文献类型：期刊文献

英文题名：Dimensionality-dependent performance of nanostructured bismuth sulfide in photodegradation of organic dyes

作者：Huang, Jing[1];Zhang, Hua[1];Zhou, Xinggui[1];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Inst Appl Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：138

期号：2-3

起止页码：755

外文期刊名：MATERIALS CHEMISTRY AND PHYSICS

收录：;EI(收录号：20131016088860);WOS:【SCI-EXPANDED(收录号:WOS:000316580000049)】；

基金：We thank the National Natural Science Foundation of China (Nos. 20771037 and 20871047), the State Key Laboratory of Chemical Engineering (No. SKL-ChE-09C01), and the Science and Technology Commission of Shanghai Municipality (12ZR1407700) for financial support.

语种：英文

外文关键词：Adsorption; Nanostructures; Semiconductors; Oxidation

摘要：Nano-scaled semiconductors serving as photocatalysts in wastewater treatment are an important research area and the synergistic effect of adsorption and photocatalytic reaction should be considered in degradation. Bi2S3 nanostructures with different dimensionalities including dots, rods, and sheets have been synthesized for the study on their photocatalytic activities in degradation of organic dyes. X-ray diffraction and transmission electron microscopy results show that the orthorhombic structured samples have the dominant surface facets of (001), (010), and (100) for dots, rods, and sheets, respectively. The nanocrystals could selectively enhance the photodegradation of three typical dyes including rhodamine B, methylene blue, methyl orange, and the efficiencies are dependent on dimensionalities. Langmuir-Hinshelwood mode simulation studies reveal that the photodegradation satisfies the first-order dynamics for rods and sheets, while first-order exponential decay for dots. Investigations on the adsorption efficiency, visible-light irradiation, and activities on several cycles exhibit that the improvement in photodegradation efficiency of dots on rhodamine B is resulted from the synergistic effect of strong adsorption and photocatalytic reaction. (C) 2013 Elsevier B.V. All rights reserved.