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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.7b03633
|2 doi
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|a pubmed24n0930.xml
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|a (DE-627)NLM279136137
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|a (NLM)29249161
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Lv, Guojun
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Surface-Active Hollow Titanosilicate Particles as a Pickering Interfacial Catalyst for Liquid-Phase Alkene Epoxidation Reactions
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.04.2018
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|a Date Revised 11.04.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The design of catalyst particles bearing excellent catalytic activity and suitable surface wettability is the key to successful application of Pickering interfacial catalysis. In this study, the epoxidation of 1-hexene and cyclohexene with aqueous hydrogen peroxide over hollow TS-1 (HTS-1) zeolite was studied as a probe reaction to investigate the influence of catalyst surface wettability on catalytic activity. Hydrophobized HTS-1 particles were fabricated via a postsynthesis desilication treatment with tetrapropylammonium hydroxide and a postsynthesis silylation treatment with hexamethyldisiloxane (HMDSO). The successful preparation of HTS-1 particles was verified by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy, and Fourier-transform infrared spectroscopy. X-ray diffraction patterns and ultraviolet-visible spectra confirmed that the hydrophobic modification had no effect on the zeolite structure of HTS-1 particles. Stable Pickering emulsions of aqueous hydrogen peroxide in either 1-hexene or cyclohexene could be prepared using HTS-1 particles as emulsifiers and confirmed by cryo-SEM images. The catalytic behavior in the obtained Pickering emulsions revealed a parabolic distribution of turnover frequency values with respect to the hydrophobization degrees with 0.2-HMDSO/HTS-1 particles possessing the maximum values of 20.6 h-1 for 1-hexene epoxidation and 8.1 h-1 for cyclohexene epoxidation. In addition, these 0.2-HMDSO/HTS-1 particles showed good reusability for more than five cycles
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Wang, Fumin
|e verfasserin
|4 aut
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1 |
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|a Zhang, Xubin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Binks, Bernard P
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 34(2018), 1 vom: 09. Jan., Seite 302-310
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:34
|g year:2018
|g number:1
|g day:09
|g month:01
|g pages:302-310
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|u http://dx.doi.org/10.1021/acs.langmuir.7b03633
|3 Volltext
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|d 34
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|h 302-310
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