Synthesis and NH_(3)/TMA sensing properties of CuFe_(2)O_(4) hollow microspheres at low working temperature  

作　　者：Kai-Di Wu Jin-Yong Xu Marc Debliquy Chao Zhang 

机构地区：[1]College of Mechanical Engineering,Yangzhou University,Yangzhou 225127,China [2]Materials Science Department,University of Mons,Mons 7000,Belgium

出　　处：《Rare Metals》2021年第7期1768-1777,共10页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(No.51872254);the National Key Research and Development Program of China(No.2017YFE0115900);Yangzhou City-Yangzhou University Cooperation Foundation(No.YZU201801)。

摘　　要：In this work,CuFe_(2)O_(4) hollow microspheres assembled with nanosheets(CuFe_(2)O_(4) HMANs)were synthesized using a solvothermal method followed by an annealing treatment.The effects of annealing temperature on microstructure,chemical composition and gas sensing characteristics of as-prepared samples were investigated.The results showed that annealing treatment played a crucial role in the final products.All samples demonstrated hollow spherical morphology assembled with nanosheets or nanoparticles.The CuFe_(2)O_(4) HMANs annealed at400℃exhibited the best n-type conductometric sensing properties toward low-concentration NH3 at 100℃and49%RH.The sensor response to 10×10^(-6)NH_(3) was 4.0 with a rapid response time of 32 s,and it even showed a response of 1.2 toward 1×10^(-6)NH3 at the same condition,while a response of 3.95 to trimethylamine(TMA).The CuFe_(2)O_(4) HMANs-based NH_(3) sensor also exhibited good selectivity and excellent reproducibility.Therefore,this work provided a novel promised sensing material of low-concentration NH_(3) and TMA for real-time monitoring.

关 键 词：Copper ferrite Hollow microspheres Gas sensor AMMONIA TRIMETHYLAMINE 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TS254.7[自动化与计算机技术—控制科学与工程] TB34[轻工技术与工程—水产品加工及贮藏工程]