Thiophene Porphyrins And Metalloporphyrins Synthesis And Modification Of Titanium Dioxide

Porphyrins are a kind of compound which have big ring conjugate structure, they attracted great interests and were widely studied in many research areas as for their unique structure and properties, and become a new frontier of scientific research. It has been verified that porphyrins-TiO₂ can degrade the organic molecules in aqueous solutions efficiently and thus purify water utilizing the solar energy. So far, the dealing polluted water using Porphyrin-TiO₂ photocatalyst can only carry out in the lab, the choosing of photocatalyst is very accidnetal, many porphyrin with flexible chain has been synthesised and made some progress in our lab. Thiophene and polythiophene have been applied in many photoelectric device based on their excellent optical and electrical properties, at the same time, in order to expand our research, the thienyl-appended porphyrin was synthesized using the 2-thiophene aldehyde, aim to get better photocatalytic degradation.In this article,meso-5,10,15,20-tetrakis (2-thienyl) porphyrin(H2TTP) and 5-(2-thienyl)-10,15,20-triphenyl porphyrin (H2MTP) were synthesized, then they reacted with acetate respectively, and we got their corresponding Co(II), Cu(Ⅱ), Zn(Ⅱ) metalloporphyrins. All the compounds were characterized by Elemental Analyses,1HNMR, MS, UV-vis and FT-IR etc. We used metalloporphyrins as photosensitizer, corresponding pohotocatalysts (CoTTP-TiO₂, CuTTP-TiO₂, ZnTTP-TiO₂, CoMTP-TiO₂, CuMTP-TiO₂, ZnMTP-TiO₂) were prepared and characterized by SEM, FT-IR, Diffuse reflectance, XPS etc. Through degradation of 4-nitrophenol in aqueous solution using High-pressure mercury lamp and metal halide lamp as light source, aim to test the photocatalytic effect of catalysts. And also simplely summarized and analyzed some factors (temperatuer, stability of the catalysts etc.) that influence the photocatalytic efficiency. We can conclude from experiments:The organic compound 4-nitrophenol can be degraded effectively under the light. Moreover, the porphyrin-TiO₂ catalysts were proved to possess high stability and photocatalysis, and can be recycled for many times.In addition, electrical properties of these metal porphyrin complexes have been characterized as a lithium/thionyl chloride battery cathode catalysts. The effects of these porphyrin complexes on the discharged voltage and the discharged time of Li/SOCl₂ battery are investgated. As is shown by the experiment:the adding of the porphyrin complexes can prolong the discharge time of Li/SOCl₂ battery to approximately above 20%; the adding of the porphyrin complexes had a few effects on the battery voltage, the voltage equal to the blank battery; the actual battery capacity can also be raised by 20-50%.