Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 8, Pages 4586-4594Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06967f
Keywords
-
Funding
- State Key 973 Program of PRC [2013CB934104]
- NSF of China [51372041, 51422202, 21271047]
- specialized research fund for the doctoral program of higher education of China [20120071110007]
- Shanghai Municipal Education Commission [13ZZ004]
- Shanghai Rising Star Project of STCSM [12QH1400300]
- Program for New Century Excellent Talents in University [NCET-12-0123]
- Shu Guang Project by Shanghai Municipal Education Commission [13SG02]
- Shanghai Education Development Foundation
Ask authors/readers for more resources
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 (similar to 23.5 emu g(-1)), perpendicularly aligned mesopore channels (similar to 2.2 nm in diameter), high surface area (similar to 405 m(2) 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available