不同前驱体CNX-CS催化剂的构筑及其性能  

Preparation and activity of CNX-CS catalysts with different precursor

作　　者：闫青云 赵朝成[1,2] 王帅军 张亮 YAN Qing-yun;ZHAO Chao-cheng;WANG Shuai-jun;ZHANG Liang(College of Chemical Engineering,China University of Petroleum (East China),Qingdao 266580,China;State Key Laboratory of Petroleum Pollution Control,Beijing 102206,China)

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580 [2]石油石化污染物控制与处理国家重点实验室,北京102206

出　　处：《应用化工》2019年第2期253-257,共5页Applied Chemical Industry

基　　金：国家科技重大专项项目(2016ZX05040003)

摘　　要：分别以三聚氰胺、尿素、硫脲为前驱体,采用高温焙烧法制备出不同的g-C_3N_4(CNX)材料,通过共混交联法将g-C_3N_4与壳聚糖(CS)进行复合,制得易再生、高稳定性的CNX-CS催化剂材料。采用扫描电镜(SEM)、X射线衍射图谱(XRD)、傅里叶变换红外(FTIR)等进行了表征,并对其进行了光催化性能评价。结果表明,来自于不同前驱体的g-C_3N_4均匀的分散在CS基质表面,复合过程中各自的结构得到了保持。以硫脲为前驱体的CNT-CS催化剂材料表现出最佳的吸附性能和催化性能协同作用,在5次循环实验之后降解率仍能达到95%,质量损失不超过10%。反应后的催化剂可通过简单加入氢氧化钠和过氧化氢进行再生。该研究对于易再生g-C_3N_4基催化剂的设计和水处理方面应用提供了良好基础。This study fabricated graphitic carbon nitride materials with different precursors via high temperature calcination using melamine,urea and thiourea as precursors,then graphitic carbon nitride with different were mixed with chitosan to obtain the CNX-CS catalyst material which is easy to regenerate and has high stability.The prepared material was characterized by scanning electron microscopy(SEM),thermogravimetric analysis(TGA),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR).The results show that graphitic carbon nitride prepared by different precursors is uniformly distributed on the chitosan matrix,and the structure is maintained during the fabrication process.The CNT-CS catalyst whose precursor is thiourea showed the best synergistic effect of adsorption and catalysis.After 5 cycles in the test,the rate of dissolution can still reach 95%,the mass change less than 10%.The reacted catalyst can be regenerated by simply adding sodium hydroxide and hydrogen peroxide.This study provides a good basis for the design and water treatment applications of easily regenerated g-C 3N 4-based catalysts.

关 键 词：共混交联法 CNX-CS 亚甲基蓝 光催化 再生 

分 类 号：TQ319[化学工程—高聚物工业] X703[环境科学与工程—环境工程]