, B.
Chen, S.
Guan, Q.
Date
2013
Type
Journal Article

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Cao, J. and Li, X.Y. and Lin, H. and Xu, B. and Chen, S. and Guan, Q. 2013. Surface acid etching of (BiO)2CO3 to construct (BiO)2CO3/BiOX (X = Cl, Br, I) heterostructure for methyl orange removal under visible light. Applied Surface Science. 266: pp. 294-299.
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Applied Surface Science
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Department of Chemical Engineering
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Abstract

A series of (BiO)2CO3/BiOX (X = Cl, Br, I) heterostructured photocatalysts were synthesized through acid etching method and characterized by XRD, DRS, SEM and HRTEM, respectively. Under visible light (λ > 400 nm), (BiO)2CO3/BiOX displayed much higher photocatalytic activity than pure (BiO)2CO3 and corresponding BiOX for the degradation of methyl orange (MO). The photocatalytic activities of the as-prepared samples increased following this order: (BiO)2CO3/BiOCl < (BiO)2CO3/BiOBr < (BiO)2CO3/BiOI. The enhanced photocatalytic activities could be attributed to the function of heterojunction interface between (BiO)2CO3 and BiOX. Moreover, except for the role of heterostructure, the excellent photocatalytic performance of (BiO)2CO3/BiOI also originated from its good visible light absorption.