Efficient visible-light-driven hydrogen production by Zn–porphyrin based photocatalyst with engineered active donor–acceptor sites

Chanda, Nageshwarrao; Devulapally, Koteshwar; Gonuguntla, Spandana; Sreedhar, B.; Pal, Ujjwal; Giribabu, Lingamallu

doi:10.1039/d1ma00342a

Cited by 14 publications

(2 citation statements)

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“…However, it must be noted that detrimental, reverse charge transfer processes can also take place, such as charge recombination between the injected electrons and the dye cation or oxidized TEOA. The ratio between the rates of the forward and backward electron transfer processes is what ultimately dictates the efficiency of the photocatalytic system. ,,,, …”

Section: Resultsmentioning

confidence: 99%

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation

Chanda,

Saini,

Basak

et al. 2023

J. Phys. Chem. C

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In this work, we study a series of benzo [d]pyrrolo-[2,1-b]thiazole-3-carbonitrile (BP) derivatives, which act as sensitizers for photocatalytic hydrogen generation applications. The metal-free BP organic sensitizers 1-and BP-3, respectively, act as light-harvesting units when loaded onto n-type semiconductors. In this study, we paired these sensitizers with the n-type semiconductor platinized TiO 2 to create the materials TiO 2 −BP-1, TiO 2 −BP-2, and TiO 2 −BP-3. TiO 2 −BP-1 showed superior hydrogen generation efficiency compared to TiO 2 −BP-2, TiO 2 −BP-3, and pristine platinized TiO 2 . The electron transfer dynamics that take place between the dyes and TiO 2 were studied using photoemission spectroscopy. The light-harvesting capacity, theoretical highest occupied molecular orbital and lowest unoccupied molecular orbital levels, and redox potential behavior of the sensitizers were evaluated by completing systematic photophysical, electrochemical, and computational studies. For TiO 2 −BP-1, a significant hydrogen generation rate of 3.32 mmol g −1 h −1 , with an apparent quantum yield (AQY) of 8.5% and a turnover number (TON) of 3344, was obtained at 420 nm, thus indicating the excellent light-harvesting capability of the BP-1 sensitizer. The increased photocatalytic activity of the devices when under simulated sunlight shows that BP derivatives have the potential to be useful photosensitizers in sustainable hydrogen generation applications.

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Section: Resultsmentioning

confidence: 99%

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation

Chanda,

Saini,

Basak

et al. 2023

J. Phys. Chem. C

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“…30,31 Metal porphyrin and phenanthroline complexes have been well-reported for their intrinsic, intense and efficient light absorption capacity. [32][33][34] However, detailed investigation is indispensable to generate efficient porphyrin-based redoxactive systems for future commercialization. Recently, we have reported light-stimulated freebase and metalated thianthreneappended porphyrin derivatives, revealing that both derivatives exhibit a charge transfer phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Conducting 1D nanostructures from light-stimulated copper-metalated porphyrin–dibenzothiophene

Ramakrishna,

Naresh,

Bhavani

et al. 2023

Phys. Chem. Chem. Phys.

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Design components of porphyrin-based photocatalytic hydrogen evolution systems: A review

O'Neill

Kearney

Brandon

et al. 2022

Coordination Chemistry Reviews

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Efficient visible-light-driven hydrogen production by Zn–porphyrin based photocatalyst with engineered active donor–acceptor sites

Abstract: Here, we report the fine-tuned Donor-π-Acceptor concept based Zinc-porphyrin sensitized TiO2 photocatalyst for photochemical hydrogen evolution application. The newly designed system showed unprecedented photocatalytic activity. The molecular structure comprises of...

Cited by 14 publications

References 30 publications

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation

Conducting 1D nanostructures from light-stimulated copper-metalated porphyrin–dibenzothiophene

Design components of porphyrin-based photocatalytic hydrogen evolution systems: A review

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Efficient visible-light-driven hydrogen production by Zn–porphyrin based photocatalyst with engineered active donor–acceptor sites

Abstract: Here, we report the fine-tuned Donor-π-Acceptor concept based Zinc-porphyrin sensitized TiO2 photocatalyst for photochemical hydrogen evolution application. The newly designed system showed unprecedented photocatalytic activity. The molecular structure comprises of...

Cited by 14 publications

References 30 publications

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO2 Photocatalysts for Enhanced Hydrogen Generation

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO2 Photocatalysts for Enhanced Hydrogen Generation

Conducting 1D nanostructures from light-stimulated copper-metalated porphyrin–dibenzothiophene

Design components of porphyrin-based photocatalytic hydrogen evolution systems: A review

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Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation

Shedding Light on Benzo[d]pyrrolo[2,1-b]thiazole-3-carbonitrile Sensitizer-Based TiO₂ Photocatalysts for Enhanced Hydrogen Generation