文献类型：期刊文献

英文题名：Reduced Graphene Oxide-Titanium Dioxide Nanocomposites: Structural Characterization and Photocatalytic Degradation of Gaseous Formaldehyde

作者：Zhang, Jie[1];Yang, Huan[1];Xu, Xiao[1];Liu, Yujiao[1];Ren, Haojun[1];Chen, Pingping[1];Yang, Kang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：217

期号：19

外文期刊名：PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

收录：;EI(收录号：20203209018041);WOS:【SCI-EXPANDED(收录号:WOS:000555840000001)】；

基金：This study was supported by the Shanghai Key Laboratory Project (08DZ2230500) and Guangdong Tailai Coatings Co., Ltd., China.

语种：英文

外文关键词：gaseous formaldehyde; photocatalysis; reduced graphene oxide; titanium dioxide

摘要：TiO2/rGO nanocomposites are prepared by the solvothermal process using titanium sulfate and graphene oxide (GO) as raw materials utilized for the photodegradation of gaseous formaldehyde. Characterization by Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) reveal that GO is partially reduced to reduced GO (rGO) and Ti-O-C bond is formed between TiO(2)and rGO. X-ray diffraction (XRD) confirms that the presence of anatase TiO2. High-resolution transmission electron microscopy (HRTEM) exhibits that TiO(2)nanoparticles with a diameter of approximate to 20 nm are uniformly loaded on the wrinkled rGO sheets. UV-vis spectroscopy reveals that the absorption intensity of TiO2/rGO increases with increasing GO content. Photoluminescence (PL) spectroscopy indicates that the ability of restraining electron-hole recombination initially increases with increasing GO content, followed by a gradual decrease. The TiO2/rGO nanocomposite (m(TiO2):m(GO) = 40:1) demonstrates optimal photocatalytic performance with formaldehyde degradation rate of 96% in 2 h and stable activity, which can be ascribed to the larger reduction of GO (76.19%), higher Ti-O-C bonds (17%), unfolded rGO sheets, and lower electron-hole recombination rate.