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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >One-pot synthesis of stable Pd@mSiO(2) core-shell nanospheres with controlled pore structure and their application to the hydrogenation reaction
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One-pot synthesis of stable Pd@mSiO(2) core-shell nanospheres with controlled pore structure and their application to the hydrogenation reaction

机译：稳定Pd @ MSIO（2）核 - 壳纳米球的一锅合成，具有控制孔结构及其在氢化反应中的应用

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摘要

A new type of Pd@mSiO(2) composite nanospheres with controlled pore structure, consisting of internal Pd cores and controlled mesoporous silica shells, has been prepared by a facile one-pot method. The thickness and pore size of the shell could be easily tuned by changing the amounts of TEOS and the hydrophobic block length, respectively, during synthesis. In this perspective, the effects of CTAB concentration, pH, and TEOS concentration on the monodisperse sphere morphology of Pd@mSiO(2) nanoparticles (NPs) were investigated. In addition, a nucleation mechanism was proposed. Hydrogenation of nitrobenzene to aniline was used as a model reaction to discuss the effect of pore size on the transport rate of the reactants and the product selectivity in metal-catalyzed hydrogenation. The catalysts exhibited a high conversion rate and significantly enhanced stability, leading to a higher recyclability without loss of catalytic activity compared to conventional supported catalysts and commercial catalysts.
机译：具有受控孔结构的新型Pd @ MSIO（2）复合纳米球，由内部PD芯和控制的介孔二氧化硅壳组成，通过容易的单罐方法制备。通过在合成期间分别改变TEOS和疏水块长度的量，可以容易地调谐壳的厚度和孔径。在这种观点中，研究了CTAB浓度，pH和TEOS浓度对PD @ MSIO（2）纳米颗粒（NPS）的单分散球形态的影响。此外，提出了一种成核机理。将硝基苯的氢化用作模型反应，以探讨孔径对反应物的运输速率和金属催化氢化的产物选择性的影响。催化剂表现出高转化率和显着增强的稳定性，导致与常规负载的催化剂和商业催化剂相比，不损失催化活性的较高的再循环性。

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    Lv Mingxin; Yu Shitao; Liu Shiwei; Li Lu; Yu Hailong; Wu Qiong; Pang Jinhui; Liu Yuxiang; Xie Congxia; Liu Yue;

  • 作者单位

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Thchnol Coll Marine Sci &

    Biol Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Thchnol Coll Marine Sci &

    Biol Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn 53 Zhengzhou Rd Qingdao 266042 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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