【摘要】 以Zn(NO3)2.6H2O和NaOH为原料,CTAB为表面活性剂,通过微波辅助液相反应过程在低温下成功地制备了ZnO纳米棒。X射线衍射谱和扫描电镜结果表明,产物是六方纤锌矿结构ZnO纳米棒,长度为5~30μm,直径为0.1~1μm。气敏性能测试表明,所制备的ZnO纳米棒对H2S气体具有较好的选择性,但灵敏度不高。对ZnO纳米棒进行In掺杂后,对H2S气体的灵敏度和选择性大幅提高,在工作温度为332℃时,对体积分数为50×10-6的H2S灵敏度为29.217,说明In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。更多还原

【Abstract】 At a low temperature,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.The results of the X-ray diffraction(XRD)and scanning electron microscopy(SEM) show that the products are hexagonal zincite-structure ZnO nanorods,with the length about 5~30μm and diameter about 0.1~1μm.The experiments on gas sensitive pro-perties indicate that the as-prepared ZnO nanorods have a better selectivity to H2S than that to the other several gases,but the sensitivity of ZnO samples to these gases is low.The gas sensitive properties to H2S are improved by doping In.The sensitivity of the In-doped ZnO nanorods to 50×10-6(volume percentage) H2S is up to 29.217 at 332℃.These results indicate that the In-doped ZnO nanorod is a potentially promising material for detecting H2S.更多还原