| 双金属核壳结构负载型Au@Ag/TiO2催化剂的制备及表征 |
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| 引用本文： | 孙彦红,张 敏,杨建军.双金属核壳结构负载型Au@Ag/TiO2催化剂的制备及表征[J].无机化学学报,2009,25(11):1965-1970. |
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| 作者姓名： | 孙彦红 张 敏 杨建军 |
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| 作者单位： | 河南大学特种功能材料重点实验室,开封,475004 |
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| 基金项目： | 河南省高校新世纪优秀人才支持计划 |
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| 摘 要： | 利用溶胶法制备了Au核Ag壳(Au@Ag)结构复合纳米粒子，用粉末-溶胶法和水热合成法使其负载于TiO2纳米粒子上，利用紫外-可见吸收光谱﹑X射线粉末衍射﹑透射电子显微镜对复合结构材料进行了结构表征，并对其光催化消除臭氧的性能进行了研究。结果表明，制备方法、Au/Ag化学计量比及金属负载量等对光催化消除臭氧的活性均有很大影响。采用粉末-溶胶法制备的1%-Au@Ag/TiO2(nAu/nAg=1∶3)催化剂，由于TiO2表面沉积的Au@Ag金属颗粒尺寸小且分散度高，而且1%的金属担载量有利于光生电子空穴的有效分离，光催化消除臭氧的活性最高。
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| 关 键 词： | 核壳结构 复合纳米粒子 负载型催化剂 光催化 臭氧消除 |
Preparation and Characterization of Bimetal Core-Shell Structure Supported Au@Ag/TiO2 Catalyst |
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| SUN Yan-Hong,ZHANG Min and YANG Jian-Jun.Preparation and Characterization of Bimetal Core-Shell Structure Supported Au@Ag/TiO2 Catalyst[J].Chinese Journal of Inorganic Chemistry,2009,25(11):1965-1970. |
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| Authors: | SUN Yan-Hong ZHANG Min and YANG Jian-Jun |
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| Institution: | The Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004,The Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004 and The Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004 |
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| Abstract: | Core-shell Au@Ag nanoparticles were prepared by the sol method and deposited on TiO_2 nanoparticles by the powder-sol method and the hydrothennal method. The structure of sol and Au@Ag/TiO_2 was characterized by UV-Vis, XRD, and TEM techniques. The activity of phtocatalytic elimination of ozone was investigated on Au@Ag/TiO_2surface. The results show that preparation method, Au/Ag stoichiometric proportion and the metal loading have great effect on the activity of photocatalytic elimination of ozone, 1% Au@Ag/TiO_2(n_Au/n_Ag=1:3) photocatalyst prepared by powder-sol method has the best activity for photocatalytic elimination of ozone due to the small particle size of Au@Ag, higher dispersion of metal and the effective separation of the photo-generated electron and hole. |
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| Keywords: | core-shell structure composite nanoparticles supported catalyst photocatalysis elimination of ozone |
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