| As one of the most important topics in C-1chemical research, photoreduction of CO2to methanol has become a worldwide hot research field in recent years because it is relevant to both energy chemical industry and environmental protection. The research in this field is now still in its infancy and many of the basic problems need to be studied and worked out, such as how to improve the selectivity, quantum efficiency and useful life of the photocatalyst. Based on the latest research, this project adopts the novel metalloporohyrin-ruthenium(â…¡) polypyridy complexes modified the TiO2nanotube as the "organic-inorganic" compound catalysts for reduction of CO2to methanol, so as to recycle CO2.Firstly, We synthesized a series of porphyrin complexes, Ru (â…¡)-polypyridine complexes and porphyrin-Ru (â…¡) polypyridyl supramolecular complexes as the sensitizers to investigate their photosensitized behavior in modifying TiO2-The photocatalytic activities of the modified TiO2were investigated by reducing the CO2aqueous solution to methanol as a probe reaction under Uv-vis light. And we found several important factors that affect the photocatalytic reduction. Secondly, The product of this photosensitive catalysts showed that in addition to methanol some other gas phase products cannot be detected. It proved the catalyst has higher selectivity. Finally the stability of this photosensitive catalyst was verified and we explore the the TiO2photocatalytic photosensitive reaction mechanism,and make some useful explorations for the development of stable, efficient, economical, green, long-life catalysts that can be produced in large scale in the future. |
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