文献类型：期刊文献

英文题名：Interfacial Growth of TiO2-rGO Composite by Pickering Emulsion for Photocatalytic Degradation

作者：Zhang, Shenping[1];Xu, Jian[3];Hu, Jun[1];Cui, Changzheng[2];Liu, Honglai[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Environm Protect Key Lab Environm Risk Assessment, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Shanghai Inst Measurement & Testing Technol, 1500 Zhang Heng Rd, Shanghai 201203, Peoples R China

年份：2017

卷号：33

期号：20

起止页码：5015

外文期刊名：LANGMUIR

收录：;EI(收录号：20172203705848);WOS:【SCI-EXPANDED(收录号:WOS:000402497900016)】；

基金：This work is supported by the National Key Technology Support Program of China (2015BAC04B01) and the Natural Science Foundation of China (Nos. 91334203, 21376074, 21676080). Shanghai Municipal Bureau of Quality and Technical Supervision Foundation of China (No. 2015-03), and the project of FP7-PEOPLE-2013-IRSES (PIRSES-GA-2013-612230).

语种：英文

外文关键词：Electric lamps - Photocatalysts - Rate constants - Aromatic compounds - Efficiency - Emulsification - Nanoparticles - Light absorption - Light - Organic pollutants

摘要：A 2D sandwich-like TiO2-rGO composite was fabricated by the Pickering emulsion approach to improve the photocatalytic efficiency. Through an in situ growth of antase-TiO2 nanoparticles on the interface of O/W type GO Pickering emulsion, TiO2 nanoparticles were closely and densely packed on the surface of well-exfoliated rGO sheets; meanwhile, many mesoporous voids acting as the adsorption chamber and microreactor were produced. Evaluated by methylene blue (MB) degradation, its photocatalytic activity was prominent compared with the common TiO2-based photocatalyst, with the rate constants 5 and 3.1 times higher under visible light and xenon lamp, respectively. When we applied it in the photocatalytic degradation of tetracycline hydrochloride (TCH, such as 10 ppm) under the visible light without adding any oxidants; the total removal efficiency was as high as 94% after 40 min. The mechanism of this good photocatalytic efficiency was illustrated by the scavenger trapping tests, which showed that this unique structure of TiO2-rGO composite induced by the Pickering emulsion can significantly enhance the light absorption ability, accelerate the separation rate of electron hole pairs, increase the adsorption capacity of organic pollutants, and hence improve the photocatalytic efficiency.