鞭毛模板制备贵金属纳米颗粒/TiO2复合薄膜及光催化活性研究
Flagella-Templated Process to Noble Metal Nanoparticles/TiO2 Composite Films and Their Photocatalytic Activity

作者: 王莉霞 , 翁永根 , 何涛 , 徐金光 :烟台大学化学化工学院;

关键词: 微生物模板法TiO2薄膜Ag/TiO2Au/TiO2光催化Microbial Template Method TiO2 Film Ag/TiO2 Au/TiO2 Photocatalysis

摘要:
通过大肠杆菌鞭毛控制AuAg的纳米颗粒的生长及组装,获得稳定的鞭毛/金属纳米颗粒分散液。以此分散液以及透析钛溶胶为原料,通过浸渍提拉法制备TiO2/Au(Ag)/TiO2夹心结构的复合薄膜。通过透射电子显微镜(TEM)、紫外可见分光光度计(UV-visible spectroscopy)对鞭毛、鞭毛/贵金属纳米颗粒进行表征。研究发现,该复合膜的夹心结构起到了稳定金属纳米颗粒的作用,而金属纳米颗粒的引入赋予了该复合膜可见光催化活性。

Abstract:
In this work, flagella are used to control over the growth and assembly of Au and Ag nanoparticles, and a stable dispersion of flagella/metal nanoparticle is successfully obtained. A composite film with a TiO2/Au(Ag)/TiO2 sandwich structure is prepared by means of a dip-coating method where a dialyzed TiO2 solution and flagella stabilized Au and Ag nanoparticles are used as raw materials. TEM and UV-visible spectroscopy characterizations reveal that the sandwich structures play a role in stabilizing metal nanoparticles in the composite films and visible light photocatalytic activity is attributed to the existence of Au and Ag nanoparticles.

文章引用: 王莉霞 , 翁永根 , 何涛 , 徐金光 (2013) 鞭毛模板制备贵金属纳米颗粒/TiO2复合薄膜及光催化活性研究。 材料科学, 3, 121-124. doi: 10.12677/MS.2013.33023

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