g-C_3N_4/CuPc复合材料的制备及其光催化性能研究  

Study on preparation and photocatalytic performance of g-C_3N_4/CuPc composite materials

作　　者：梅洁 崔世海[2] 张大鹏 MEI Jie;CUI Shihai;ZHANG Dapeng(,School of Chemistry and Biological Engineering,Nanjing Normal University Taizhou College,Taizhou 225300,China;School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学泰州学院化学与生物工程学院,江苏泰州225300 [2]南京师范大学化学与材料科学学院,南京210023

出　　处：《功能材料》2018年第8期8021-8025,8030,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21177061);江苏省自然科学基金资助项目(BK20150968)

摘　　要：以三聚氰胺为前驱体,先通过煅烧法制备石墨相氮化碳(g-C_3N_4),再利用超声法引入铜酞菁(CuPc)制备出石墨相氮化碳/铜酞菁(g-C_3N_4/CuPc或CN@CuPc)光催化复合材料。通过场发射扫描电子显微镜(FESEM)、X射线衍射谱(XRD)及紫外-可见吸收光谱(DRS)等分析手段对所制备材料进行表征。以2,3-二氯苯酚为目标污染物,在500 W氙灯的照射下,考察了复合材料的含量、复合材料的投加量及污染物初始浓度等条件对光催化效果的影响。实验结果表明,在最佳的实验条件下,2,3-二氯苯酚经照射240 min后,降解率可达92%左右。该光催化反应符合拟一级反应动力学模型;在此反应过程中,起关键作用的活性物种为羟基自由基(·OH)。In this paper,melamine was selected as the precursor to prepare g-C3N4 through calcination method.The g-C3N4/CuPc composites were synthesized by ultrasonic method,then the prepared materials were characterized by field emission scanning electron microscopy（FESEM）,X-ray diffraction spectra（XRD）and UV-Visible absorption spectrum analysis（DRS）.In the photocatalytic degradation experiments,2,3-dichlorophenol was chosen as the target contaminant to investigate the photocatalytic activity of the prepared materials under the500 W xenon lamp irradiation.Various experimental parameters including the mass ratio of CuPc and g-C3N4 in g-C3N4/CuPc composites,the dosage,and the initial concentration of 2,3-dichlorophenol were optimized.In addition,the kinetics of the photocatalytic reaction was also discussed.The experimental results show that the degradation efficiency of 2,3-dichlorophenol can reach 92% after 240 min of irradiation.The reaction was conformed to follow the first-order reaction kinetics model.·OH plays the main role in the photocatalytic process of 2,3-dichlorophenol.

关 键 词：石墨相氮化碳/铜酞菁 光催化 2 3-二氯苯酚 

分 类 号：TB333[一般工业技术—材料科学与工程]