Мақола

Solar Driven Photocatalytic Activity of Porphyrin Sensitized TiO2: Experimental and Computational Studies

S.O. OtienoCentre for Advanced Materials Research (CAMaR), Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, CanadaAnabel E. LanternaSchool of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UKJohn MackInstitute for Nanotechnology Innovation, Rhodes University, Makhanda 6139, South AfricaSolomon DereseDepartment of Chemistry, University of Nairobi, Nairobi 00100, KenyaEdith AmuhayaSchool of Pharmacy and Health Sciences, United States International University—Africa, Nairobi 00800, KenyaTebello NyokongInstitute for Nanotechnology Innovation, Rhodes University, Makhanda 6139, South AfricaJ. C. ScaianoCentre for Advanced Materials Research (CAMaR), Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada

2021en

ABI

Аннотация

The absence of a secure long-term sustainable energy supply is recognized as a major worldwide technological challenge. The generation of H2 through photocatalysis is an environmentally friendly alternative that can help solve the energy problem. Thus, the development of semiconductor materials that can absorb solar light is an attractive approach. TiO2 has a wide bandgap that suffers from no activity in the visible spectrum, limiting its use of solar radiation. In this research, the semiconductor absorption profile was extended into the visible region of the solar spectrum by preparing porphyrin-TiO2 (P-TiO2) composites of meso-tetra(4-bromophenyl)porphyrin (PP1) and meso-tetra(5-bromo-2-thienyl)porphyrin (PP2) and their In(III), Zn(II) and Ga(III) metal complexes. Density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were performed on the porphyrins to gain insight into their electron injection capability. The results demonstrate that P-TiO2 systems merit further in-depth study for applications that require efficient photocatalytic H2 generation.

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DOI: 10.3390/molecules26113131

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