Solvothermal fabrication of MoS2 anchored on ZnIn2S4 microspheres with boosted photocatalytic hydrogen evolution activity.

The MoS 2 /ZnIn 2 S 4 composites with MoS 2 anchored on the surface of ZnIn 2 S 4 microspheres were fabricated by a facile solvothermal method. To clarify the crystal phases, morphologies, chemical compositions, optical properties, and special surface areas of the obtained photocatalysts, the corresponding characterization measurements were performed. The photocatalytic H 2 evolution activities of MoS 2 /ZnIn 2 S 4 composites were evaluated and compared with using lactic acid as sacrificial reagents. The results showed that integrating MoS 2 with ZnIn 2 S 4 could remarkably boost the photocatalytic H 2 evolution performance and the maximum H 2 evolution rate of 201 μmol h −1 was achieved over 1 wt% MoS 2 loading on the ZnIn 2 S 4 , corresponding to the apparent quantum efficiency (AQE) about 3.08% at 420 nm monochromatic light. The photoelectrochemical tests and photoluminescence spectra (PL) versified that the efficient charge transfer and separation were achieved over MoS 2 /ZnIn 2 S 4 composite in contrast with single ZnIn 2 S 4 , which would significantly benefit the enhancement of photocatalytic H 2 activity. This work provides a desired strategy to design and synthesize the visible-light-response photocatalysts with MoS 2 as cocatalysts to enhance the photocatalytic activity. [ABSTRACT FROM AUTHOR]