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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 4    April 2017

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Preparation and characterization of highly photocatalytic active hierarchical BiOX (X=Cl, Br, I) microflowers for rhodamine B degradation with kinetic modelling studies
GU Ying-ying(古映莹), ZHAO Li(赵莉), YANG Ming-yang(杨明阳), XIONG Yi-qiu(熊意求), WU Zhe(吴喆), ZHOU Min-jia(周敏嘉), YAN Jun(颜军)

School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Abstract: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 N2 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 m2/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.

 

Key words: microstructure; semiconductors; photocatalysis; BiOX

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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