Mo-Doped ZnIn_2S_4 Flower-Like Hollow Microspheres forImproved Visible Light-Driven Hydrogen Evolution

摘要

Designing robust visible light-driven photocatalysts in terms of the structure andcomponent is an important way for achieving efficient solar hydrogen production.Herein, Mo-doped ZnIn_2S_4 (M-ZIS) flower-like hollow microspheres assembledby ultrathin nanosheets are reported. The as-prepared M-ZIS samples achieve anenhanced H2 generation rate of 4.62mmol g~（-1） h~（-1） under visible light, ten timeshigher than that of pristine ZIS. The 3D hollow microspheres structure assembledby nanosheets ensures sufficient light harvesting and exposure of moreactive sites. Meanwhile, the doping of Mo is propitious to regulate the chemicalcharacteristic and electronic structure of ZIS in the merit of ameliorated hydrophilicity,extended light adsorption, accelerated transfer-separation efficiency ofcharge carriers, as well as the reduced overpotential of H2 evolution. This modelis put forward to obtain an in-depth understanding of the role that both the 3Dhollow hierarchical structure and doping atoms play in photocatalytic water splitting.