Polyethylene imine functionalized porous carbon framework for selective nitrogen dioxide sensing with smartphone communication  

作　　者：Xiaxia Xing Xiaoyu Chen Zhenxu Li Xinhua Zhao Yingying Tian Xiaoyan Lang Dachi Yang 

机构地区：[1]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Engineering Research Center of Thin Film Optoelectronics Technology,Ministry of Education and Department of Electronics,College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China

出　　处：《Chinese Chemical Letters》2024年第9期432-436,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52072184);Tianjin Research Innovation Project for Postgraduate Students(General Project,No.2022BKY035)。

摘　　要：Highly selective and remotely communicable nitrogen dioxide(NO_(2))sensing may contribute to future Internet of Things in environmental monitoring.However,room-temperature NO_(2)sensing materials such as carbon materials is still less than satisfactory due to their insensitive interaction with target gas.Here,polyethylene imine functionalized three-dimensional(3D)carbon framework(PEI/C framework)has been developed for enhanced selective NO_(2)sensing,via combined template synthesis and subsequent doping.Typically,the 3D PEI/C framework is observed porous shape with irregular coating.Beneficially,the response of C framework to NO_(2)increases while those of interfering gases decrease after being functionalized with PEI.Remarkably,the sensor prototypes show a 100 ppb-concentration detection limit at room temperature.Theoretically,such excellent NO_(2)sensing is attributed to the large specific surface ratio of porous 3D PEI/C framework,in which PEI serves as an active layer for target NO_(2),while a passivated one for interfering gases.Practically,such PEI/C framework sensor prototype is simulated for NO_(2)sensing device and communicated with a smartphone,showing great potential in future intelligent environmental monitoring.

关 键 词：PEI/C framework Nitrogen dioxide sensing Enhanced selectivity Smartphone communication Practical monitoring simulation 

分 类 号：X831[环境科学与工程—环境工程] O641.4[理学—物理化学]