期刊
CHINESE JOURNAL OF CATALYSIS
卷 42, 期 10, 页码 1821-1830出版社
ELSEVIER
DOI: 10.1016/S1872-2067(21)63812-3
关键词
Covalent organic polymers; Mesoporous silica; Hybrid materials; Synergy effect; Photocatalysis; Reductive dehylogenation reaction
资金
- National Key R&D Program of China [2017YFB0702800]
- National Natural Science Foundation of China [21733009, 22002162]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020200]
In this study, mesoporous hybrid nanospheres were synthesized by one-pot method, with nanoCOPs uniformly distributed in the silica network, inheriting visible light responsive properties and enhancing photocatalyst activity successfully.
Organic-inorganic hybrid materials provide a desirable platform for the development of novel functional materials. Here, we report the one-pot synthesis of mesoporous hybrid nanospheres by the in-situ sol-gel condensation of tetraethoxysilane around surfactant micelle-confined nano covalent organic polymer (nanoCOP) colloids. The hybrid nanospheres containing nanoCOPs uniformly distributed in the mesosilica network, inherited the visible light responsive properties of the nanoCOPs. The turnover frequency of the hybrid nanospheres is almost 12 times that of its corresponding bulk COP counterpart for the photocatalytic reductive dehalogenation of alpha-bromoacetophenone, which is attributed to activation of the Hantzsch ester reductant by the hydroxyl group. The existence of a volcano relationship between the activity and nanoCOP/mesosilica ratio confirmed the synergistic effect between nanoCOP and mesosilica. Our preliminary results suggest that hybridization of semiconductors and reactant-activating materials is an efficient strategy for enhancing the activity of a catalyst for photocatalysis. (C) 2021, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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