掺镍多孔纳米SnO_2材料的制备及其气敏性能  

Preparation of Ni^(2+) doped SnO_2 mesoporous material and their gas sensing studies

作　　者：周旋[1] 陈高峰[1] 龙钰璇[1] 周寻[1] 宋文龙[1] 林志东[1] 

机构地区：[1]武汉工程大学湖北省等离子体化学与新材料重点实验室,湖北武汉430074

出　　处：《武汉工程大学学报》2010年第12期73-75,79,共4页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金项目(51072141);湖北省教育厅科学研究计划项目(Q20081503)

摘　　要：以SnCl4.5H2O为原料,聚乙二醇(PEG-1000)作为分散剂,利用沉淀法制备出SnO2纳米粉体,采用扫描电镜(SEM)和X-射线衍射(XRD)对其形貌和微观结构进行表征.并以其作为基底材料以离子的形式掺杂摩尔比为1%的Ni2+作为气敏材料,制作掺杂和未掺杂两种旁热式气敏元件,测试其对乙醇、甲醇和丙酮的气敏特性.发现在较低的工作温度下两种元件对三种气体都有较高的敏感性,同时Ni离子的掺杂对三种气体的灵敏度有不同的影响,对乙醇表现出很好的选择性.Nanometer SnO2 powder was prepared by precipitation using SnCl4 · 5H2O as raw materials and PEG--1000 as dispersant, the morphology and microstructure were characterized by SEM and XRD. The indirect heating gas sensors were prepared using nano-SnO2 and nano-SnO2 doped by metallic ions Ni2＋. Gas sensitivity of the sensor to ethanol, methanol and Acetone was studied. The results show that two sensors has high sensitivity to the three gases. Meanwhile, the Ni addition have different effect on the gas sensitivity to the three gases, and good selectivity to ethanol.

关 键 词：多孔纳米SnO2 聚乙二醇 气敏性能 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]