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为了提高ZnO纳米线的酒敏特性,利用紫光激发经浸渍法获得Ag修饰的ZnO纳米线.利用扫描电子显微镜(SEM),X射线衍射仪(XRD)对修饰后的ZnO纳米线进行了晶体结构和形貌的表征.结果表明其晶体结构中既有六方纤锌矿结构的ZnO,又有面心立方的Ag.三维网络结构的ZnO纳米线的表面被一层致密的具有高孔隙率的Ag颗粒覆盖,使得ZnO纳米线具有更高的比表面积.纯ZnO纳米线和Ag修饰的ZnO纳米线都用作气敏基料,根据它们在酒精蒸气中紫光照射和无紫光照射条件下电阻的变化来测定它们的气敏特性.结果显示紫光照射下经质量分数为6%AgNO3修饰的ZnO纳米线对酒精蒸气的最大灵敏度由75.8提高到175.77.此过程中光催化氧化-还原反应起到了重要作用.
In order to improve the wine sensitivities of ZnO nanowires, Ag-modified ZnO nanowires were obtained by impregnation with violet light.The crystal structure of the modified ZnO nanowires was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) And morphological characterization.The results show that both the hexagonal wurtzite ZnO and the face-centered cubic Ag are present in the crystal structure.The surface of the three-dimensional network of ZnO nanowires is covered with a dense layer of Ag Particle coverage, making the ZnO nanowires have higher specific surface area.ZnO ZnO nanowires and Ag modified ZnO nanowires are used as gas-sensitive substrates, according to their alcohol vapor in purple and non-violet light irradiation resistance changes The results showed that the maximum sensitivity of ZnO nanowires modified by 6% AgNO3 to violet vapor was increased from 75.8 to 175.77 under UV irradiation.The photocatalytic oxidation-reduction reaction played an important role in this process .