Jump to main content
Jump to site search

Issue 8, 2015
Previous Article Next Article

Magnetic yolk–shell mesoporous silica microspheres with supported Au nanoparticles as recyclable high-performance nanocatalysts

Author affiliations

Abstract

Based on the surface engineering strategy, multifunctional yolk–shell microspheres with a magnetic core encapsulated in hollow mesoporous silica have been rationally synthesized through a stepwise solution-phase interface deposition approach by combining the sol–gel chemistry and surfactant-involved co-assembly process. The resulting microspheres possess a well-defined yolk–shell structure, uniform sizes, high magnetization (∼23.5 emu g−1), perpendicularly aligned mesopore channels (∼2.2 nm in diameter), high surface area (∼405 m2 g−1) and controllable void space size (320–430 nm in diameter). Gold nanoparticles of 4.2 nm are incorporated into the yolk–shell microspheres, leading to a novel magnetically recyclable nanocatalyst. The obtained catalyst exhibits an excellent catalytic performance for styrene epoxidation with high conversion (91.4%) and selectivity (83.1%) in 12 h, much better than its counterpart, Au-loaded magnetic mesoporous silica catalyst. The multifunctional yolk–shell microspheres possess superior stability in terms of catalysis performance and porous yolk–shell structure even after 12 cycles of catalysis.

Graphical abstract: Magnetic yolk–shell mesoporous silica microspheres with supported Au nanoparticles as recyclable high-performance nanocatalysts

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Dec 2014, accepted on 06 Jan 2015 and first published on 06 Jan 2015


Article type: Paper
DOI: 10.1039/C4TA06967F
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 4586-4594
  •   Request permissions

    Magnetic yolk–shell mesoporous silica microspheres with supported Au nanoparticles as recyclable high-performance nanocatalysts

    Q. Yue, Y. Zhang, C. Wang, X. Wang, Z. Sun, X. Hou, D. Zhao and Y. Deng, J. Mater. Chem. A, 2015, 3, 4586
    DOI: 10.1039/C4TA06967F

Search articles by author

Spotlight

Advertisements