Multifunctional Mesoporous Composite Microspheres with Well-Designed Nanostructure: A Highly Integrated Catalyst System
Yonghui Deng
Yue Cai
Zhenkun Sun
Jia Liu
Chong Liu
Jing Wei
Wei Li
Chang Liu
Yao Wang
Dongyuan Zhao
10.1021/ja1025744.s001
https://acs.figshare.com/articles/journal_contribution/Multifunctional_Mesoporous_Composite_Microspheres_with_Well_Designed_Nanostructure_A_Highly_Integrated_Catalyst_System/2758417
The precise control of the size, morphology, surface chemistry, and assembly process of each component is important to construction of integrated functional nanocomposites. We report here the fabrication of multifunctional microspheres which possess a core of nonporous silica-protected magnetite particles, transition layer of active gold nanoparticles, and an outer shell of ordered mesoporous silica with perpendicularly aligned pore channels. The well-designed microspheres have high magnetization (18.6 emu/g), large surface area (236 m<sup>2</sup>/g), highly open mesopores (∼2.2 nm), and stably confined but accessible Au nanoparticles and, as a result, show high performance in catalytic reduction of 4-nitrophenol (with conversion of 95% in 12 min), styrene epoxidation with high conversion (72%) and selectivity (80%), especial convenient magnetic separability, long life and good reusability. The unique nanostructure makes the microsphere to be a novel stable and approachable catalyst system for various catalytic industry processes.
2010-06-23 00:00:00
assembly process
surface chemistry
pore channels
Integrated Catalyst SystemThe
multifunctional microspheres
mesoporous silica
transition layer
industry processes
catalyst system
gold nanoparticles
conversion
Multifunctional Mesoporous Composite Microspheres