Construction S-scheme of 2D Nanosheets/1D Nanorod Heterojunction with Compact Interface Contact by Electrostatic Self-Assembly for Efficient Photocatalytic Hydrogen Evolution

With the increasing scarcity of resources, the search for green and available energy has become an urgent need. Among them, photocatalytic decomposition of water to hydrogen production has been widely studied. According to zeta potential and XRD characterization, NiCo2O4 and CuS were successfully reassembled by electrostatic self-assembly to construct S-scheme heterojunction induced by built-in electric site, which can accelerate the reaction. At the same time, under simulated visible light irradiation, the composite catalyst can rapidly decompose aqueous triethanolamine solution to produce hydrogen. The composite catalyst has high photocatalytic activity and shows a durable and efficient hydrogen generation effect. By studying the photogenerated carrier separation and transfer of the catalyst, the results show that the composite catalyst can accelerate the photogenerated carrier separation and transfer, so that it can participate in the photocatalytic reaction faster. It provides various insights into the construction of different heterojunctions in binary composite catalysts.