OMC/g-C_3N_4复合材料可见光催化2,4-氯酚的研究  

OMC/g-C_3N_4 Composites Visible-light Driven Photo-degradating Processing 2,4-Dichlorophenol

作　　者：董继锋[1] 陶红[1] 庞涛[1] 戴博琳 宋晓锋[1] 

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《广州化工》2015年第4期71-73,120,共4页GuangZhou Chemical Industry

基　　金：污染控制与资源化研究国家重点实验室开放课题(PCRRF12005)

摘　　要：将有序介孔碳材料(OMC)按照一定的质量比例(0.01、0.02、0.04、0.08)加入石墨型氮化碳材料(g-C3N4)再低温煅烧获得了介孔碳/石墨型氮化碳复合材料(OMC/g-C3N4)。可见光下光催化降解2,4-氯酚的实验结果表明,有序介孔碳材料提高了复合材料的吸附和光催化性能,去除吸附作用后,样品0.04-OMC/g-C3N4的光催化效率为纯氮化碳的3.68倍。降解产物的气相色谱-质谱分析结果表明2,4-氯酚的降解主要是被羟基自由基脱氯和甲基化成其他中间后再被逐步分解完全矿化,Langmuir-Hinshelwood模型分析结果表明其光催化降解过程符合为一级反应动力学。OMC/g-C_3N_4 composites were prepared by Ordered mesoporous carbon and Graphited carbon nitride simple low-temperature thermal treatment of the mixture of in varied mass ratio. The results of visible- light driven photodegradation of 2,4-DCP showed that the adsorptive and catalytic activities of OMC/g-C_3N_4 composites were both greatly enhanced, photo-catalytic removel efficiency of sample 0. 04-OMC/g-C_3N_4 was 3.68 times of pure g-C_3N_4 leaving out the adsorption. According to the results of GC-MS analysis of photo-degradation productions, 2,4-DCP were disintegrated into other intermediate products by the dechlorination and mathelation of generated hydroxyl radical, before being totally mineralized gradually, and the photocatalytic reaction were well fitted to the first order kinetics based on the Langmuir-Hinshelwood model.

关 键 词：介孔碳 石墨型氮化碳 光催化 2 4-氯酚 

分 类 号：O643.36[理学—物理化学]