文献类型：期刊文献

英文题名：Fabrication of PET/BiOI/SnO2 heterostructure nanocomposites for enhanced visible-light photocatalytic activity

作者：Wang, Kai[1];Zhang, Weizhou[1];Guan, Xinyuan[2];Liu, Yaxin[2];Wei, Ting[1];Guo, Weihong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Polymer Proc Lab,Key Lab Preparat & Applicat Ultr, Shanghai 200237, Peoples R China;[2]Jiangsu Hengtong Power Cable Co Ltd, Suzhou 215200, Jiangsu, Peoples R China

年份：2018

卷号：82

起止页码：34

外文期刊名：SOLID STATE SCIENCES

收录：;EI(收录号：20182705406666);WOS:【SCI-EXPANDED(收录号:WOS:000438684700007)】；

基金：The authors sincerely acknowledge 'Scientific and Technological Achievements Transformation Program of Jiangsu Province (SBA2014010034)' and 'Ningbo Industrial Major Projects (201601ZD-A01026)'.

语种：英文

外文关键词：BiOI; SnO2; Heterostructure; Nanofibers; Photocatalysis

摘要：Heterojunction BiOI/SnO2 nanocomposites have been facilely synthesized by using successive ionic layer adsorption and reaction (SILAR) and a hydrothermal method, and polyethylene terephthalate (PET) nanofibers (NFs) were utilized as a photocatalyst carrier to support the BiOI/SnO2 nanocomposites. PET/BiOI/SnO2 NFs displayed excellent photocatalytic ability towards methyl orange (MO) and tetracycline (TC) under visible light irradiation. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were employed to investigate the morphology, crystal structure and chemical state of the PET/BiOI/SnO2 nanofibers. Photoluminescence (PL) and active species trapping experiments indicated that photoinduced charge separation promoted the formation of holes (h(+)) and superoxide radicals (center dot O--(2)). Moreover, a photodegradation mechanism was proposed to illustrate that the formation of a Fermi level equilibrium state between semiconductors accelerated charge separation in the semiconductor. This study is meaningful for providing new inspiration to design and fabricate novel heterostructure photocatalysts with enhanced photocatalytic activity.