NDLI: Liquid-Phase Cyclohexene Epoxidation with H2O2 over RuO2-Loaded Mesoporous-Assembled TiO2 Nanocrystals: Catalyst Preparation and Recyclability

Content Provider	Springer Nature Link
Author	Woragamon, Kittisak Jongpatiwut, Siriporn Sreethawong, Thammaon
Copyright Year	2010
Abstract	The purpose of this work was to investigate the liquid-phase cyclohexene epoxidation with H2O2 using RuO2-loaded mesoporous-assembled TiO2 nanocrystals. The loading of RuO2 on the mesoporous-assembled TiO2 was performed by two methods: (1) incipient wetness impregnation (IWI) (RuO2/TiO2 (IWI)) and (2) single-step sol–gel (SSSG) (RuO2/TiO2 (SSSG)). Among the investigated RuO2/TiO2 (IWI) and RuO2/TiO2 (SSSG) catalysts, 1 mol.% RuO2/TiO2 (SSSG) calcined at 450 °C was found to possess relatively high catalytic performance based on the cyclohexene conversion and cyclohexene oxide selectivity. The recyclability of the RuO2/TiO2 (IWI) and RuO2/TiO2 (SSSG) catalysts was also investigated. It was found that after three consecutive catalytic reaction cycles, the RuO2/TiO2 (IWI) exhibited a slight decrease in cyclohexene conversion, but a significant decrease in cyclohexene oxide selectivity. On the other hand, the RuO2/TiO2 (SSSG) exhibited almost unchanged conversion and cyclohexene oxide selectivity, indicating its much higher stability. XRF and TPR results indicate that the high stability of the RuO2/TiO2 (SSSG) is due to the strong metal oxide-support interaction.The purpose of this work was to investigate the liquid-phase cyclohexene epoxidation with H2O2 using RuO2-loaded mesoporous-assembled TiO2 nanocrystals prepared by two methods: (1) incipient wetness impregnation (IWI) (RuO2/TiO2 (IWI)) and (2) single-step sol–gel (SSSG) (RuO2/TiO2 (SSSG)). The recyclability of the prepared catalysts was also investigated.
Starting Page	249
Ending Page	259
Page Count	11
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	136
Issue Number	3-4
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2010-03-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cyclohexene epoxidation RuO2/TiO2 Mesoporosity Incipient wetness impregnation Single-step sol–gel Recyclability TPR XRF Physical Chemistry Organometallic Chemistry Industrial Chemistry/Chemical Engineering Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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