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首页> 外文会议>13th International Zeolite Conference, 13th, Jul 8-13, 2001, Montpellier, France >Nb- and Ti- containing silica-based mesoporous molecular sieves as catalysts for photocatalytic oxidation of methane
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Nb- and Ti- containing silica-based mesoporous molecular sieves as catalysts for photocatalytic oxidation of methane

机译：含Nb和Ti的二氧化硅基介孔分子筛作为甲烷光催化氧化的催化剂

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摘要

Niobium- and titanium- containing MCM-41 silica-based mesoporous molecular sievesrnhave been synthesized using cetylpyridinium bromide as template under acidic andrnhydrothermal conditions, respectively. The catalysts obtained were characterized by thernmeans of XRD, DRUV-Vis, ICP-AES, and N_2 adsorption/desorption. Investigation into the unprecedented use of these water pre-adsorbed catalysts for photocatalytic oxidation of methane, it is found that methanol was formed at 323K and water pre-adsorbed samples exhibited higher catalytic activity than their pure metal oxides. Comparison with Nb-MCM-41, Ti-MCM-41 gave better methane conversion and methanol yield although traces of formaldehyde were observed over Nb-MCM-41 catalyst. Interestingly, OH? radical was detected by the in-situ ESR spectroscopy using DMPO as trapper.
机译：以溴化十六烷基吡啶为模板，分别在酸性和水热条件下合成了含铌和钛的MCM-41二氧化硅基介孔分子筛。通过XRD，DRUV-Vis，ICP-AES和N_2吸附/解吸对催化剂进行表征。在对这些水预吸附的催化剂进行甲烷光催化氧化的空前使用的研究中，发现甲醇在323K形成，并且水预吸附的样品显示出比其纯金属氧化物更高的催化活性。与Nb-MCM-41相比，Ti-MCM-41具有更好的甲烷转化率和甲醇产率，尽管在Nb-MCM-41催化剂上发现了微量的甲醛。有趣的是，OH？使用DMPO作为捕集剂，通过原位ESR光谱检测到自由基。

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  • 来源
  • 会议地点 Montpellier(FR);Montpellier(FR)
  • 作者

    Jing Xin; Xihui Chen; Jishuan Suo; Xiaoming Zhang; Liang Yan; Shuben Li;

  • 作者单位

    State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;

    College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004,China;

    State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China jssuo@ns.lzb.ac.cn;

    State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;

    State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;

    State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TQ649.45;
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