Abstract
? 2022 Elsevier B.V.A highly efficient photocatalytic system was rationally designed and prepared for hydrogen production under visible light. Through a two-step cation exchange reaction with Cd2+ ions under alkaline environment, the metal hydroxide shells were assembled on the surface of MIL-88A. Then the shells were integrated into a heterogeneous metal sulfide shell layer via a thermal vulcanization reaction, which also achieved the doping of transition metals simultaneously. The formed hybrid structure can reduce the volume-surface diffusion length and recombine photogenerated electrons. Moreover, using the molecular cocatalyst (Ni-Salens) in the photocatalytic system can efficiently induce the transfer of photogenerated electrons, thereby improving the catalytic efficiency and stability of this catalytic system. The maximum amount of hydrogen production reached 7956 μmolg-1h-1, significantly higher than that of CdS-based catalysts reported recently. The current work provides an effective and feasible strategy to improve the efficiency of photocatalytic H2 production.
NSTL
Elsevier