Composite photocatalyst containing Eosin Y and multiwalled carbon nanotubes loaded with CuO/NiO: Mixed metal oxide as an active center of H₂ evolution from water

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• 作者：Shi-Zhao Kang^a ; Lili Chen^b ; Xiangqing Li^a ; Jin Mu^a ; ^{mujin@sit.edu.cn}
• 关键词：Composite photocatalyst ; Mixed metal oxide ; Carbon nanotubes ; Dye ; H2 evolution
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 June, 2012
• 卷：258
• 期：16
• 页码：6029-6033
• 文件大小：558 K

摘要

A composite photocatalyst containing Eosin Y as a sensitizer, multiwalled carbon nanotubes as a supporter material or electron transfer channel, and CuO/NiO as an active center of H₂ evolution from water was fabricated and characterized with X-ray photoelectron spectroscopy and transmission electron microscope. Meanwhile, photocatalytic hydrogen evolution from water over this catalyst was explored using triethanolamine as a sacrificial reagent under visible irradiation. A rate of H₂ evolution of approximately 1.0 mmol g^鈭? h^鈭? was achieved under optimal conditions. Furthermore, for practical purposes, the photocatalytic hydrogen evolution was studied as a function of content of CuO/NiO, mass ratio of CuO to NiO, pH of solution, concentration of triethanolamine and dosage of Eosin Y, respectively. The results show that mixed metal oxides are a kind of promising active centers of H₂ evolution from water in the photocatalytic system studied.