镧和氧化石墨烯掺杂对TiO_(2)光催化性能的影响  

Effect of lanthanum and graphene oxide doping on the photocatalytic performance of titanium dioxide

作　　者：李佳 张学文 谭智勇 魏小清 周歆 Li Jia;Zhang Xuewen;Tan Zhiyong;Wei Xiaoqing;Zhou Xin(School of Civil Engineering,Hunan University of Technology,Zhuzhou 412007;School of Civil Engineering,Changsha University,Changsha 410022;School of Economics and Management,Tongren University,Tongren 554300;China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha 410000)

机构地区：[1]湖南工业大学土木工程学院,株洲412007 [2]长沙学院土木工程学院,长沙410022 [3]铜仁学院经济管理学院,铜仁554300 [4]中国建筑第五工程局有限公司,长沙410000

出　　处：《化工新型材料》2023年第2期159-163,168,共6页New Chemical Materials

基　　金：湖南省自然科学基金青年基金(2020JJ5133);贵州省教育厅青年科技人才成长项目(黔教KY字[2019]175);湖南省教育厅科研项目(20C0608)。

摘　　要：采用一步溶胶-凝胶法将镧、氧化石墨烯(GO)和TiO_(2)三种物质复合,制备出一种高效的具有可见光响应的光催化材料。借助X射线衍射仪、X射线光电子能谱分析仪、扫描电镜等手段对该催化剂的晶体结构和形貌进行了表征,并以酸性红B作为目标污染物,研究了该复合材料在模拟日光辐照下的光降解性能。实验结果表明,镧和GO的掺杂显著提高了TiO_(2)的光催化活性,当镧掺杂量为0.5%(wt,质量分数,下同),GO掺杂量为0.2%时,对酸性红B的光降解率为95.6%。A sol-gel method was used to compound lanthanum, graphene oxide(GO) and TiO_(2)to prepare an efficient photocatalytic material with visible light response.The crystal structure and morphology of the catalyst were characterized by means of X-ray diffractometer, Fourier infrared, scanning electron microscopy.Acid red B was used as the target pollutant to study the photodegradability of the composite material under simulated sunlight irradiation.The experimental results showed that the doping of lanthanum and GO significantly improved the photocatalytic activity of TiO_(2).When the doping amount of lanthanum was 0.5%(mass ratio) and the doping amount of GO was 0.2%(mass ratio),the photodegradation rate of acid red B was 95.6%.

关 键 词：溶胶-凝胶法 氧化石墨烯 二氧化钛 酸性红B 光催化 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]