ENHANCED PHOTOCATALYTIC ACTIVITY OF NITROGEN-DOPED TITANIA BY DEPOSITED WITH GOLD
ENHANCED PHOTOCATALYTIC ACTIVITY OF NITROGEN-DOPED TITANIA BY DEPOSITED WITH GOLD
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DOI：
10.1021/jp904465d
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发表时间：
2009-07
影响因子：
3.7
通讯作者：
Yongmei Wu;Haibei Liu;Jinlong Zhang;Feng Chen
中科院分区：
文献类型：
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作者：
Yongmei Wu;Haibei Liu;Jinlong Zhang;Feng Chen
通过硫酸钛和氨水的水解，然后采用Au沉积-沉淀法成功制备了沉积有Au的N掺杂TiO 2（Au/N− TiO 2）。通过X射线衍射（XRD）、原子吸收火焰发射光谱（AAS）、紫外-维斯吸收光谱、X射线光电子能谱（XPS）、N2物理吸附、高分辨率透射电子显微镜（HRTEM）和光致发光（PL）光谱对所得样品进行了表征。在可见光和紫外光照射下，考察了样品对橙子（MO）的光催化降解活性。结果表明，Au/N− TiO 2样品在紫外光和可见光照射下的光催化活性均高于N掺杂TiO 2样品。紫外-可见漫反射光谱表明，Au/N-TiO 2的光吸收扩展到可见光区，样品的PL分析表明，Au颗粒沉积后，电子-空穴复合得到有效抑制。
N-doped TiO2 deposited with Au (Au/N−TiO2) was successfully prepared via hydrolysis of titanium sulfate and ammonia followed with a Au deposition−precipitation method. The resulting samples were characterized by X-ray diffraction (XRD), atomic absorption flame emission spectroscopy (AAS), UV−vis absorbance spectroscopy, X-ray photoelectron spectroscopy (XPS), N2 physical adsorption, high-resolution transmission electron microscopy (HRTEM), and photoluminescence (PL) spectra. The photocatalytic activities of the samples were evaluated for degradation of methyl orange (MO) under visible light and UV light irradiation. It was found that the Au/N−TiO2 samples presented much higher photocatalytic activity than N-doped TiO2 under both UV and visible light irradiation. Diffuse reflectance UV−vis spectra showed an extension of light absorption into the visible region for Au/N−TiO2, and PL analysis of the sample indicated that the electron−hole recombination has been effectively inhibited after Au particles deposi...