Enhanced ethanol sensing performance of N-doped ZnO derived from ZIF-8

• Published in: 中国化学快报（英文版） Vol. 34; no. 2; pp. 317 - 321
• Main Authors: Huifen Fu, Ziyue Feng, Shan-Shan Liu, Peng Wang, Chen Zhao, Chong-Chen Wang
• Format: Journal Article
• Language: English
• Published: Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation/Beijing Energy Conservation and Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China 2023
• Subjects: ZIF-8; Urea-assisted pyrolysis; N-doped ZnO; Gas sensor; Oxygen vacancy
• ISSN: 1001-8417; 1878-5964

Metal oxides derived from metal-organic framework(MOF)have attracted considerable attention due to its excellent performance and unique structure.Doping is considered as an effective method to improve gas-sensing performance.However,nonmetal doped metal oxides derived from MOF as gas-sensing ma-terials have not been reported.Within this work,N atoms were successfully doped into the lattice of ZnO nanoparticles using ZIF-8 as a self-sacrificial template through a thermal treatment process with the assistant of urea.The obtained N-ZnO exhibited competitive ethanol-sensing performance,in which the response value of N-ZnO-5 to 100 ppm ethanol reached 115 at 190℃with a satisfactory selectivity.It was found that the N-doping in ZnO facilitated the formation of oxygen vacancy that promoted the gen-eration of adsorbed oxygen species to achieve the enhanced gas-sensing performance.Besides,the larger specific surface area resulting from the size reduction during the urea-assisted pyrolysis process can also be responsible for the improving of the ethanol-sensing performance.