Synthesis, characterization and photo-epoxidation performance of Au-loaded photocatalysts

Journal of Chemical Sciences

Jeffrey C S Wu1¹  Hsiang-Yu Chan¹  Van-Huy Nguyen¹ 

[1] Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan$$

关键词: Photo-epoxidation;    propylene oxide;    molecular oxygen;    Au-loaded photocatalyst;    titanium silicalite (TS-1).;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Titanium silicalite-1 (TS-1) was synthesized by hydrothermal crystallization. Au-loaded TS-1 (Au/TS-1) was prepared by the photo-deposition method. The prepared photocatalysts have been fully characterized by Raman, Brunauer-Emmett-Teller (BET), transmission electron microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and ultraviolet visible light spectroscopy to reveal their structure, surface morphology and chemical composition. Photocatalytic activity of these photocatalysts was ascertained by gas phase photo-epoxidation of propylene-to-propylene oxide in the presence of molecular oxygen only under light irradiation. No sacrificial reductant such as hydrogen was used during the photoreaction. Au/TS-1 photocatalyst remained highly stable under reaction conditions. It is found that the increased Ti3+ sites due to the incorporation of Au will not only enhance the selectivity of the photocatalyst to form epoxide but also its stability during C3H6 conversion.

【 授权许可】

Unknown