Ti_(3)C_(2)系MXene原位制备方法的研究及其二维膜的结构调控  

Study on the in-situ preparation of Ti_(3)C_(2)-based MXene and structure regulation of its two-dimensional membrane

作　　者：渠深圳 刘峤 王青[1] 范茏 董强[1,2] 徐农 Qu Shenzhen;Liu Qiao;Wang Qing;Fan Long;Dong Qiang;Xu Nong(School of Energy,Materials and Chemical Engineering,Hefei University,Hefei 230601;State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]合肥学院能源材料与化工学院,合肥230601 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《化工新型材料》2024年第1期161-165,177,共6页New Chemical Materials

基　　金：安徽省重点研究和开发计划项目(2022a05020041);安徽省教育厅重点项目(KJ2020A0669,KJ2021A1015);中国科学院过程工程研究所生化工程国家重点实验室开放基金(IPE-CAS-20190320);合肥学院人才科研基金项目(20RC33)。

摘　　要：作为具有代表性的二维纳米材料之一,MXene通过层层堆叠可以构建具有分子筛分通道的新型二维分离膜。利用氟化锂/盐酸原位生成氢氟酸的方法,系统地研究了刻蚀液浓度对碳化钛(Ti_(3)C_(2))系MXene纳米片结构的影响,并利用热处理探究了MXene二维膜的结构演变。结果表明,当刻蚀剂中F^(-)的摩尔质量是Al^(3+)的7倍及以上时,能获得较好的单层MXene,且纳米片层之间的层间距随着刻蚀剂中F^(-)浓度的提高而增大;利用热自交联反应,可以在增强纳米片层与片层之间作用力的同时,改变纳米片的层间距。MXene,as a representative two-dimensional(2D) nanomaterials,can construct a new two-dimensional separation membrane with molecular sieving channels by stacking layer by layer.The effects of etching fluid concentration on the structure of T_(3)C_(2)-based MXene nanosheets were systematically studied using in-situ generation of hydrofluoric acid from lithium fluoride(LiF)/hydrochloric acid.The structure evolution of MXene 2D membranes was explored by simple heat-treatment.The results showed that when the molar mass of F^(-) in the etchant was 7 times or more than that of Al^(3+),better single-layer MXene could be obtained,and the layer-spacing between the nanosheet layers increased with the increase of F^(-) concentration in the etchant.Using the thermal self-crosslinked reaction,the layer-spacing of the nanosheets could be changed while enhancing the force between the nanosheets.

关 键 词：MXene 结构演变 层间距 热自交联 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]