Jump to main content
Jump to site search

Issue 5, 2014
Previous Article Next Article

Core–shell structured Fe3O4@SiO2 supported cobalt(II) or copper(II) acetylacetonate complexes: magnetically recoverable nanocatalysts for aerobic epoxidation of styrene

Author affiliations

Abstract

Organic–inorganic hybrid heterogeneous nanocatalysts were successfully fabricated via covalent anchoring of cobalt(II) or copper(II) acetylacetonate complexes ([Co(acac)2] or [Cu(acac)2]) onto core–shell structured Fe3O4@SiO2 previously functionalized with 3-aminopropyltriethoxysilane (APTES). Surface functionalized nanomaterials were analyzed by a series of characterization techniques such as SEM, TEM, XRD, FT-IR, XPS, ICP-AES and VSM. The catalytic performance of the prepared nanocatalysts was evaluated in the epoxidation of styrene using eco-friendly air as the oxygen source. Both of the nanocomposites Fe3O4@SiO2–NH2–Co and Fe3O4@SiO2–NH2–Cu presented excellent styrene conversion (90.8% vs. 86.7%) and good epoxide selectivity (63.7% vs. 51.4%), much higher than the corresponding homogeneous counterparts. In addition, the magnetically recoverable nanocatalysts (MRNCs) can be conveniently separated and recovered from the reaction system by applying an external magnetic field and reused for four cycles with insignificant loss of catalytic activity. These results demonstrate that the heterogeneous nanocatalysts possess potential applications for green and sustainable development.

Graphical abstract: Core–shell structured Fe3O4@SiO2 supported cobalt(ii) or copper(ii) acetylacetonate complexes: magnetically recoverable nanocatalysts for aerobic epoxidation of styrene

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jan 2014, accepted on 31 Jan 2014 and first published on 04 Mar 2014


Article type: Paper
DOI: 10.1039/C4CY00017J
Citation: Catal. Sci. Technol., 2014,4, 1246-1252
  •   Request permissions

    Core–shell structured Fe3O4@SiO2 supported cobalt(II) or copper(II) acetylacetonate complexes: magnetically recoverable nanocatalysts for aerobic epoxidation of styrene

    J. Sun, G. Yu, L. Liu, Z. Li, Q. Kan, Q. Huo and J. Guan, Catal. Sci. Technol., 2014, 4, 1246
    DOI: 10.1039/C4CY00017J

Search articles by author

Spotlight

Advertisements