Synthesis of MoS_2/rGO nanosheets hybrid materials for enhanced visible light assisted photocatalytic activity

摘要

A facile hydrothermal method has been adopted to synthesize pure MoS_2 nanosheets and MoS_2/rGO nanosheets hybrid. The samples were characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (HRTEM), X-ray diffraction spectroscopy (XRD), Brunauer-Emmett-Teller (BET). The photocatalytic performance and reusability of MoS_2 nanosheets and MoS_2/rGO hybrids was evaluated by discoloring of RhB under visible light irradiation. Results indicated that MoS_2/rGO photocatalysts with large surface area of 69.5 m~2 g~(-1) could completely degrade 50 mL of 8 mg L~(-1) RhB aqueous solution in 90 min with excellent recycling and structural stability as compared with pure MoS_2 nanosheets (53%). Such enhanced performance could be explained due to the high surface area, enhanced light absorption and the increased dye adsorptivity and reduced electron-hole pair recombination with the presence of rGO.