Photocatalytic splitting of seawater and degradation of methylene blue on CuO/nano TiO₂

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• 作者：A.-J. Simamora ; T.-L. Hsiung ; F.-C. Chang ; T.-C. Yang ; C.-Y. Liao ; H. Paul Wang
• 关键词：Photocatalysis ; Hydrogen ; Nano TiO2 ; XANES
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：37
• 期：18
• 页码：13855-13858
• 全文大小：410 K

文摘

The main objective of this study was to prepare effective photocatalysts for splitting of seawater for solar fuel - H₂ and degradation of seawater organic pollutants such as dyes. To enhance photocatalytic activities, CuO is supported on nano TiO₂ (CuO/nano TiO₂). By X-ray absorption near edge structure (XANES) spectroscopy, CuO clusters are found on nano TiO₂. The 2.5 % CuO/nano TiO₂ has greater activities in photocatalytic splitting of water and seawater than nano TiO₂ by 9.9 and 7.8 times, respectively. Interestingly, the 2.5 % CuO/nano TiO₂ is also very active for photocatalytic splitting of water and seawater contaminated with dyes such as methylene blue (MB) (10?ppm). Under a 5-h irradiation of the UV-Vis light, about 99 % of MB is degraded while 3.1?¦Ìmol/h g cat of H₂ are generated from seawater in the photocatalysis process.