Chan H.-Y.Nguyen V.-H.Wu J.C.S.Calvino-Casilda V.Ba?ares M.A.Bai H.2019-05-032019-05-03201520734344https://scholars.lib.ntu.edu.tw/handle/123456789/406449A 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. ? 2015 by the authors, licensee MDPI, Basel, Switzerland.CyclohexeneEpoxidationPhotocatalysisReal-time Raman spectroscopyV-Ti/MCM-41 photocatalyst[SDGs]SDG6journal article10.3390/catal50205182-s2.0-84961289494https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961289494&doi=10.3390%2fcatal5020518&partnerID=40&md5=e69680f5e927cf7803155f9f4c1d30a5