Nano-Co3O4 supported on magnetic N-doped graphene as highly efficient catalyst for epoxidation of alkenes

被引：29
|
作者：
Li, Zhifang [1 ,2 ]
Wu, Shujie [1 ]
Yang, Changlong [2 ]
Ma, Yuanyuan [3 ]
Fu, Xiaoran [1 ]
Peng, Ling [1 ]
Guan, Jingqi [1 ]
Kan, Qiubin [1 ]
机构：
[1] Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
[2] Qiqihar Univ, Coll Mat Sci & Engn, Qiqihar 161006, Peoples R China
[3] Qiqihar Univ, Coll Heilongjiang Prov, Key Lab Fine Chem, Qiqihar 161006, Peoples R China
来源：
MOLECULAR CATALYSIS | 2017年 / 432卷
基金：
中国国家自然科学基金;
关键词：
Graphene; Fe3O4; Co3O4; Air; Styrene; LITHIUM ION BATTERIES; MOLECULAR-OXYGEN; SCHIFF-BASE; AEROBIC EPOXIDATION; MESOPOROUS CARBON; REVERSIBLE CAPACITY; FE3O4; NANOPARTICLES; CO3O4; RATE CAPABILITY; BENZYL ALCOHOL;
D O I：
10.1016/j.mcat.2017.02.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The epoxidation of alkenes to the corresponding epoxides plays a vital role in fine chemical engineering. Magnetic nanocomposite catalyst RGO/Fe3O4@C-N-Co3O4 (RGO: reduced graphene oxide) involving Co3O4 nanoparticles immobilized on magnetic N-doped graphene was prepared by a hydrothermal method. N-dopants in the RGO/Fe3O4@C-N-Co3O4 can strengthen the interaction between Co3O4 nanoparticles and the support. RGO/Fe3O4@C-N-Co3O4 revealed higher catalytic reactivity (i.e. 93.2% conversion of styrene and 88.4% selectivity to styrene oxide) as compared to bulk Co3O4, and Co3O4 supported on N-free RGO/Fe3O4@C due to site-isolation, good dispersion of Co3O4 nanoparticles and efficiently synergistic effect between Co3O4 and the magnetic support. In addition, the catalyst displayed good recoverability by simple magnetic separation with negligible loss in activity and selectivity within several successive runs due to superparamagnetism. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：267 / 273
页数：7
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