杨桃状ZnO纳米片微球的制备及气敏性能的研究  

Fabrication of ZnO Nanosheets Based Carambola-Like Microspheres and Gas Sensor Properties

作　　者：李博[1] 刘顺强[2] 刘磊[1] 崔玉明[1] 郭学锋[2] 周幸福[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009 [2]南京大学化学化工学院,南京210003

出　　处：《无机化学学报》2010年第4期591-595,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金重点项目(No.20636020);江苏省科技支撑计划(No.BE2009679);江苏省高校自然科学研究计划(No.08KJB150009)资助

摘　　要：以六水合硝酸锌和尿素为原料,水为反应介质,油酸作为表面活性剂,经水热过程合成了由纳米片组装的碱式碳酸锌微球前驱体,经煅烧后得到形貌一致的氧化锌(ZnO)纳米片组装的杨桃状微球。采用X射线衍射仪(XRD)和环境扫描电镜(SEM)对样品进行表征,结果表明产物为六方纤维矿结构的ZnO,微球尺寸比较均一,直径约为20μm,组装单元扇形ZnO纳米片均匀排列,单元之间存在均匀空隙,BET测试显示纳米片呈现多级介孔结孔结构,比表面积为18.9m2·g-1,室温下的光致发光性能表明其结构表面存在大量氧空位,对产物ZnO气敏元件进行了乙醇和丙酮气体敏感性测试。Zn4（CO3）（OH）6·H2O were prepared via the hydrothermal process by using zinc nitrate hexahydrate and urea as the raw materials, oleic acid as the template agent. The corresponding ZnO nanosheets-based carambola-like micropheres was obtained after calcinations of precursors. The samples were characterized by using X-ray diffraction （XRD） and scanning electron microscopy（SEM）. Work shows the product was the hexagonal wurtzite structure of ZnO, and has a homogeneous size distribution of 20 μm. Room-temperature photoluminescence （PL） spectra appear there are large numbers of oxygen vacancies on the ZnO surface. The gas sensing has been tested. Result indicates that of ZnO nanostructure has high sensitivity and short response time to ethanol and acetone gases.

关 键 词：水热合成 ZnO 杨桃状 油酸 气敏 氧空位 

分 类 号：O614.241[理学—无机化学]