Efficient photochemical hydrogen production under visible-light over artificial photosynthetic systems

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• 作者：Jianjun Chen ; Huilan Su ; Yujia Liu ; Yiwei Zeng ; Wang Zhang ; Jiajun Gu ; Woon Ming Lau ; Di Zhang
• 关键词：CdS/Pt&ndash ; TiO2 ; Reticular hierarchical structure ; Artificial photosynthetic systems ; Hydrogen production
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：17 July, 2013
• 年：2013
• 卷：38
• 期：21
• 页码：8639-8647
• 全文大小：2229 K

文摘

Photosynthesis of green plants provides an effective blueprint for transform solar energy into useful hydrogen energy. Thereinto, their hierarchical structures are favorable to the light-harvesting. Meanwhile, the functional components (light-harvesting pigments) can absorb visible wavelengths of sunlight, and offer reaction center for the energy transform. Inspired by these, we contrive an artificial photosynthetic system for the high efficiency of H₂-production rate by introducing a similar functional structure (reticular hierarchical structure) and component (CdS/Pt-TiO₂). The CdS/Pt-TiO₂ with hierarchically reticular structure is prepared by transforming wings into TiO₂ via a sol-gel process, and depositing Pt and CdS nanoparticles onto the TiO₂ substrate by photoreduction and chemical bath deposition method, respectively. Contributing to the couple effect of reticular hierarchical structure and ternary hybrid composition, CdS/Pt-TiO₂ nanocomposites exhibit high visible-light photocatalytic H₂-production rate (12.7 % apparent quantum efficiency obtained at 420?nm). This concept provides a new horizon to exploit solar energy for sustainable energy by imitating the photosynthesis process from structure and ingredients.