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Photocatalytic oxygenation of sulfide using solar light and ingenious GQDs@AQ catalyst: Mechanistic and synthetic investigations

Siddique, R and Yadav, RK and Singh, S and Shahin, R and Dubey, AK and Singh, AK and Singh, AK and Gupta, NK and Baeg, JO and Kim, TW (2023) Photocatalytic oxygenation of sulfide using solar light and ingenious GQDs@AQ catalyst: Mechanistic and synthetic investigations. In: Photochemistry and Photobiology .

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Official URL: https://doi.org/10.1111/php.13859


The combination of excellent electronic properties and thermal stability positions orange-derived graphene quantum dots (GQDs) as promising materials for solar light-based applications. Researchers are actively exploring their potential in fields such as photovoltaics, photocatalysis, optoelectronics, and energy storage. Their abundance, cost-effectiveness, and eco-friendly nature further contribute to their growing relevance in cutting-edge scientific research. Furthermore, only GQDs are not much more effective in the UV-visible region, therefore, required band gap engineering in GQDs material. In this context, we designed GQDs-based light harvesting materials, which is active in UV-visible region. Herein we synthesized GQDs coupled with 2,6-diaminoanthrquninone (AQ), that is, GQDs@AQ light harvesting photocatalyst the first time for the oxidation of sulfide to sulfoxide under visible light. For the integrating reactions of sulfide in aerobic conditions under visible light by GQDs@AQ photocatalyst exhibit utmost higher photocatalytic activity than simple GQDs due to low molar extinction coefficient and slow recombination charges. The use of GQDs@AQ light harvesting photocatalyst, showed the excellent organic transformation efficiency of sulfide to sulfoxide with excellent yield (94). The high efficiency and excellent yield of 94 indicate the effectiveness of GQDs@AQ as a photocatalyst for these specific organic transformations. © 2023 American Society for Photobiology.

Item Type: Journal Article
Publication: Photochemistry and Photobiology
Publisher: John Wiley and Sons Inc
Additional Information: The copyright for this article belongs to the authors.
Department/Centre: Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited: 24 Nov 2023 11:15
Last Modified: 24 Nov 2023 11:15
URI: https://eprints.iisc.ac.in/id/eprint/83248

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