Ag/碳纳米管-TiO2光催化剂的制备及光催化性能研究  

Preparation and performance of Ag/CNT-TiO2 photocatalyst

作　　者：梁红莲[1] 任萍[1] 徐慧娟[1] 李桂花[1] 王春平 毕广萍 Liang Honglian;Ren Ping;Xu Huijuan;Li Guihua;Wang Chunping;Bi Guangping(Faculty of Chemistry and Material Science,Langfang Teachers University,Langfang 065000;Hebei Zaoqiang Senior Middle School,Hengshui 053000;Langfang City Product Quality Supervision and Inspection Institute,Langfang 065000)

机构地区：[1]廊坊师范学院化学与材料科学学院,廊坊065000 [2]河北枣强中学,衡水053000 [3]廊坊市产品质量监督检验所,廊坊065000

出　　处：《化工新型材料》2020年第5期281-285,共5页New Chemical Materials

基　　金：廊坊市科技局自筹经费项目(2016011042);河北省高等学校科学技术研究项目(z2018007)。

摘　　要：通过溶胶-凝胶法制备了Ag/碳纳米管-TiO2复合光催化剂,利用X射线衍射、扫描电镜、紫外-可见漫反射和X射线光电子能谱对复合光催化剂进行了表征,并考察了复合材料对亚甲基蓝溶液、亚甲基绿溶液、1,9-二甲基亚甲基蓝的光催化降解性能。结果表明:煅烧温度为400℃,Ag含量为0.8%,碳纳米管含量为10%的复合光催化剂在普通节能日光灯照射下对初始浓度为20mg/L的3种染料分子溶液的降解效果最好,分别达到为90.35%、80.16%和96.85%,其降解率接近氙灯下的降解率。光催化机理研究得出空穴(h^+)是光催化降解3种染料分子的主要活性物种。Ag/carbonnanotube(CNT)-TiO2 photocatalysts were prepared by using sol-gel method.X-ray diffraction(XRD),scanning electron microscope(SEM),UV-visible diffuse-reflectance spectrum(UV-Vis DRS)and Xray photoelectron spectroscope(XPS)were used to characterize the photocatalysts.The photocatalysis tests of Ag/CNT-TiO2 for methylene blue solution,methylene green solution and 1,9-dimethyl methylene blue solution were investigated.The results shown that Ag/CNT-TiO2 with 0.8% Ag,10% CNT and calcination temperature 400℃ had a very high photocatalytic activity for three solution under fluorescent lamp.The photocatalysis degradation rates were90.35%,80.16% and 96.85%,respeactively,which approached the degradation rates under xeon lamp.The results of the experiments indicated that the main active substance in the reaction of three dye molecules was hole(h^+).

关 键 词：AG 碳纳米管 TIO2 溶胶-凝胶法 光催化性能 

分 类 号：O644.1[理学—物理化学] X703[理学—化学] O643.36[环境科学与工程—环境工程]