Synthesis and NH3/TMA sensing properties of CuFe2O4 hollow microspheres at low working temperature

• 作者: Kai-Di Wu Jin-Yong Xu Marc Debliquy Chao Zhang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1768-1777
• 页数: 10页
• 语种: 英文

摘要

In this work,CuFe2O4 hollow microspheres assembled with nanosheets(CuFe2O4 HMANs)were syn-thesized 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 cru-cial role in the final products.All samples demonstrated hollow spherical morphology assembled with nanosheets or nanoparticles.The CuFe2O4 HMANs annealed at 400℃ exhibited the best n-type conductometric sensing properties toward low-concentration NH3 at 100℃ and 49％ RH.The sensor response to 10×10-6 NH3 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 condi-tion,while a response of 3.95 to trimethylamine(TMA).The CuFe2O4 HMANs-based NH3 sensor also exhibited good selectivity and excellent reproducibility.Therefore,this work provided a novel promised sensing material of low-concentration NH3 and TMA for real-time monitoring.