| Au纳米粒子对ZnO分级结构的气敏特性影响 |
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| 引用本文： | 刘艳丽,李桂芝.Au纳米粒子对ZnO分级结构的气敏特性影响[J].湖南农业大学学报(自然科学版),2013,40(6):69-73. |
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| 作者姓名： | 刘艳丽 李桂芝 |
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| 作者单位： | (1.湖南大学 材料科学与工程学院，湖南 长沙410082；2.湖南大学 化学化工学院，湖南 长沙410082） |
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| 摘 要： | 采用化学浴法制备了花形ZnO纳米棒簇，将平均粒径约40 nm的Au纳米粒子引入ZnO表面得到不同Au修饰量的Au/ZnO复合结构.Uv-vis吸收光谱表明，在Au和ZnO之间存在着作用力使Au的吸收光谱产生红移，这种作用力的存在使复合结构的气敏性能得到了较显著的改善.当Au修饰的质量分数为6%时，复合材料的气敏性能最高，对丙酮气体的灵敏度较纯ZnO提高了约17倍.
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| 关 键 词： | 花形ZnO棒簇 Au纳米粒子 表面修饰 气体传感器 |
Impact of Au Nanoparticles on the Sensing Performance of Flower-like ZnO |
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| Institution: | (1.College of Material Science and Engineering, Hunan Univ, Changsha,Hunan410082, China;2.College of Chemistry and Chemical Industry, Hunan Univ, Changsha,Hunan410082, China) |
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| Abstract: | Flower-like ZnO was synthesized in a simple chemical bath method. This ZnO structure modified by a controllable density of Au nanoparticles with an average diameter of 40 nm was achieved with hydrothermal process. The Uv-vis adsorption spectra of Au nanoparticles shifted a little, indicating the interaction between ZnO and Au nanoparticles, which led to excellent gas sensing performance. ZnO modified by Au nanoparticles with weight percent of 6 % showed that the optimum gas response to acetone and the gas response was nearly 17 times higher than that of pure ZnO. |
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