| 초록 |
Photocatalysis is the simplest water-splitting approach, more amenable to cheap, large-scale applications of H2 generation. Herein, we have designed a multijunction metal free catalyst based on g-C3N4 and different size of graphene quantum dots. g-C3N4 is an earth-abundant and low-cost photocatalyst capable of generating H2 and H2O2 from water even in the absence of catalytic metals, albeit with a low QE. Graphene quantum dots (monodisperse graphene particles less than 10 nm in diameter) exhibit unique photo-induced electron transfer, photoluminescence, and electron reservoir properties. In particular, graphene quantum dots possess high catalytic activity (by chemical catalysis; no light is needed) for H2O2 decomposition. Given the photocatalytic properties of graphene quantum dots and C3N4, we hypothesize that a combination of graphene quantum dots and C3N4 could constitute a high-performance composite photocatalyst for H2 production via overall water splitting. |
