金属Pd掺杂ZnO纳米材料的制备及其气敏性能研究  

Synthesis of Pd Doped ZnO Nanomaterials and Its Gas Sensing Properties

作　　者：岳丽娟[1] 刘春彦[1] 酒倍倍 常立玉 巩飞龙[1] 张永辉[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《河南化工》2016年第7期14-18,共5页Henan Chemical Industry

基　　金：国家自然科学基金(21301158);河南省科技厅科技创新杰出青年项目(164100510011);河南省教育厅高等学校骨干教师项目(2014GGJS-081);郑州轻工业学院校骨干教师项目(2012XGGJS04)

摘　　要：以氯化锌、尿素、聚乙烯吡咯烷酮为原料,不同配比的乙醇和水为反应溶剂,用水热法制备出尺寸、形貌不同的ZnO纳米材料。采用X射线衍射(XRD)、场发射扫描电镜(FESEM)、透射电镜(TEM)研究产物的组成、结构及形貌。表征结果显示三种不同反应条件分别生成了刺球状、雪片状和片球状三种不同形貌的ZnO,经过自组装过程在ZnO材料表面掺杂上纳米Pd颗粒,气敏性能测试结果表明:负载纳米Pd颗粒的ZnO灵敏度比纯ZnO灵敏度有不同程度的提高,研究表明金属Pd颗粒掺杂的ZnO为丙酮传感器的理想材料。ZnO nanomaterials with various morphologies are synthesized by hydrothermal method using Zn Cl_2,urea and PVP as raw materials,different proportions of ethanol and water as the reaction solvent.The structures and morphologies of ZnO are characterized by X- ray diffraction（ XRD）,field emission scanning electron microscope（ FESEM） and transmission electron microscope（ TEM）. The result shows that three ZnO nanocrystals are synthesized with different morphologies. The gas sensing property toward different organic molecules are systematic studied. The gas sensing results indicate that three kinds of the structures have different gas sensing properties. ZnO with hedgehog- like structure shows the best gas sensing property under the same situation compared with the others. The surfaces of ZnO nanoparticles are modified with Pd nanoparticles based on a self- assembly approach. The sensing performances of the acetone sensors can be further improved dramatically after doping Pd nanoparticles. The results indicate that Pd doped ZnO could be ideal acetone sensing materials.

关 键 词：纳米氧化锌 水热合成 Pd掺杂 气敏性能 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ134.41[化学工程—无机化工]