Hydrothermal synthesis of Se-doped MoS2 quantum dots heterojunction for highly efficient photocatalytic degradation

Abstract In this work, we were demonstrated that the synthesis and photocatalytic performance of MoSSe quantum dots (QDs) for degradation of organic pollutants. Congo red (CR) solution was taken as the target compound to check the photocatalysis. As intended, the MoSSe QDs observe enhanced photocatalytic activity approximately 5.26–6.25 times higher compared to bulk components after 60 min under visible light. In addition, the radical-trapping tests and electron spin resonance also demonstrate that superoxide radicals and photo-induced holes are primary reactive species for photodegradation. MoSSe QDs exhibited great photodegradation of CR under simulated sunlight, which mostly refer to the quantum confinement effect from high specific surface area and excellent separation of the photo-induced electron and hole pairs.