How does the CNTs/GCN hybrid improve the photocatalytic oxidation of benzyl alcohol in a Pickering emulsion system?

Label:chem

Topic
Photocatalytic oxidation is a green approach for organic synthesis, but most photocatalysts exhibit poor affinities toward organic substrates. Pickering emulsions offer an ideal catalytic platform where the photocatalyst acts as a solid emulsifier, dispersing at the oil-in-water or water-in-oil interface.

From: "Solar-Driven Selective Benzyl Alcohol Oxidation in Pickering Emulsion Stabilized by CNTs/GCN Hybrids Photocatalyst", Catalysts 2025, 15(8), 753;
Answer
The CNTs/GCN hybrid improves the photocatalytic oxidation of benzyl alcohol in a Pickering emulsion system by serving dual roles as both a solid emulsifier and a photocatalyst. The hydrophobic CNTs enhance the affinity of benzyl alcohol to the hybrid surface, while the improved charge separation efficiency due to CNTs' conductivity leads to higher photocatalytic activity. This results in a three-fold increase in benzyl alcohol conversion efficiency compared to a traditional oil–water non-emulsion system.
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