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首页> 外文期刊>Environmental Science & Technology >Gold Promoted S,N-Doped TiO_2: An Efficient Catalyst for CO Adsorption and Oxidation
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Gold Promoted S,N-Doped TiO_2: An Efficient Catalyst for CO Adsorption and Oxidation

机译:金促进的S,N掺杂的TiO_2:一种用于CO吸附和氧化的高效催化剂

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摘要

Mesoporous S,N-TiO_2 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-TiO_2 was preformed by a borohydrate reduction method. To evaluate the structural and electronic properties, these catalysts were characterized by X-ray diffraction (XAD), 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/TiO_2 Higher catalytic activity of Au/S,N-TiO_2 compared to Au/TiO_2 was attributed to the presence of oxygen vacancy and creation of new adsorption sites at Au/TiO_2 interfaces for the adsorption and activation of O_2 molecules.
机译:介孔的S,N-TiO_2纳米复合材料是通过一锅无模板的均相共沉淀技术制备的,使用的是硫酸氧钛硫酸盐硫酸盐水合物,硫脲,乙醇和水。通过硼水合物还原法在中孔S,N-TiO_2上形成纳米金。为了评估结构和电子性能,这些催化剂通过X射线衍射(XAD),X射线光电子能谱(XPS),高分辨率透射电子显微镜(HR-TEM),UV-vis DRS,光致发光(PL)进行了表征。光谱,红外傅立叶变换(FTIR)和TPO / TPD。通过原位FTIR研究了这些催化剂上CO的吸附和CO + O_2的相互作用。硫和氮掺杂增强了Au / TiO_2的催化活性与Au / TiO_2相比,Au / S,N-TiO_2的更高催化活性归因于氧空位的存在以及在Au / TiO_2界面上产生新的吸附位以进行吸附和O_2分子的活化

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  • 来源
    《Environmental Science & Technology》 |2010年第11期|P.4155-4160|共6页
  • 作者单位

    Colloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Orissa, India;

    rnColloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Orissa, India;

    rnChemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400065, India;

    rnChemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400065, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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