Crystal planes cracking process produced MoS2-based composite catalyst for electrocatalytic and near-infrared region photocatalytic applications

Abstract

As a useful strategy, defect engineering is often used for structure design to produce desirable defect-rich crystal plane through crystal cracking process. Here, defect engineering successfully induces the defined and fragmented growth of MoS2 crystal lattice, ultimately promoting the in situ growth of MoS2 nanomaterials on the as-prepared free-standing Ti/TiO2 nanowires (TiO2 NWs). Present results also confirmed that, the shape of MoS2 nanomarterials could be controlled through precursor concentration, and the post-crystallization treatment of TiO2 NWs/MoS2 nanomaterials reduce the onset potential and catalytic current density over hydrogen evolution reaction activity test. By taking advantage of the excellent photoresponse performance of the near-infrared Zn doped CuInSe2 quantum dots, the composite photocatalyst with configuration of TiO2 NWs/MoS2 QDs/ZCISe QDs displayed good photocatalytic activity for the efficient removal of Cr(VI) within 120 min and evolution of hydrogen.