Facile synthesized low-cost MoS2/CdS nanodots-on-nanorods heterostructures for highly efficient pollution degradation under visible-light irradiation

Semiconductor-based photocatalytic degradation of organic pollutant shows bright prospect and has potential to address the global environmental issues. But the low efficiency, currently, is still an obstacle, which stems from ultrafast charge recombination. In this manuscript, MoS2/CdS nanodots-on-nanorods heterostructures were successfully synthesized via a novel but facile one-pot solvothermal approach with less time and energy consumption. The in-situ synthesized MoS2/CdS heterostructures with intimate interface between MoS2 and CdS facilitate photogenerated charge transportation and separation. Besides, the discrete distribution of MoS2 nanodots on CdS nanorods offers a great many active sites for organic dye degradation. As a result, the optimized MoS2/CdS hybrid shows an excellent photodegradation performance of rhodamine B (RhB) with 99.11% of RhB decomposition in 45 min, which is the advanced among all the similar catalytic systems. Our findings will give inspiration for developing low-cost and efficient catalysts for photodegradation of organic pollutants.