期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 41, 页码 12804-12810出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta13185h
关键词
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资金
- National Basic Research Program of China [2009CB930400]
- National Natural Science Foundation of China [NSFC 21273244, 21121063]
- Chinese Academy of Sciences [KJCX2-YW-N41]
An efficient and facile method was designed to produce an acid-base bifunctional mesoporous silica nanoreactor (MS-SO3H@MS@MS-NH2) with acid sites on the inner core, unfunctionalized silica as the neutral zone shell and basic sites on the outer shell. Such acid core-neutral zone-base shell structure design resulted in excellent spatial separation of the hostile functionalities and was better than that of the core-shell structure. The spatial order of acid sites and basic sites in the mesoporous silica nanosphere offered a designated diffusion pathway that was favorable for reaction species, while the mesoporous structure endowed the material with the confinement effect. As a result, the core-shell-shell structured mesoporous silica nanosphere was an excellent bifunctional catalyst for one-pot cascade reaction sequences.
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