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学科主题: 物理化学
题名: Superhydrophobic SiO2-based nanocomposite modified with organic groups as catalyst for selective oxidation of ethylbenzene
作者: Chen, Chen1;  Shi, Song1;  Wang, Min1;  Ma, Hong1;  Zhou, Lipeng2;  Xu, Jie1
通讯作者: 徐杰
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2014
DOI: 10.1039/c4ta00943f
卷: 2, 期:21, 页:8126-8134
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: A surface organic modification strategy is utilized to design and prepare a series of superhydrophobic SiO2-based nanocomposites with cobalt ions in the bulk phase and different organic groups on the surface. Physical properties such as BET surface area, surface hydrophilicity/hydrophobicity, and water adsorption amount changed significantly with the introduction of organic groups of various chain lengths, which was confirmed by TEM, SEM, FTIR, Si-29-NMR, N-2 adsorption-desorption, sessile water contact angle, and TG-DTA measurements. Surface hydrophilicity/hydrophobicity altered from hydrophilic to superhydrophobic with an increase in carbon chain length, which showed an obvious effect on the catalytic performance in selective oxidation of hydrocarbons such as ethylbenzene. Superhydrophobicity was guaranteed for high catalytic activity, and the carbon chain length of the organic group was also an important factor. Superhydrophobic Pr-Co-SiO2 that contained the propyl group was the most efficient catalyst, and the conversion of ethylbenzene reached 70.4% with O-2 as an oxidant under solvent-free conditions at 393 K for 7 h, which is nearly nine times that of the hydrophilic Co-SiO2 without surface organic modification.
关键词[WOS]: MOLECULAR-SIEVE CATALYSTS ;  HYDROCARBON OXIDATION ;  AEROBIC OXIDATION ;  CARBON NANOTUBES ;  SILICA ;  OXYGEN ;  CYCLOHEXANE ;  SURFACE ;  NANOPARTICLES ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000335924100066
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144422
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, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Zhengzhou Univ, Dept Chem, Inst Catalysis, Zhengzhou 450001, Peoples R China

Recommended Citation:
Chen, Chen,Shi, Song,Wang, Min,et al. Superhydrophobic SiO2-based nanocomposite modified with organic groups as catalyst for selective oxidation of ethylbenzene[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(21):8126-8134.
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