A photocatalytic comparison study between tin complex and carboxylic acid derivatives of porphyrin/TiO2 composites
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We synthesized a novel dihydroxotin(IV) porphyrin complex with full structural confirmation. The tin complex further converted to TiO2 composite (PR-2–TiO2) and photodegradation of methylene blue property compared with carboxylic-anchored porphyrin photocatalyst (PR-3–TiO2), basic porphyrin photocatalyst (PR-1–TiO2) and bare TiO2. PR-1–TiO2 showed slight photocatalytic activity, which was better than that of bare TiO2. The photocatalytic performances of tin-porphyrin (PR-2–TiO2) and carboxylic anchor porphyrin (PR-3–TiO2) were comparable, and tin-porphyrin catalyst showed similar stability in their reusability test result in comparison with carboxylic-anchored porphyrin catalyst. Finally, we showed a plausible structure for the tin porphyrin complex between the axial –OH ligand and TiO2 and a suitable mechanism with theoretical comparison for the photocatalytic process.
KeywordsDihydroxotin(IV) porphyrin Photocatalytic Axially coordinated Visible light Photodegradation
This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (Grant No. NRF-2017R1E1A1A01074266). This work was supported by the Industrial Fundamental Technology Development Program (10076350) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea.
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