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

作     者：Huifen Fu Ziyue Feng Shan-Shan Liu Peng Wang Chen Zhao Chong-Chen Wang Huifen Fu;Ziyue Feng;Shan-Shan Liu;Peng Wang;Chen Zhao;Chong-Chen Wang

作者机构：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 CenterBeijing University of Civil Engineering and ArchitectureBeijing 100044China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第2期

页      面：317-321页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 21806008, 21876008) Science and Technology General Project of Beijing Municipal Education Commission, China (No. KM202110016010) 

主　　题：ZIF-8 N-doped ZnO Gas sensor Oxygen vacancy Urea-assisted pyrolysis 

摘      要：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 materials 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 generation 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.