Artificial chloroplast: Au/chloroplast-morph-TiO2 with fast electron transfer and enhanced photocatalytic activity |
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| Authors: | Nan Shi Xiaohui Li Tongxiang Fan Han Zhou Di Zhang Hanxing Zhu |
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| Affiliation: | 1. State Key Laboratory of Metal Matrix Composites, Department of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China;2. School of Engineering, Cardiff University, Cardiff CF24 3AA, UK |
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| Abstract: | The unique structures and functional features of chloroplasts in green plants provide a promising blueprint for greatly improving solar energy utilization efficiency. In this paper, a prototype of artificial chloroplast, Au/chloroplast-morph-TiO2 with natural chloroplasts' nanostructure and analogous functional features, is provided. The nano-layered structures of chloroplast template inherited in the chloroplast-morph-TiO2 lead to a large reaction area and fast photo-induced electron transfer; cocatalyst Au nanoparticles which work as reaction centers promote photo-induced charge separation and improve the overall photocatalytic activity in hydrogen production; Nitrogen and phosphorus self-doped from the bio-template increase visible light absorption, similar to the antenna pigment. With this new inorganic artificial photosynthetic system, we achieve effective light utilization, fast photo-induced charge separation, high electron transfer, enhanced photocatalytic activity for dye degradation rate and improved H2 evolution efficiency. This concept provides the inspiration for constructing efficient photocatalysts by imitating the photosynthesis process from both structures and functions. |
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| Keywords: | Artificial photosynthesis Au/chloroplast-morph-TiO2 Chloroplast Photocatalysis Hydrogen production |
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