季铵盐插层MXene复合材料的制备及其电容脱盐性能  

Preparation of quaternary ammonium salt intercalated MXene composites and its capacitive desalination performance

作　　者：魏文慧 梁斌[1] 李佳璇 罗民[1] WEI Wen-hui;LIANG Bin;LI Jia-xuan;LUO Min(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,化学化工学院,宁夏银川750021

出　　处：《化学研究与应用》2022年第2期381-390,共10页Chemical Research and Application

基　　金：宁夏自然科学基金项目(2020AAC03019)资助。

摘　　要：以MXene(Ti_(3)C_(2)T_(x))为前驱体,采用季铵盐(TTAB、CTAB、STAB)为插层剂,制备季铵盐插层MXene复合材料。研究表明,随着季铵盐烷基碳链原子数的增加,MXene的层间距逐渐增大,复合材料的电容脱盐性能随层间距的增加而逐步提高。NaCl溶液浓度为1000 mg·L^(-1),工作电压为1.2 V时,MXene、MXene@TTAB、MXene@CTAB和MXene@STAB电极的脱盐量分别为47.4、67.2、74.0和82.0 mg·g^(-1),MXene@STAB电极进行10次CDI循环性能测试后,脱盐量仍可保持原来的86.2%。In this paper,quaternary ammonium salts intercalated MXene composites were prepared using MXene(Ti_(3)C_(2)T_(x)) as precursor and different carbon chain length quaternary ammonium salts as intercalation agent for capacitive deionization.The results show that the layer spacing of MXene gradually increases with the number of alkyl carbon chain atoms of quaternary ammonium salt.The layer spacing of MXene gradually increases,and the desalination performance gradually improves with the increase of layer spacing.The salt removal capacity of MXene,MXene@TTAB,MXene@CTAB and MXene@STAB electrode can reach 47.4 mg·g^(-1),67.2 mg·g^(-1),74.0 mg·g^(-1) and 82.0 mg·g^(-1) under the cell voltage of 1.2 V in NaCl solution with a concentration of 1000 mg·L^(-1).After 10 cycles,the capacity retention rate of MXene@STAB electrode remains at 86.2%.

关 键 词：季铵盐 MXene插层复合材料 电容去离子 脱盐 

分 类 号：O646[理学—物理化学]