ZnO纳米棒的微波合成及Pt掺杂对其气敏性能的改善  

Microwave-assisted synthesis of ZnO nanorods and enhancement of their gas sensing properties caused by Pt doping

作　　者：吴诗德[1] 宋彦良[1] 李超[1] 夏同驰[1] 卫应亮[1,2] 

机构地区：[1]郑州轻工业学院,河南省表界面科学重点实验室,郑州450002 [2]洛阳理工学院环境工程与化学系,洛阳471023

出　　处：《化工新型材料》2011年第5期70-73,共4页New Chemical Materials

基　　金：国家自然科学基金(20871107);河南省杰出青年科学基金(0612002700);河南省教育厅自然科学基金(No.2009A150031)资助项目

摘　　要：以Zn（NO3）2.6H2O和NaOH为原料,CTAB为表面活性剂,微波加热到90℃,反应30min,成功制备了ZnO纳米棒。X射线衍射仪（XRD）和扫描电镜（SEM）结果表明,产物是六方纤锌矿结构ZnO纳米棒,长度为1~5μm,直径为50~100nm左右。对ZnO纳米棒进行了Pt掺杂,并对掺杂前后的气敏性能进行了对比研究。与未掺杂Pt的ZnO纳米棒相比,掺杂Pt的ZnO纳米棒对H2S气体的灵敏度和选择性大幅提高,在工作温度为273℃时,对体积分数为50ppm（10-6）的H2S灵敏度为480.44。这些结果说明,Pt掺杂的ZnO纳米棒是有潜力的探测H2S气体的气敏传感器材料。ZnO nanorods were prepared by a microwave-assisted solution reaction process using zinc nitrate and sodium hydroxide as the raw materials and CTAB as the surfactant at 90℃ for 30 mins.The results of the X-ray diffraction（XRD）and scanning electron microscopy（SEM） showed that the products were hexagonal zincite-structure ZnO nanorods with the length was about 1~5 μm and diameter was about 50~100nm.The gas sensitive properties to H2S were improved by doping Pt.The experiments showed that the sensitivity of the Pt-doped ZnO nanorods to 50×10-6（volume percentage） H2S is up to 480.44 at 273℃.These results indicated that the Pt-doped ZnO nanorods were a potentially promising material for detecting H2S.

关 键 词：氧化锌纳米棒 水热法 气敏性质 

分 类 号：TB383.1[一般工业技术—材料科学与工程]