Synergetic photo-epoxidation of propylene with molecular oxygen over bimetallic Au–Ag/TS-1 photocatalysts

doi:10.1016/S1872-2067(17)62832-8

Abstract

Abstract:

Au–Ag bimetallic nanoparticle-supported microporous titanium silicalite-1 catalysts were prepared via a hydrothermal-immersion method, and their structures were examined. These materials serve as efficient catalysts for the photosynthesis of propylene oxide via the epoxidation of propene. The Au/Ag mass ratio and reaction temperature were demonstrated to have significant effects on the catalytic activity and selectivity of propylene oxide. The optimal formation rate (68.3 μmol/g·h) and selectivity (52.3%) toward propylene oxide were achieved with an Au:Ag mass ratio of 4:1. Notably, the strong synergistic effect between Au and Ag resulted in superior photocatalysis of the bimetallic systems compared with those of the individual systems. A probable reaction mechanism was proposed based on the theoretical and experimental results.

Key words: Gold, Silver, Titanium silicalite-1, Photocatalysis, Propene epoxidation, Synergetic effect

Naixu Li, Bin Yang, Ming Liu, Yong Chen, Jiancheng Zhou. Synergetic photo-epoxidation of propylene with molecular oxygen over bimetallic Au–Ag/TS-1 photocatalysts[J]. Chinese Journal of Catalysis, 2017, 38(5): 831-844.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(17)62832-8

https://www.cjcatal.com/EN/Y2017/V38/I5/831

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