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首页> 外文期刊>New Journal of Chemistry >Synthesis and visible photocatalytic activities of a Au@Ag@ZnO triple layer core-shell nanostructure
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Synthesis and visible photocatalytic activities of a Au@Ag@ZnO triple layer core-shell nanostructure

机译:Au @ Ag @ ZnO三层核壳纳米结构的合成及可见光催化活性

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We report a facile route for the synthesis of a Au@Ag@ZnO triple layer core-shell nanostructure with Au as core, Ag as intermediate layer and ZnO as an outer shell. The thickness and surface plasmon resonance (SPR) absorption peak of the Ag shell of Au@Ag bimetal has been controlled by the concentration of AgNO3. In the Au@Ag@ZnO nanostructure two major absorption peaks were seen, one due to SPR of Au and other due to the combined effect of Ag and a ZnO layer. The photoluminescence study shows that the Au@Ag@ZnO has better charge separation compared to the ZnO and Au@ZnO nanostructure. The visible photocatalytic activity for the degradation of methyl orange dye was found to be much higher in the case of the Au@Ag@ZnO core-shell structure than ZnO or Au@ZnO or TiO2.
机译:我们报告了一个以Au为核,Ag为中间层和ZnO为外壳的Au @ Ag @ ZnO三层核-壳纳米结构合成的简便方法。 Au @ Ag双金属的Ag壳的厚度和表面等离子体共振(SPR)吸收峰已由AgNO3的浓度控制。在Au @ Ag @ ZnO纳米结构中,看到两个主要的吸收峰,一个是由于Au的SPR,另一个是由于Ag和ZnO层的组合作用。光致发光研究表明,与ZnO和Au @ ZnO纳米结构相比,Au @ Ag @ ZnO具有更好的电荷分离。发现在Au @ Ag @ ZnO核-壳结构的情况下,可见光催化降解甲基橙染料的活性比ZnO或Au @ ZnO或TiO2高得多。

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