TiO_2纳米材料对甲醛气体的气敏性能研究  

Gas Sensing Properties to Formaldehyde of TiO_2 Nanocrystalline

作　　者：赵萌[1] 王金兴[1] 邹博[1] 冯彩慧[1] 吴凤清[1] 

机构地区：[1]吉林大学化学学院,长春130012

出　　处：《微纳电子技术》2007年第7期108-110,共3页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(60374048);吉林省科技发展计划资助项目(2006528)

摘　　要：采用溶胶-凝胶法合成了对甲醛气体(HCHO)敏感的纳米晶TiO2材料。利用X射线衍射(XRD)、X射线光电子能谱(XPS)等测试方法对TiO2纳米晶结构和表面态进行了表征。X射线衍射结果表明,随温度的增加,TiO2的晶型会由锐钛矿型逐渐转变为金红石型。制成了敏感元件,对甲醛气敏性能进行了测试。测试结果表明,500℃下焙烧2h所制得的锐钛矿型TiO2对甲醛气体有很好的敏感性能。The nanocrystalline TiO2 sensitive to HCHO was prepared by the sol-gel method. Its crystal structure and surface morphology were characterized by means of X-ray diffraction（XRD） and X-ray photoelectron spectroscopy （XPS）. The XRD results indicated that TiOz gradually transformed from anatase to rutile with the increasing of calcining temperature. TiO2 sensors were prepared and their sensitivities to HCHO were tested. It reveals that the anatase TiO2, calcined at 500 ℃ for 2 h,has a good sensitivity for HCHO.

关 键 词：溶胶-凝胶 气体传感器 甲醛 

分 类 号：TB383[一般工业技术—材料科学与工程] O649[理学—物理化学]