
第30卷第12期 2017年12月
传感技术学报
CHINESE JOURNAL OF SENSORS AND ACTUATORS
Vol. 30No. 12 Dec.2017
ImprovementofSnO,GasSensingPropertiesbyUsingY-Zeolite HUANGQingpan',SUNYanhui,2,ZHAO Ziyao',WANGXiaofeng",WANGJing( 1.Faculty of Electronic Information and Electrical Engineering, Dalian U/nitersity of Technofogy, Dalian Liaoning 116023, China;
2. College of Information and Communication Engineering , Dalian Minzu /ninersity, Dalian Liaoning 116600, Chind
3. &chool of Mathematical and Physical Sciences,Panjin Campus, Dalian /nizersily of Technology, Panjin Liaoning 124000, China, )
Abstract: In order to improve the sensitivity of the gas sensor, the SnO, gas sensor was modified with Y-zeolite by coating Y-zeolite on the surface of SnO, and mixing SnO,and Y-zeolite, respectively. The structure andsurface prop-erties of the composites made by mixing SnO, and Y-zeolite were characterized by using X-ray diffraction( XRD) and scanning electron microscopy ( SEM) , respectively. Some VOC gases were tested by using these two types of sensors. The results show that compared with pure SnO, gas sensor, the response value of the sensor made of mixing SnO. and Y-zeoliteto acetone increases, and to other gases are not change obviously. The response value of the sensol made of coating method increase to acetone ,meanwhile decrease to ethanol vapor,indicating an inhibit act to etha
nol.The mechanism of Y-zeoliteimprove the SnO2 gas sensing properties was briefly analyzed. Key words : gas sensor; Y-zeolite ; SnO, ;sensitive property
EEACC:7230
doi :10.3969/j.issn.10041699.2017.12.005
Y沸石改善SnO,气体传感器性能的研究
黄庆盼",孙炎辉12,赵梓尧",王小风”,王1*
(1.大连理工大学电子与信息工程学部,辽宁大连116023;2.大连民族大学信息与通信工程学院,辽宁大连116600:
3.大连理工大学盘锦校区基础部,辽宁盘锦124000)
摘要:为了改善气体传感器的感性能,分别采用SnO,外涂Y沸石的涂覆法和Y沸石与SnO,混合法,用Y沸石对SnO 气体传感器进行改性。用X-射线衍射(XRD)、电子扫描显微镜(SEM)对混合法制备的Y沸石/SnO,复合材料的结构和表面
关键词:气体传感器:Y-沸石;SnO:披感性能
中图分类号:TP212.2
文献标识码:A
VOC气体对人体危害极大(1-4],对检测VOC气体的传感器性能要求也越来越高,SnO2、ZnO等半导体材料作为敏感材料广泛用于气体传感器[5-]】,但目前应用的传感器的缴感性能还不能完全满足实际测试的要求,还有提高的必要和空间。这些性能包括:响应时间、响应值、工作温度、选择性、稳定性等。在半导体敏感材料中掺杂或者与其他材料复合,是改善材料敏感性能的简单而有效的方法之一,被广泛采用。在掺杂改善SnO,缴感性能方面,Leite[8] 用Nb,O,添加剂来控制SnO,材料的尺寸,此方法能有效缩减SnO,传感器的响应时间。Liml9]在合成SnO,材料过程中加人Pb,能有效提高SnO,传感
项目来源:国家自然科学基金项目(61574025,51602035)
收稿日期:2017-05-17
修改日期:2017-07-06
文章编号:1004-1699(2017)12-1808-07
器对CH,、C,H。和CO的响应灵敏度。陈翔宇等[10] 利用Sb掺杂提高SnO,气体传感器响应值,6%Sh 掺杂使SnO,基传感器对0.1%H,的最佳响应值从 115mV提高到435mV.其机理认为Sb掺杂降低了 SnO,气敏材料电阻,从而提高SnO,传感器的响应值。陈伟根等[]采用CuO掺杂SnO,后形成许多 P-n结,从而使CuO-SnO,复合材料气体传感器对 H,表现出更高的响应灵敏度和更快的响应特性。
沸石材料具有独特的多孔和超笼结构,其筛选、吸附、催化等特性使其广泛应用于材料、化工等领域[12-16]。沸石比表面积大,具有高效吸附性;不同类型的沸石有不同大小的孔径和超笼,对分子的大