Abstract
Metal oxide semiconductors(MOSs)are ideal sensing materials for detecting volatile organic compounds due to their low cost,diversity,high stability,and ease of production.However,it remains a grand challenge to develop the MOSs-based gas sensors for sensing iso-propanol with desired performance via a simple,effective,and controllable method.Herein,we reported the prepa-ration of the Al-doped ZnO(AZO)/WO3 heterostructure films by directly depositing the AZO coating onto the WO3 coating using a strategy of magnetron sputtering.The AZO/WO3 heterostructure films were constructed by numbers of irregular nanoparticles that were intercon-nected with each other.The AZO/WO3 heterostructure films-based gas sensors exhibited excellent isopropanol-sensing performance with high response,promising selec-tivity,low detection limit,fast response rate,wide detec-tion range,and ideal reproducibility.The promising isopropanol-sensing performance of the AZO/WO3 heterostructure films arises mainly from their high unifor-mity,unique microstructures with high surface roughness,and the construction of the heterostructure between the AZO and WO3 coatings.This work provides a versatile approach to prepare the MOSs-based heterostructure films for assembling the gas sensors.
基金项目
National Natural Science Foundation of China(52172094)
National Natural Science Foundation of China(22209105)
Shanghai Municipal Natural Science Foundation(21ZR1426700)
the"Shuguang"Program of Shanghai Education Commission(19SG46)
NETL
NSTL
万方数据