Facile development of CoAl-LDHs/RGO hybrid as photocatalysts for efficient hydrogen generation from water splitting under visible-light irradiation
The development of clean and renewable energy has been received great interest recently ascribed to increasing environmental concerns and depleting of conventional fossil fuels. The photocatalytic water splitting is considered as low cost and high effective technology for generation of green hydrogen (H2) fuel. In the present study, we have successfully prepared the cobalt-aluminum layered double hydroxides/reduced graphene oxides (CoAl-LDHs/RGO) hybrids via a simple solvothermal method and used as photocatalytic material for H2 production by water splitting. The photocatalytic water splitting result indicates that the as-prepared CoAl-LDHs/RGO hybrids display an enhanced H2 production of 1571.84 μmol h-1 g-1 compared with pure CoAl-LDHs (430.14 μmol h-1g-1) under visible-light irradiation. This enhanced performance of CoAl-LDHs/RGO hybrids is mainly due to efficient transfer and separation of the photo-generated charge carriers by a strong electronic coupling effect in the interface of CoAl-LDHs and RGO. Therefore, the obtained CoAl-LDHs/RGO hybrid can be a promising photocatalytic material for energy harvesting and environmental remediation work.