The successful development of eosin-Y and sulfur-codoped g-C ₃ N ₄ composite as a highly efficient photocatalyst for the regeneration of NADH/NADPH (64.38%/81.14%) and the light-driven oxidation of sulfide to sulfoxide with an yield of 99.6%.

We report that generating (formic acid) and regenerating (NADH/NADPH) from CO ₂ and NAD ⁺ /NADP ⁺ using a nitrogen-rich polymeric carbon nitride catalytic–biocatalytic system under solar light ( λ > 420 nm) could provide a new approach for storage of clean energy.