Core-shell TiO_(2)/ZnO nanorod array films on FTO:Two-step synthesis and improved ethanol sensing performance

作     者：Xiangli An Bowen Zhang Chongyang Wang Zhiyong Zhao Saisai Zhang Hari Bala Zhanying Zhang Xiangli An;Bowen Zhang;Chongyang Wang;Zhiyong Zhao;Saisai Zhang;Hari Bala;Zhanying Zhang

作者机构：School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo454000China Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan ProvinceHenan Polytechnic UniversityJiaozuo454000China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2023年第9卷第4期

页      面：725-734页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the Youth Project of Henan Natural Science Foundation(212300410149) the National Natural Science Foundation of China(62101177) the Key Scientific Research Project of Colleges and University in Henan Province(21A430019). 

主　　题：Core-shell structure TiO_(2)/ZnO Nanorod arrays Heterojunction Gas sensor 

摘      要：In this work,highly regular TiO_(2)nanorod array films were synthesized in situ on FTO by a facile hydrothermal method,and then ZnO shell layers were grown on the surface of the nanorods to form a coreshell structure via an ion-layer adsorption-reaction way.Compared to the TiO_(2)nanorods,the prepared TiO_(2)/ZnO nanocomposites exhibited enhanced ethanol sensing performances,including a low working temperature,higher sensitivity,and faster response capability.The optimum sensor based on 2c-TiO_(2)/ZnO exhibited the maximum response value of 30.85 toward 50×10^(-6)C_(2)H_(5)OH at 340℃,which was almost 4.15 times higher than that of the TiO_(2)sensor.The improved ethanol sensing mechanism was discussed in relation to the unique nanorod array structure and the heterojunctions between TiO_(2)and ZnO.