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Título

Real-Time Raman Monitoring during Photocatalytic Epoxidation of Cyclohexene over V-Ti/MCM-41 Catalysts

AutorChan, Hsiang-Yu; Nguyen, Van-Huy; Wu, Jeffrey C.S.; Calvino Casilda, Vanesa ; Bañares González, Miguel Ángel; Bai, Hsunling
Palabras claveCyclohexene
Epoxidation
Photocatalysis
V-Ti/MCM-41 photocatalyst
Real-time Raman spectroscopy
Fecha de publicación30-mar-2015
EditorMultidisciplinary Digital Publishing Institute
CitaciónCatalysts 5(2): 518-533 (2015)
ResumenA series of V- and/or Ti-loading MCM-41 catalysts are successfully synthesized with a hydrothermal method. The photocatalytic and thermal epoxidations of cyclohexene in the presence of tert-butyl hydroperoxide (t-BuOOH) were investigated with real-time monitored by NIR-Raman spectroscopy. It suggests that both V- and Ti-loading can be responsible for the cyclohexene epoxidation. Moreover, the complementary behavior of V- and Ti-loading may be related to a similar role of activation. Interestingly, the progress of the photo-epoxidation on V0.25Ti2/MCM-41 photocatalyst was monitored by changes in intensity of the characteristic Raman bands without interference from the UV-light irradiation. The result, for the first time, reveals that cyclohexene was directly photo-epoxidized to 1,2-epoxycyclohexane by t-BuOOH during the reaction. A possible mechanism of cyclohexene photo-epoxidation is also proposed for this study.
Versión del editorhttp://dx.doi.org/10.3390/catal5020518
URIhttp://hdl.handle.net/10261/137613
DOI10.3390/catal5020518
ISSN2073-4344
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