g-C3N4/Ag/TiO2复合材料的构筑及其光催化性能（英文）  

Constructing and Photocatalytic Performance of g-C3N4/Ag/TiO2 Composites

作　　者：李平 张孝贤 斯颖 梁婷婷 刘欢 邱灵芳 段舒祺 多树旺 陈忠 LI Ping;ZHANGA Xiao-Xian;SI Ying;LIANG Ting-Ting;LIU Huan;QIU Ling-Fang;DUAN Shu-Qi;DUO Shu-Wang;CHEN Zhong(Jiangxi Key Laboratory of Material Surface Engineering,School of Materials and Mechanical and Electrical Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China)

机构地区：[1]江西科技师范大学材料与机电学院江西省材料表面工程重点实验室

出　　处：《无机化学学报》2020年第3期566-574,共9页Chinese Journal of Inorganic Chemistry

基　　金：supported by the National Natural Science Foundation of China (Grant No. 41760300);Natural Science Foundation of Jiangxi Province (Grant No.20171BAB206008, 20181BAB206011);Scientific Research Fund of Jiangxi Provincial Education Department (Grant No.GJJ180635, GJJ180596, GJJ180603, GJJ170665);the Doctoral Research Foundation of Jiangxi Science and Technology Normal University (Grant No.2017BSQD008)~~

摘　　要：以合成的g-C3N4纳米片和Ag/TiO2空心微球为原料,采用机械搅拌的方法构筑了g-C3N4/Ag/TiO2三元复合光催化剂。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、X射线光电子能谱(XPS)、紫外-可见光漫反射(UV-Vis DRS)和光致发光光谱(PL)对g-C3N4/Ag/TiO2进行了表征。研究表明,g-C3N4/Ag/TiO2是由Ag/TiO2微球和g-C3N4纳米片复合而成的。与TiO2相比,其可见光响应范围延长,光生载流子的分离速率加快。在室温下,用降解罗丹明B的反应考察了g-C3N4/Ag/TiO2的可见光催化活性。研究表明,光照180 min时,g-C3N4(0.5%)/Ag/TiO2显示了最高的光催化活性(91.9%),分别是TiO2和Ag/TiO2的7.5和1.8倍。光催化活性的提高与合理的异质结构建和Ag的导电性能有关。g-C3N4/Ag/TiO2 ternary photocatalysts were successfully constructed by a mechanical agitation method with as-synthesized Ag/TiO2 hollow microspheres and g-C3N4 nanosheets as the raw materials.The photocatalysts were systematically characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS),and photoluminescence spectra(PL).The results showed that g-C3N4/Ag/TiO2 was assembled by Ag/TiO2 microspheres and g-C3N4 nanosheets.Compared with TiO2,the resultant g-C3N4/Ag/TiO2 heterojunctions possessed longer visible-light response range and faster photo-induced carrier separation rate.At room temperature,the visible-light photocatalytic activity of g-C3N4/Ag/TiO2 was investigated by photodegradation of rhodamine B(RhB).The results showed that the highest visible-light-driven photocatalytic efficiency of g-C3N4(0.5%)/Ag/TiO2 with 180 min of light irradiation was 91.9%,which was nearly 7.5 and 1.8 times higher than pure TiO2 and two-component Ag/TiO2,respectively.The enhanced photocatalytic activity could be mainly attributed to the reasonably designed heterojunctions and the electrical conductivity of Ag.

关 键 词：光催化 二氧化钛 模板法 石墨相氮化碳 罗丹明B 光降解 

分 类 号：O614.411[理学—无机化学]