Preparation and characterization of highly photocatalytic active hierarchical BiOX (X=Cl, Br, I) microflowers for rhodamine B degradation with kinetic modelling studies

The hierarchical BiOX (X=Cl, Br, I) microflowers were successfully synthesized via simple precipitation method at 160 °C for 24 h and characterized by XRD, SEM, TEM, UV-vis DRS and N 2 adsorption-desorption techniques. The as-prepared samples were pure phases and of microflowers composed of nanoshee...

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Published inJournal of Central South University Vol. 24; no. 4; pp. 754 - 765
Main Authors Gu, Ying-ying, Zhao, Li, Yang, Ming-yang, Xiong, Yi-qiu, Wu, Zhe, Zhou, Min-jia, Yan, Jun
Format Journal Article
LanguageEnglish
Published Changsha Central South University 01.04.2017
Springer Nature B.V
Subjects
Engineering
Kinetics
Light irradiation
Metallic Materials
Photodegradation
Rhodamine
microstructure
photocatalysis
semiconductors
BiOX
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ISSN2095-2899
2227-5223
DOI10.1007/s11771-017-3477-x

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Summary:The hierarchical BiOX (X=Cl, Br, I) microflowers were successfully synthesized via simple precipitation method at 160 °C for 24 h and characterized by XRD, SEM, TEM, UV-vis DRS and N 2 adsorption-desorption techniques. The as-prepared samples were pure phases and of microflowers composed of nanosheets which intercrossed with each other. The specific surface areas were about 22.9, 17.3 and 16.2 m 2 /g for BiOCl, BiOBr and BiOI, respectively. The photocatalytic activities of BiOX powers were evaluated by RhB degradation under UV-vis light irradiation in the order of BiOCl > BiOBr > BiOI. Also, the kinetics of RhB degradation over BiOI was selectively investigated, demonstrating that the kinetics of RhB degradation follows apparent first-order kinetics and fits the Langmuir-Hinshelwood model.
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ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-017-3477-x