| 紫光激发提高Ag修饰的ZnO纳米线的气敏特性 |
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| 引用本文： | 于灵敏,朱长纯. 紫光激发提高Ag修饰的ZnO纳米线的气敏特性[J]. 纳米技术与精密工程, 2009, 7(4): 295-299 |
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| 作者姓名： | 于灵敏 朱长纯 |
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| 作者单位： | 1. 西安工业大学材料与化工学院,西安,710032;西安交通大学电子与信息工程学院,西安,710049
2. 西安交通大学电子与信息工程学院,西安,710049 |
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| 基金项目： | 国家高技术研究发展计划(863)项目，陕西省科技厅工业攻关项目 |
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| 摘 要： | 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.
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| 关 键 词： | ZnO纳米线 气敏传感器 Ag修饰 紫光激发 |
Violet Irradiation Enhancing Gas-Sensing Properties of Ag-Modified ZnO Nanowires |
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| YU Ling-min,ZHU Chang-chun. Violet Irradiation Enhancing Gas-Sensing Properties of Ag-Modified ZnO Nanowires[J]. Nanotechnology and Precision Engineering, 2009, 7(4): 295-299 |
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| Authors: | YU Ling-min ZHU Chang-chun |
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| Affiliation: | 1.School of Materials and Chemical Engineering;Xi'an Technological University;Xi'an 710032;China;2.School of Electronics and Information Engineering;Xi'an Jiaotong University;Xi'an 710049;China |
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| Abstract: | To improve the gas sensitivities of ZnO nanowires to alcohol,the Ag-modified ZnO nanowires via immersion method were obtained by violet irradiation.The crystal structure and morphology of Zn0 nanowires were characterized by scanning electron microscope(SEM)and X-ray diffraction(XRD),respectively.The results show that the obtained Ag-modified ZnO nanowires are composed of hexagonal wurtzite ZnO structure and face-centered cubic Ag structure.The three-dimensional network of ZnO nanowires,modified by condensed... |
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| Keywords: | ZnO nanowires gas sensor Ag-modified violet irradiation |
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