Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (5): 1589.doi: 10.7503/cjcu20200303

• Article • Previous Articles     Next Articles

In situ Confinement Growth Strategy for Ordered Mesoporous Carbon Support Ultrasmall MoO3 Nanoparticles

WANG Changyao, WANG Shuai, DUAN Linlin, ZHU Xiaohang, ZHANG Xingmiao, LI Wei()   

  1. Department of Chemistry,Fudan University,Shanghai 200433,China
  • Received:2020-05-28 Online:2021-05-10 Published:2020-09-24
  • Contact: LI Wei E-mail:weilichem@fudan.edu.cn
  • Supported by:
    This paper is supported by the National Natural Science Foundation of China(21975050);the Natio?nal Key Research and Development Program of China(2016YFA0204000);China Postdoctoral Science Foundation(2019M651342)

Abstract:

Ultrasmall particle sizes and excellent dispersity of the MoO3 active species on support majorly dominate their catalytic performances. Herein, a series of ordered mesoporous carbon support ultrasmall molybdena nanoparticles(OMC-US-MoO3) composites was synthesized through an in situ confinement growth strategy. Ordered mesoporous carbon was used as the matrix to in situ confine the growth of MoO3 nanocrystals. The obtained MoO3 nanocrystals show ultrasmall particle sizes(<5 nm) and excellent dispersity on the meso- porous carbon frameworks. The obtained OMC-US-MoO3 exhibits tunable specific surface areas(428―796 m2/g), pore volumes(0.27―0.62 cm3/g), MoO3 contents(4%―27%, mass fraction) and uniform pore sizes(4.6―5.7 nm). As a typical example, the obtained sample with 7% MoO3(denoted as OMC-US-MoO3-7) shows the largest pore size, smallest thickness of pore wall and most regular mesostructures. When being used as a catalyst, the OMC-US-MoO3-7 exhibits an excellent catalytic activity for selective oxidation of cyclooctene with a high stability.

Key words: Ordered mesoporous carbon, MoO3 nanocrystal, Nanomaterials, Confinement growth

CLC Number: 

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