Sulfur dioxide gas sensing at room temperature based on tin selenium/tin dioxide hybrid prepared via hydrothermal and surface oxidation treatment

作     者：Qian-Nan Pan Zhi-Min Yang Wei-Wei Wang Dong-Zhi Zhang Qian-Nan Pan;Zhi-Min Yang;Wei-Wei Wang;Dong-Zhi Zhang

作者机构：College of Control Science and EngineeringChina University of Petroleum(East China)Qingdao 266580China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第6期

页      面：1588-1596页

核心收录：

学科分类：07[理学] 0806[工学-冶金工程] 08[工学] 070602[理学-大气物理学与大气环境] 0805[工学-材料科学与工程（可授工学、理学学位）] 0706[理学-大气科学] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China (No.51777215) the Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology),Ministry of Education (No.KFZ1801) 

主　　题：SO_(2)gas sensor Room temperature detection Core-shell structure SnSe/SnO_(2)composite Debye length 

摘      要：In this paper,a novel SnSe/SnO_(2) nanoparticles(NPs) composite has been successfully fabricated through hydrothermal method and surface oxidation *** as-prepared sample was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM).A series of morphological and structural characteristics confirm that the SnSe/SnO_(2) NPs composite shows a core-shell structure with a SnO_(2) shell with thickness of 6 *** prepared SnO_(2) NPs and SnSe/SnO_(2) NPs composite were applied as gas-sensing materials,and their gas-sensing properties were investigated at room temperature *** results show that the response value of the SnSe/SnO_(2) composite sensor toward 100×10^(-6) SO_(2) is 15.15%,which is 1.32 times higher than that of pristine SnSe(11.43%).And the SnSe/SnO_(2) composite sensor also has a detection limit as low as 74×10^(-9) and an ultra-fast response *** enhanced gas-sensing performance is attributed to the formation of p-n heterojunction between SnSe and SnO_(2) and the appropriate SnO_(2) shell thickness.