Surface microstructure-controlled ZrO_(2) for highly sensitive room-temperature NO2 sensors  

作　　者：Yuhua Yan Zongtao Ma Jingyao Sun Miaomiao Bu Yanming Huo Ziying Wang Yunfei Li Ning Hu 

机构地区：[1]Tianjin Key Laboratory of Electronic Materials and Devices,School of Electronics and Information Engineering,Hebei University of Technology,5340 Xiping Road,Tianjin,300401,PR China [2]State Key Laboratory of Reliability and Intelligence Electrical Equipment,Hebei University of Technology,Tianjin,300130,PR China [3]National Engineering Research Center for Technological Innovation Method and Tool,And School of Mechanical Engineering,Hebei University of Technology,Tianjin,300401,PR China [4]Center for Advanced Laser Technology,Hebei University of Technology,Tianjin,300401,PR China [5]Hebei Key Laboratory of Advanced Laser Technology and Equipment,Tianjin,300401,PR China

出　　处：《Nano Materials Science》2021年第3期268-275,共8页纳米材料科学（英文版）

基　　金：supported by the Natural Science Foundation of Hebei Province(Project No.F2020202050);the National Natural Science Foundation of China(Grant No.62004059,11632004 and U1864208);the Key Program for International Science and Technology Cooperation Projects of the Ministry of Science and Technology of China(No.2016YFE0125900);National Science and Technology Major Project(2017-VII-0011-0106);Science and Technology Planning Project of Tianjin(20ZYJDJC00030);the Key Program of Research and Development of Hebei Province(202030507040009);the Fund for Innovative Research Groups of Natural Science Foundation of Hebei Province(A2020202002);the Key Project of Natural Science Foundation of Tianjin(S20ZDF077).

摘　　要：The high sensitivity of room-temperature gas sensors is the key to innovation in the areas of environment,energy conservation and safety.However,metal-oxide-based sensors generally operate at high temperatures.Herein,we designed three ZrO_(2)-based sensors and explored their NO_(2)sensing properties at room temperature.ZrO_(2)with three different morphologies and microstructure were synthesized by simple hydrothermal methods.The microstructures of sensing materials are expected to significantly affect gas sensing properties.The rod-shaped ZrO_(2)(ZrO_(2)-R)displayed the advantages such as higher crystallinity,larger pore size,narrower band gap and more chemisorbed adsorbed oxygen,compared to hollow sphere-shaped ZrO_(2)(ZrO_(2)-HS),stellate-shaped ZrO_(2)(ZrO_(2)–S).The ZrO_(2)-R sensor showed the highest response towards 30 ppm NO_(2)(423.8%)at room temperature,and a quite high sensitivity of 198.0%for detecting 5 ppm NO_(2).Although ZrO_(2)-HS and ZrO_(2)–S sensors exhibited lower response towards 30 ppm NO_(2)(232.9%and 245.1%),the response time and recovery time of these two sensors are 5 s/19 s and 4 s/3 s,respectively.This work can provide a new strategy for the development of roomtemperature metal-oxide-based sensors.

关 键 词：ZrO_(2) Room temperature MICROSTRUCTURE Chemisorbed adsorbed oxygen NO_(2) 

分 类 号：TQ134.12[化学工程—无机化工] TP212[自动化与计算机技术—检测技术与自动化装置]