催化学报 ›› 2016, Vol. 37 ›› Issue (1): 153-158.DOI: 10.1016/S1872-2067(15)61001-4

• 论文 • 上一篇    下一篇

中孔MCM-41负载Ru纳米粒子催化剂用于超声辐射下芳烃选择氧化反应

Alireza Khorshidi   

  1. 桂兰大学理学院化学系, 桂兰, 雷什特, 伊朗
  • 收稿日期:2015-10-09 修回日期:2015-10-24 出版日期:2015-12-26 发布日期:2015-12-26
  • 通讯作者: Alireza Khorshidi
  • 作者简介:Alireza Khorshidi
  • 基金资助:

    This work was supported by the Research Council of University of Guilan.

Ruthenium nanoparticles supported on mesoporous MCM-41 as an efficient and reusable catalyst for selective oxidation of arenes under ultrasound irradiation

Alireza Khorshidi   

  1. Department of Chemisty, Faculty of Sciences, University of Guilan, P. O. Box 41335-1914, Guilan, Rasht, Iran
  • Received:2015-10-09 Revised:2015-10-24 Online:2015-12-26 Published:2015-12-26
  • Contact: Alireza Khorshidi
  • Supported by:

    This work was supported by the Research Council of University of Guilan.

摘要:

以中孔MCM-41为载体制得均一分散的粒径约5nm的Ru纳米粒子催化剂MCM-41-Ru,采用电感耦合等离子体、透射电镜、能量散射谱、X射线衍射和N2吸附-脱附法对其进行了表征,并将其作为可重复使用高效催化剂用于超声辅助芳烃选择氧化反应.结果表明,在超声辐射和KBrO3为氧化剂条件下,MCM-41-Ru催化剂加速了氧化反应,并以较高产率得到目的产物.回收的催化剂用于下次反应时活性保持不变,但其活性中心性质发生变化.

关键词: 纳米粒子, 超声, 钌, 芳烃氧化, MCM-41

Abstract:

Mesoporous MCM-41 was used as a support for the uniform dispersion of ruthenium nanoparticles having an average particle size of ~5 nm. The obtained nanocomposite, MCM-41-Ru, was characterized using inductively coupled plasma, transmission electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, and BET surface area measurements. The material was employed as an efficient and recyclable catalyst in the ultrasound-assisted oxidation of arenes. It was observed that ultrasound irradiation in combination with KBrO3 as the oxidant, in the presence of MCM-41-Ru nanoparticles, accelerates the oxidation reaction to afford the desired products in good yields. The recovered catalyst retained activity for successive runs, with a continuous change in the nature of its active sites.

Key words: Nanoparticle, Ultrasound, Ruthenium, Arene oxidation, MCM-41