DOI码：10.1016/j.seppur.2018.03.010

所属单位：扬州大学

发表刊物：Separation and Purification Technology

关键字：Tin dioxide；Polyaniline；Nanocomposites；Visible light；Photocatalysis；Hexavalent chromium reduction

摘要：Polyaniline (PANI) was adopted to modify SnO2 nanoparticles for developing a promising high efficiency visible light-driven photocatalyst for the treatment of Cr(VI)-polluted wastewaters. PANI modified SnO2 nanoparticles (SnO2/PANI nanocomposites) were synthesized via the following procedures: (i) SnO2 nanoparticles were synthesized by hydrothermal treatment of SnCl4·5H2O in deionized water at 200 °C for 15 h; and (ii) adsorption of PANI in N,N-Dimethylformamide solution by SnO2 nanoparticles, then evaporation of N,N-Dimethylformamide. The compositions, structures, optical and photoelectrochemical properties of SnO2/PANI nanocomposites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, high resolution transmission electron microscopy, UV–vis diffuse reflectance spectra, photocurrents measurements and electrochemical impedance spectra. The photocatalytic tests showed that SnO2/PANI nanocomposites had far higher photocatalytic activity than SnO2 nanoparticles in the reduction of aqueous Cr(VI) under visible light (λ > 420 nm) irradiation (for example, the reaction rate constant for photocatalytic reduction of Cr(VI) by the most efficient SnO2/PANI-3% was about 23 times that by SnO2). Besides, the effects of photocatalytic experiment parameters (including dosage of photocatalyst, initial concentration and pH of Cr(VI) aqueous solution, and coexistent anions and cations) on the Cr(VI) removal rate by SnO2/PANI-3% were also investigated.

论文类型：Research Atricle

论文编号：https://doi.org/10.1016/j.seppur.2018.03.010

学科门类：理学

一级学科：化学

文献类型：journal Article

卷号：201

页面范围：120-129

是否译文：否

发表时间：2018-08-07

收录刊物：SCI

发布期刊链接：https://doi.org/10.1016/j.seppur.2018.03.010