SnO_(2)/ZnS异质结气体传感器的制备及其室温NO2敏感特性  

Preparation and room-temperature NO_(2)sensitivity of SnO_(2)/ZnS heterojunctions gas sensor

作　　者：董逸蒙 孙永娇 侯煜晨 王炳亮 陆志远 张文栋[1] 胡杰[1] Dong Yi-Meng;Sun Yong-Jiao;Hou Yu-Chen;Wang Bing-Liang;Lu Zhi-Yuan;Zhang Wen-Dong;Hu Jie(College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030600,China)

机构地区：[1]太原理工大学电子信息与光学工程学院,太原030600

出　　处：《物理学报》2023年第16期44-51,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61904122,62171308);山西省回国留学人员科研经费(批准号:2022-071,2022-070)资助的课题.

摘　　要：采用水热法一步合成二维(2D)纳米片组成的SnS_(2)/ZnS微花结构,在空气气氛中煅烧获得不同组分的微花复合结构,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线能谱仪(EDS)、透射电子显微镜(TEM)和气敏特性分析仪,研究了煅烧温度对微花结构组分和气敏性能的影响.结果表明:450℃煅烧得到的SnO_(2)/ZnS(SZ-450)微花结构的室温NO_(2)气敏性能优于其他煅烧温度得到的微花结构,其室温下对体积分数为10^(-4) NO_(2)的响应值可达27.55,响应/恢复时间为53 s/79 s,理论检测下限低至2.1×10^(-7)(体积分数),并具有良好的选择性、重复性和稳定性.分析认为SZ-450元件优异的室温气敏特性与SnO_(2)和ZnS之间的异质结有关,本文可为室温NO_(2)气体传感器提供敏感材料,推动其研发及应用进程.SnS_(2)/ZnS microflower structures are prepared by one-step hydrothermal method.The microflower structures with different components are obtained after calcinating SnS_(2)/ZnS in air atmosphere.The influences of calcination temperature on the components and gas-sensing properties of microflower structures are investigated by X-ray diffractometry(XRD),scanning electron microscopy(SEM),X-ray energy dispersive spectroscopy(EDS),transmission electron microscopey(TEM),and gas sensitive characteristic analyzer.The results show that the gas-sensing performance to NO_(2) at room temperature of SnO_(2)/ZnS microflower structure(SZ-450)is better than that of microflower structure calcinated at the other temperature.The response of SZ-450-based sensor to 10^(-4) NO_(2) at room temperature can reach 27.55,the response/recovery time is 53 s/79 s,the theoretical detection limit is as low as 2.1×10^(-7),and it has good selectivity,repeatability,and stability.The analysis indicates that the excellent room-temperature gas-sensing characteristic of SZ-450 is related to the heterojunction between SnO_(2) and ZnS.This work can provide sensitive materials for room-temperature NO_(2) gas sensor and promote its development and application.

关 键 词：SnO_(2)/ZnS 气体传感器 NO_(2)检测 室温 

分 类 号：X831[环境科学与工程—环境工程] TB34[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]