TiO2/g-C3N4光催化材料的制备及其可见光降解性能研究  

Preparation and photocatalytic degradation property of TiO/g-CN material

作　　者：冯胜雷 刘方华[1] 付翔[1] 郭慧 彭小英 宋军伟[1,2] Feng Shenglei;Liu Fanghua;Fu Xiang;Guo Hui;Peng Xiaoying;Song Junwei(School of Civil Engineering,Jiangxi University of Technology,Nanchang 330098;Institute of Green Architecture,Jiangxi University of Technology,Nanchang 330098)

机构地区：[1]江西科技学院土木工程学院,南昌330098 [2]江西科技学院绿色建筑研究所,南昌330098

出　　处：《化工新型材料》2020年第11期99-102,107,共5页New Chemical Materials

基　　金：国家自然科学基金(51668021);江西省教育厅科技项目基金(GJJ180968,GJJ180969);江西科技学院自然科学项目基金(ZR1803,ZR1812);江西科技学院汽车服务工程及产业升级协同创新中心开放课题(19XTKFYB04);江西省自然科学基金(20192BAB206041)。

摘　　要：将纳米TiO2与尿素均匀混合,以密封热解的方法制备了二氧化钛/石墨相氮化碳(TiO2/g-C3N4)复合光催化剂。利用X射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜对复合光催化剂进行了表征,研究了TiO2/g-C3N4复合光催化剂的可见光降解性能、对染料的降解选择性和循环降解寿命。结果表明,TiO2与g-C3N4成功地结合在一起,制备的TiO2/g-C3N4复合光催化剂降解性能优于纯g-C3N4,降解过程中TiO2/g-C3N4反应速率常数是纯g-C3N4的2.22倍,对罗丹明B(RhB)的降解效果最好,循环5次后RhB降解率降低了14.3%。TiO2/g-C3N4composite photocatalytic material was prepared by uniformly mixing nano TiO2 with urea and then sealed pyrolysis.The material was characterized by X-ray diffractometry,fourier transform infrared spectroscopy and scanning electron microscope.The visible light degradation property of TiO2/g-C3N4,degradation selectivity and cycle degradation life were investigated.The results shown that the composite material was succeeded to couple TiO2and g-C3N4.The fabricated TiO2/g-C3N4had better degradation property than pure g-C3N4,with the 2.22times reaction rate constant than pure g-C3N4.Rhodamine(RhB)was degraded best by TiO2/g-C3N4.After 5cycles,the degradation efficiency reduced by 14.3%.The prepared TiO2/g-C3N4composite photocatalytic material had a broad application prospect in industrial wastewater treatment.

关 键 词：废水处理 光催化剂 可见光 石墨相氮化碳 二氧化钛 

分 类 号：O643.36[理学—物理化学]