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<p>The development of efficient visible-light-driven photocatalysts remains a significant challenge in artificial photosynthesis due to limited light absorption and rapid recombination. To overcome this, a dye-sentitized aloe-based graphene photocatalyst was synthesized by coupling ethidium bromide (EtBr) with aloe-based graphene (G), enabling strong and faster interfacial charge transfer. The resulting EtBr/G photocatalyst exhibits efficient photocatalytic nicotinamide adenine dinucleotide (NADH) regeneration from its oxidized form (NAD<sup>+</sup>) up to 27.33% regeneration in 120 mins. Furthermore, the EtBr/G photocatalyst also shows high efficiency towards oxidation reactions by oxidative coupling of benzylamine to the corresponding imine (N, N’ Benzylidenebenzylamine) up to 98.7% yield under visible light. The synergistic interaction between the light-harvesting dye and the conductive graphene results in improved catalytic efficiency with respect to photocatalytic performance. This work reflects the dye-sensitized graphene hybrids as a sustainable and versatile approach towards photocatalytic applications under visible light for selective cofactor cycling and oxidative coupling.</p>

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Visible-Light Photocatalysis over an Ethidium Bromide-Aloe-Derived Graphene Hybrid for Benzyl Amine Oxidation and Rhodium-Catalyzed NADH Regeneration

  • 期刊论文

  • 发表日期：

    2026年6月14日

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  • Shreya Maurya,
  • Rajesh K. Yadav,
  • Shaifali Mishra,
  • Kanchan Sharma,
  • Anupma Yadav,
  • Geeta Srivastava,
  • Jyoti Agrawal,
  • Navneet K. Gupta,
  • D. K. Dwivedi,
  • Jin Ook Baeg

摘要

The development of efficient visible-light-driven photocatalysts remains a significant challenge in artificial photosynthesis due to limited light absorption and rapid recombination. To overcome this, a dye-sentitized aloe-based graphene photocatalyst was synthesized by coupling ethidium bromide (EtBr) with aloe-based graphene (G), enabling strong and faster interfacial charge transfer. The resulting EtBr/G photocatalyst exhibits efficient photocatalytic nicotinamide adenine dinucleotide (NADH) regeneration from its oxidized form (NAD+) up to 27.33% regeneration in 120 mins. Furthermore, the EtBr/G photocatalyst also shows high efficiency towards oxidation reactions by oxidative coupling of benzylamine to the corresponding imine (N, N’ Benzylidenebenzylamine) up to 98.7% yield under visible light. The synergistic interaction between the light-harvesting dye and the conductive graphene results in improved catalytic efficiency with respect to photocatalytic performance. This work reflects the dye-sensitized graphene hybrids as a sustainable and versatile approach towards photocatalytic applications under visible light for selective cofactor cycling and oxidative coupling.