https://scholars.lib.ntu.edu.tw/handle/123456789/406426
標題: | Photocatalytic hydrogenation and reduction of CO 2 over CuO/ TiO 2 photocatalysts | 作者: | Edelmannová, M. Lin K.-Y. Wu J.C.S. Troppová, I. Čapek, L. Kočí, K. |
關鍵字: | CO 2;CuO/TiO 2;Photocatalysis;Photocurrent;Work function | 公開日期: | 2018 | 卷: | 454 | 起(迄)頁: | 313-318 | 來源出版物: | Applied Surface Science | 摘要: | Photocatalytic hydrogenation of carbon dioxide is one of the promising technologies which can convert carbon dioxide under ambient condition to sustainable fuels, such as methane and methanol. The pure TiO 2 and copper doped TiO 2 photocatalysts with 1, 3 and 5 wt.% CuO were prepared by sol-gel processing within reverse micelles and characterized by N 2 physisorption, UV¡VVis, XRD, TPR, Raman spectroscopy, photoelectrochemical measurement and analysis of work function. Two types of experimental photocatalytic hydrogenation and reduction of CO 2 in the liquid phase and gas phase, respectively, were carried out under hydrogen. In the case of reaction in liquid phase, the highest yield of CH 4 was found in the presence 5 wt.% CuO/TiO 2 and pure TiO 2 . Activity of photocatalysts was affected mainly by two factors: the availability of active sites (S BET ) and the work needed to move the electron from surface (work function). In gas reaction, the most CH 4 and CO were generated in order: TiO 2 > 3 wt.% CuO/TiO 2 > 5 wt.% CuO/TiO 2 > 1 wt.% CuO/TiO 2 . In the gas phase, the enhanced photocatalytic performance was connected with better separation of the generated charge carriers. ? 2018 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/406426 | ISSN: | 01694332 | DOI: | 10.1016/j.apsusc.2018.05.123 |
顯示於: | 化學工程學系 |
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