C_3N_4-TiO_2复合光催化剂的制备及其太阳光催化性能  

Preparation and the sunlight photocatalytic properties of C_3N_4-TiO_2 composite

作　　者：高志慧[1] 张秀芳[1] 马春[1] GAO Zhihui ZHANG Xiufang MA Chun(School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2016年第6期441-444,共4页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金资助项目(21577008)

摘　　要：以TiO_2和三聚氰胺为原料,在超声搅拌作用下于水相中将两种物质进行混合,而后烘干并采用一步固相法将不同质量比的TiO_2和三聚氰胺混合物置于马弗炉中进行高温煅烧,制得C_3N_4-TiO_2复合光催化剂;对制备的复合物进行X射线衍射、荧光光致发光光谱、扫描电子显微镜、紫外-可见吸收光谱对其理化性能进行表征;以罗丹明B为目标污染物,使用氙灯模拟太阳光光源,对复合物的光催化性能进行评价。结果表明,C_3N_4的引入增强了复合光催化剂的吸附能力;TiO_2与类石墨型C_3N_4的复合,增强了光催化剂对光的吸收能力,C_3N_4-TiO_2复合光催化剂的光催化性能较纯TiO_2有明显提高,TiO_2对污染物罗丹明B的降解效率可达21%,C_3N_4-TiO_2复合光催化剂的降解效率可达99%。C3N4-TiO2 composite photocatalyst was prepared using different mass ratio of TiO2 and melamine mixed under ultrasonic agitation in water and calcinated in muffle furnace by one-step solid phase method.C3N4-TiO2 was characterized by X ray diffraction,fluorescence spectrometry,optical diffuse-reflection spectra,scanning electron microscope and UV-vis spectrophotometer.The catalytic properties of the composite were determined using Rhodamine B（RhB）as target pollutant and the light of xenon lamp simulated sunlight source.The adsorption capacity of the composite photocatalyst was improved compared with the pure TiO2,and its degradation efficiency increased from 21%to 99%.

关 键 词：光催化剂 氮化碳 二氧化钛 罗丹明B 太阳光 

分 类 号：X703[环境科学与工程—环境工程]