g-C_3N_4/TiO_2复合纳米材料的制备及其光催化性能分析  

Preparation and photocatalytic property of graphitic carbon nitride (g-C_3N_4) hybridized TiO_2 nanometer materials

作　　者：傅遍红[1] 郭淑慧[1] 傅敏[2] 李增霞[1] 

机构地区：[1]重庆大学资源及环境科学学院,重庆400044 [2]重庆工商大学环境与生物工程学院,重庆400067

出　　处：《功能材料》2014年第12期12138-12144,共7页Journal of Functional Materials

基　　金：重庆市应用开发计划重点资助项目(stc2013yykfB50008);重庆市教委科技资助项目(KJ120713)

摘　　要：以工业偏钛酸为钛前驱体,三聚氰胺为氮源,制备了g-C3N4/TiO2复合光催化剂;用X射线衍射(XRD)能谱、X射线光电子(XPS)能谱、傅里叶红外变换光谱(FT-IR)及热重和差示扫描量热分析(TGDSC)、透射电子显微镜(TEM)、紫外-可见吸收(UVVis)光谱、三维荧光(FS)光谱、物理吸附仪(BET)等对催化剂进行了表征。可见光催化实验表明,三聚氰胺与工业偏钛酸质量比为1,500℃煅烧制得的g-C3N4/TiO2复合催化剂对亚甲基蓝表现出最佳的光催化活性,300min内对10mg/L亚甲基蓝溶液的降解率达到83%。Graphitic carbon nitride（g-C3N4）hybridized TiO2 nanometer materials was prepared by annealing metatitanic acid and melamine.The prepared composites were characterized by X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,Fouriertransform infrared spectroscopy（FT-IR）and thermogravimetric-differential scanning calorimetry analysis（TG-DSC）,transmission electron microscopy（TEM）,ultraviolet-visible diffuse reflection spectroscopy（UV-Vis）,three-dimensional fluorescence spectroscopy（FS）,and the N2 gas adsorption brunauer-emmett-teller method（N2-BET）.The catalysis experiment show that the g-C3N4 hybridized TiO2 composites,which the proportion of melamine and metatitanic acid was 1 and calcined at 500℃,exhibited higher activity under visible light irradiation,while the photodegradation rate of 10mg/L methylene blue reached to 83%.

关 键 词：偏钛酸 三聚氰胺 TIO2 光催化 

分 类 号：O643.361[理学—物理化学] O69[理学—化学]