Real-time Raman monitoring during photocatalytic epoxidation of cyclohexene over V-Ti/MCM-41 catalysts

Hsiang Yu Chan, Van Huy Nguyen, Jeffrey C.S. Wu*, Vanesa Calvino-Casilda, Miguel A. Bañares, Hsun-Ling Bai

*此作品的通信作者

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

A 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.

原文English
頁(從 - 到)518-533
頁數16
期刊Catalysts
5
發行號2
DOIs
出版狀態Published - 30 3月 2015

指紋

深入研究「Real-time Raman monitoring during photocatalytic epoxidation of cyclohexene over V-Ti/MCM-41 catalysts」主題。共同形成了獨特的指紋。

引用此