文献类型：期刊文献

中文题名：Physicochemical regulations of nanoconfined two-dimensional spacing toward highly-selective NH_(3) sensing

作者：Tianshu Chu[1,2,3];Xinyuan Mao[1,2,3];Linfeng Li[1,2,3];Tao Wang[1,2,3];Xiaoyuan Wang[1,2,3,4];Bowei Zhang[1,2,3,4];Fu-Zhen Xuan[1,2,3]

机构：[1]Shanghai Key Laboratory of Intelligent Sensing and Detection Technology,East China University of Science and Technology,Shanghai 200237,China;[2]Key Laboratory of Pressure Systems and Safety of Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;[3]School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;[4]CPCIF Key Laboratory of Power Battery Systems and Safety,East China University of Science and Technology,Shanghai 200237,China

年份：2026

卷号：19

期号：1

起止页码：1145

中文期刊名：Nano Research

外文期刊名：纳米研究(英文版)

基金：supported by the National Natural Science Foundation of China(Nos.52422505 and 12274124);the Innovative Research Group Project of the National Natural Science Foundation of China(No.52321002).

语种：英文

中文关键词：two-dimensional(2D)materials;physicochemical regulation;ion intercalation;gas sensing;nanoconfined space

摘要：Nanoscale confinement environments often affect the transport mechanisms of nanofluids.Understanding the dynamic behavior of molecules in two-dimensional(2D)confined channels is of great importance in the areas of sensing,catalysis and energy storage.As a popular candidate for a new type of gas sensing material,MXenes have the problem of nonselectivity towards polar gases with slow responses,which severely limits their applications.Here,we report a study on regulating the confinement effect of 2D channels between MXene layers through annealing treatment and ion(Na^(+))intercalation for high-performance ammonia(NH_(3))sensing.Firstly,the annealing treatment accurately modulates the size of the 2D channels to effectively block the entry of large-size gas molecules and improve the selectivity for NH_(3).Ab initio molecular dynamics(AIMD)also confirms that the modulated channel size has a special"nano-pumping effect",which can accelerate the dynamic behavior of NH_(3) molecules in the 2D confined space.Moreover,the intercalation of Na+ions increases the adsorption capacity of NH_(3).Therefore,the"nano-pumping effect"and theintercalation of Na+ions effectively enhance the response speed and sensitivity of MXene to NH_(3),respectively.The experimental results show that the modified Ti_(3)C_(2) exhibits high sensitivity(0.17),rapid response(181 s),excellent selectivity and stability towards NH_(3).