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学科主题: 物理化学
题名: Designed synthesis of sulfonated polystyrene/mesoporous silica hollow nanospheres as efficient solid acid catalysts
作者: Zhang, Xiaomin1, 2;  Zhang, Lei1;  Yang, Qihua1
通讯作者: 杨启华
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2014
DOI: 10.1039/c4ta00241e
卷: 2, 期:20, 页:7546-7554
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: We report the successful synthesis of hybrid hollow nanospheres (HNs) with sulfonated polystyrene (PS-SO3H) aligned uniformly in the mesoporous channel of a silica shell. The fabrication process involved the sulfonation of silica HNs with polystyrene highly dispersed in the mesoporous shell which was prepared by co-condensation of a mixture of tetraethoxysilane (TEOS) and alkoxysilyl-functionalized poly(methyl acrylate) (PMA) around PS nanospheres in a base medium using cetyltrimethylammonium bromide (CTAB) as structural directing agent followed by THF treatment. The surface properties of the hybrid HNs were adjusted by the amount of PMA incorporated in the silica shell during the synthesis process and also by modification with an octyl group through a grafting method. The hybrid HNs, with acid exchange capacity in the range 0.8 to 2.0 mmol g(-1), could efficiently catalyze the esterification reaction of lauric acid with ethanol. All hybrid HNs show much higher activity than commercial Amberlyst(R)-15 catalyst and the TOF of the optimized hybrid HNs is almost identical to that of concentrated sulfuric acid. The high activity of the hybrid HNs is mainly attributed to the uniform distribution of the PS-SO3H group in the mesoporous silica shell, the penetrating mesopore, and surface hydrophobicity. It was found that the recycle stability of hybrid HNs could be enhanced greatly by octyl group modification, which may prevent the leaching of PS-SO3H during the catalytic process.
关键词[WOS]: ORDERED MESOPOROUS SILICA ;  ION-EXCHANGE RESINS ;  WATER-TOLERANT ;  SPHERES ;  HYDROPHOBICITY ;  SHELL ;  SIZE ;  NANOCOMPOSITES ;  FABRICATION ;  ADSORPTION
语种: 英语
WOS记录号: WOS:000334998400054
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144212
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Xiaomin,Zhang, Lei,Yang, Qihua. Designed synthesis of sulfonated polystyrene/mesoporous silica hollow nanospheres as efficient solid acid catalysts[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(20):7546-7554.
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