期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 20, 期 14, 页码 2831-2839出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b919536j
关键词
-
资金
- Chinese Academy of Sciences
We report on the single-pot fabrication of ordered mesoporous crystallized titania films doped with gold. Au is incorporated in TiO2 films by adding to the coating solution precursors such as AuCl3 or monodisperse Au-11(3+) nanoclusters, and Au nanoparticles are formed by calcination. A systematic study is performed to correlate structure, Au doping and photocatalytic activity of such films. Two-dimensional small angle X-ray scattering (2D-SAXS), transmission electronic microscopy (TEM), scanning electronic microscopy (SEM) and porosimetry-ellipsometry show that the films retain their mesoporous order even for doping levels as high as 1% Au : Ti atomic ratio. Wide angle X-ray scattering (WAXS), and cyclovoltammetry (CV) show that Au-11(3+) nanoclusters promote the formation of the TiO2 ( B) phase in competition with the anatase phase. AuCl3 stabilizes instead only the anatase phase. The highest photocatalytic activity is exhibited by films where Au-11(3+) is employed as a precursor, which we attribute to the combination of the mixed anatase/TiO2 ( B) phase, of Au nanoparticle doping and of a well-ordered mesoporous TiO2 matrix.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据