Plasma nickel nanoparticle photothermic assisted bimetallic sulfide degradation performance of typical neonicotinoid pesticides

Organic pollutants can cause persistently negatively environmental and health effects. Photocatalysis is a promising strategy for the degradation of organic pollutants. Consequently, the design and synthesis of efficient and environmentally friendly photocatalysts for the organic pollution removal have received widespread attention. In this study, we prepared a CdS/MoS2/Ni multi-material(CMN) that can give rise to coupled photothermal and plasmon resonance effect under visible light irradiation, in which the temperature of CMN-2 is increased to 99.56 ℃ with irradiation 10 min, demonstrating a high efficiency for degradation of nitenpyram (NTP). CMN with a reasonable band structure exhibits higher electron transfer rate and separation efficiency as well as lower recombination rate of photogenerated charge. Besides, the high electrical conductivity triggered by the coupled effects significantly accelerated the reaction of the CMN composites to degrade NTP. The highest removal efficiency of NTP is up to 89% within 50 min and its apparent rate constant is 2.35 and 13 times as that of initial CdS and MoS2, respectively. Finally, two possible NTP photodecomposition pathways were proposed based on the intermediates detected by liquid chromatography-mass spectroscopy (LC-MS).