纳米CdS的配位沉淀合成及酒敏性能研究  

C_2H_5OH sensing properties of nanosized CdS prepared by coordination-precipitation

作　　者：娄向东[1] 刘淑萍[1] 王晓兵[1] 师东阳[1] 席国喜[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,新乡453007

出　　处：《功能材料与器件学报》2005年第4期485-488,共4页Journal of Functional Materials and Devices

基　　金：河南省自然科学基金资助项目(0211062500)

摘　　要：用配位沉淀法在柠檬酸体系中合成了纳米CdS,用X-射线衍射(XRD)对产物进行物相分析,结果表明产物为立方闪锌矿结构,其粒径为25nm左右。将样品制成旁热式气敏元件进行测试,结果表明以CdS为基体的气敏元件在230℃时对0.005vol%乙醇气体的灵敏度高达45,对汽油、甲醇、丙酮等气体具有较好的选择性。The nanocrystalline CdS was preparaed by coordination-precipitation method in the system of citrate. The results from X - ray diffraction （XRD） indicate that the products are of cubic zinc blende structure, the mean size of the CdS powders is about 25nm. The gas - sensing characteristics were studied and the results reveal that the sensors based on CdS show a high sensitivity and selectivity to ethanol gas. And its sensitivity to 0. 005vol% ethanol gas can reach 45 at 230℃.

关 键 词：纳米CDS C2H5OH 气敏元件 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]