催化学报 ›› 2015, Vol. 36 ›› Issue (7): 1117-1123.DOI: 10.1016/S1872-2067(14)60310-7

• 论文 • 上一篇    下一篇

自下而上法制备金-介孔二氧化硅复合纳米管用作还原4-硝基苯酚的催化剂

彭永胜a,b, 冷文光b, 董彬b, 格日乐b, 段洪东a, 高艳安b   

  1. a 齐鲁工业大学化学与制药工程学院, 山东济南250353;
    b 中国科学院大连化学物理研究所, 辽宁大连116023
  • 收稿日期:2015-01-07 修回日期:2015-02-07 出版日期:2015-06-12 发布日期:2015-07-30
  • 通讯作者: 段洪东, 电话: (0531)89631215; 电子信箱: hdduan67@gmail.com;高艳安 电话: (0411)84379992; 传真: (0411)84379992; 电子信箱: ygao@dicp.ac.cn
  • 基金资助:

    国家自然科学基金(21273235, 21303076, 21403214); 中国科学院百人计划.

Bottom-up preparation of gold nanoparticle-mesoporous silica composite nanotubes as a catalyst for the reduction of 4-nitrophenol

Yongsheng Penga,b, Wenguang Lengb, Bin Dongb, Rile Geb, Hongdong Duana, Yan’an Gaob   

  1. a School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, China;
    b Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2015-01-07 Revised:2015-02-07 Online:2015-06-12 Published:2015-07-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21273235, 21303076, and 21403214) and the 100 Talents Program of the Chinese Academy of Sciences.

摘要:

采用自下而上方法制备了金-介孔二氧化硅复合纳米管, 其中金纳米粒子作为催化剂嵌在介孔二氧化硅纳米管管壁内侧. 金纳米颗粒的团聚、脱落和晶粒尺寸生长都可以被有效限制, 而且催化剂负载量和尺寸大小均可实现简单控制. 管壁中的介孔孔道、纳米管末端开口以及一维中空管道可以协同促进反应物扩散, 从而提高4-硝基苯酚还原反应活性. 循环实验证明这种复合纳米管催化剂具有良好的可重复使用性, 而且在反应过程中未出现金纳米粒子脱落或团聚现象.

关键词: 金, 介孔二氧化硅, 纳米管, 自下而上方法, 催化剂, 4-硝基苯酚还原

Abstract:

Gold (Au) nanoparticle (NP)-mesoporous silica (SiO2) composite nanotubes were prepared by a bottom-up approach, in which Au NPs were anchored to the inner wall of mesoporous SiO2 tubular shells. In this composite, the agglomeration, exfoliation, and grain growth of Au NPs were restricted, and the loading and size of the catalyst NPs were easily tuned. The mesoporous shell, open ends, and one-dimensional passage of the SiO2 nanotubes all promote the diffusion of reactants, which enhanced the catalytic efficiency of this composite in the reduction of 4-nitrophenol. The Au NP-mesoporous SiO2 composite nanotubes also demonstrated good reusability, and no leaching or agglomeration of the Au NPs was observed during the catalytic reaction.

Key words: Gold, Mesoporous silica, Nanotube, Bottom-up approach, Catalyst, 4-Nitrophenol reduction