Gold Promoted S,N-Doped TiO2: An Efficient Catalyst for CO Adsorption and Oxidation

被引：73

作者：

Parida, K. M. ^{[1
]}

Sahu, Nruparaj ^{[1
]}

Tripathi, A. K. ^{[2
]}

Kamble, V. S. ^{[2
]}

机构：

[1] Inst Minerals & Mat Technol CSIR, Colloids & Mat Chem Dept, Bhubaneswar 751013, Orissa, India

[2] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2010年 / 44卷 / 11期

关键词：

PHOTOCATALYTIC ACTIVITY; TITANIUM-DIOXIDE; ANATASE; AU/TIO2; SURFACE; PHOTOLUMINESCENCE; NANOPARTICLES; GOLD/TITANIA; DEGRADATION; PARTICLES;

D O I：

10.1021/es903774j

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mesoporous S,N-TiO2 nanocomposite was prepared by a one-pot template free homogeneous coprecipitation technique using titanium oxysulfate sulfuric acid complex hydrate, thiourea, ethanol, and water. Nano gold deposition on mesoporous S,N-TiO2 was preformed by a borohydrate reduction method. To evaluate the structural and electronic properties, these catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HR-TEM), UV-vis DRS, photoluminescent (PL) spectra, Fourier transform infrared (FTIR), and TPO/TPD. CO adsorption and CO + O-2 interaction over these catalysts were investigated by in situ FTIR. Sulfur and nitrogen doping enhances the catalytic activity of Au/TiO2. Higher catalytic activity of Au/S,N-TiO2 compared to Au/TiO2 was attributed to the presence of oxygen vacancy and creation of new adsorption sites at Au/TiO2 interfaces for the adsorption and activation of O-2 molecules.

引用

页码：4155 / 4160

页数：6

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