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Supported cobalt oxide nanocrystals: morphology control and catalytic performance for styrene oxidation

机译：支持的钴氧化物纳米晶体：苯乙烯氧化的形态控制和催化性能

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摘要

Metal oxide nanoparticles with controlled size and morphology seem extremely important due to the strong correlation between these parameters and their catalytic properties. Herein supported cobalt oxide nanoparticles with controlled size and different morphologies were successfully synthesized via a facile hydrothermal synthetic route under mild conditions. The size and morphology of the products can be readily tuned by tuning process parameters such as hydrothermal time and hydrothermal temperature. As synthesized supported cobalt oxide nanoparticles, namely Co3O4-150, Co3O4-550 and Co3O4-650, were quite active in the catalytic oxidation of styrene with H2O2 as a green oxidant. However, due to the size and morphology differences, these supported cobalt oxide nanoparticles exhibited different activities and selectivities. Co3O4-550 resulted in higher activity while Co3O4-650 exhibited relatively higher selectivity to epoxide. Moreover, these cobalt catalysts could be recycled, indicating this to be a promising method of fabricating supported cobalt oxide catalysts for the oxidation of olefins in large-scale processes.
机译：具有受控尺寸和形态的金属氧化物纳米颗粒由于这些参数与其催化性能的强相关性而言似乎非常重要。在此，在温和条件下通过容易水热合成途径成功地合成了具有受控尺寸和不同形态的氧化钴纳米颗粒。通过调谐过程参数如水热时间和水热温度，可以容易地调整产品的大小和形态。作为合成的氧化钴纳米颗粒，即CO 3 O 4〜50，CO 3 O 4-550和CO 3 O 4 -650，在苯乙烯与H 2 O 2的催化氧化中非常活跃，作为绿色氧化剂。然而，由于尺寸和形貌差异，这些负载的氧化钴纳米粒子表现出不同的活性和选择性。 CO3O4-550导致较高的活性，而CO3O4-650对环氧化物的选择性相对较高。此外，这些钴催化剂可以再循环，表明这是制造支撑的钴氧化物催化剂的有希望的方法，用于在大规模过程中氧化烯烃。

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  • 来源
    《RSC Advances》 |2016年第92期|共7页
  • 作者

    Wang Zhen; Hou Xianliang; Shen Jingmei; Li Tiehu;

  • 作者单位

    Northwestern Polytech Univ Sch Mat Sci &

    Engn Xian 710072 Shaanxi Peoples R China;

    Northwestern Polytech Univ Sch Mat Sci &

    Engn Xian 710072 Shaanxi Peoples R China;

    Optimal CAE R&

    D 47802 West Anchor Court Plymouth MI 48170 USA;

    Northwestern Polytech Univ Sch Mat Sci &

    Engn Xian 710072 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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