Criticial Assessment of the Photocatalytic Reduction of Cr(VI) over Au/TiO2

Catalysts

卷:8

Dirk Hollmann¹  AnhBinh Ngo²  HongLien Nguyen³ 

[1] Institute for Chemistry, University of Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany;

[2] Leibniz-Institute for Catalysis, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany;

[3] School of Chemical Engineering, Hanoi University of Science and Technology, Dai Co Viet Street no.1, 100000 Ha Noi, Vietnam;

关键词: photocatalysis;    Au/TiO₂;    Cr(VI) reduction;    citric acid;    adsorption;   

DOI  :  10.3390/catal8120606

来源: DOAJ

【 摘 要 】

The purification of drinking water is one of the most urgent challenges in developing countries, for which the efficient removal of traces of heavy metals, e.g., Cr(IV), represents a key technology. This can be achieved via photocatalysis. In this study, we compare the performance of Au/TiO₂ to bare TiO₂ P25 catalysts. Furthermore, the influence of the sacrificial reagent citric acid under UV-Vis and Vis excitation was investigated and a detailed investigation of the catalysts before and after reaction was performed. During the photocatalytic reduction of Cr(IV) under acidic conditions, both leaching of Au, as well as absorption of Cr, occur, resulting in new catalyst systems obtained in situ.

【 授权许可】

Unknown