Abstract
Owing to the efficient transfer of charges between layers, two dimensional (2D) heterojunctions have attracted much attention in the development of photocatalysts. While how to achieve close interface contact between different materials is still a principal problem. In this work, the hydrogen bonding in graphene carbon nitride (CN) is fractured by alkali conditions, and CN is converted into highly dispersed water-soluble nanowires (S–CN). Thereby the self-assembly of S–CN on the rGO nanosheets is realized by the recombination of new hydrogen bonding to construct a 2D heterojunction with intimate interfacial contact. Because of the efficient transfer of charges in composite interface, S–CN/rGO (2%) exhibits an excellent photocatalytic hydrogen production performance, which is 5 times that of CN/rGO (2%). The efficient transportation of charges and photocatalytic mechanism in 2D heterostructure are studied by FTIR, TEM, XPS, i-t and other characterizations. It supplies a new approach for developing novel 2D heterojunction through intermolecular self-assembly.
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