Gadolinium-doped mesoporous tungsten oxides:Rational synthesis,gas sensing performance,and mechanism investigation  

作　　者：Yanyan Li Keyu Chen Yan Liu Junhao Ma Yaozu Liao Haitao Yang Jinsheng Cheng Qin Yue Kaiping Yuan Yuan Ren Yidong Zou Yonghui Deng 

机构地区：[1]Department of Chemistry,Department of Gastroenterology and Hepatology,Zhongshan Hospital,Zhangjiang Fudan International Innovation Center,State Key Laboratory of Molecular Engineering of Polymers,iChEM,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Fudan University,Shanghai 200433,China [2]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China [3]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China [4]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610051,China [5]Frontier Institute of Chip and System,Fudan University,Shanghai 200433,China [6]Henry-Fork School of Food Sciences,Shaoguan University,Shaoguan 512005,China

出　　处：《Nano Research》2023年第5期7527-7536,共10页纳米研究（英文版）

基　　金：the National Key R&D Program of China(No.2020YFB2008600);the National Natural Science Foundation of China(Nos.21875044,22125501,and 22105043);the Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(No.20JC1415300);the China Postdoctoral Science Foundation(Nos.2021TQ0066 and 2021M690660);the Fundamental Research Funds for the Central Universities(No.20720220010);the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,the young scientist project of MOE innovation platform,Donghua University(No.KF2120);the Foshan Science and Technology Innovation Program(No.2017IT100121).

摘　　要：As a typical family of volatile toxic compounds,benzene derivatives are massive emission in industrial production and the automobile field,causing serious threat to human and environment.The reliable and convenient detection of low concentration benzene derivatives based on intelligent gas sensor is urgent and of great significance for environmental protection.Herein,through heteroatomic doping engineering,rare-earth gadolinium(Gd)doped mesoporous WO_(3)with uniform mesopores(15.7–18.1 nm),tunable high specific surface area(52–55 m^(2)·g^(−1)),customized crystalline pore walls,was designed and utilized to fabricate highly sensitive gas sensors toward benzene derivatives,such as ethylbenzene.Thanks to the high-density oxygen vacancies(OV)and significantly increased defects(W^(5+))produced by Gd atoms doping into the lattice of WO_(3)octahedron,Gd-doped mesoporous WO_(3)exhibited excellent ethylbenzene sensing performance,including high response(237 vs.50 ppm),rapid response–recovery dynamic(13 s/25 s vs.50 ppm),extremely low theoretical detection limit of 24 ppb.The in-situ diffuse reflectance infrared Fourier transform and gas chromatograph-mass spectrometry results revealed the gas sensing process underwent a catalytic oxidation conversion of ethylbenzene into alcohol species,benzaldehyde,acetophenone,and carboxylate species along with the resistance change of the Gd-doped mesoporous WO_(3)based sensor.Moreover,a portable smart gas sensing module was fabricated and demonstrated for real-time detecting ethylbenzene,which provided new ideas to design heteroatom doped mesoporous materials for intelligent sensors.

关 键 词：mesoporous materials semiconductor metal oxides gadolinium doping gas sensor benzene derivatives 

分 类 号：O64[理学—物理化学]