Abstract
Superior photo-mineralization of pollutants,outstanding charge separation efficiency and exceptional photostability of catalysts constitute three pivotal factors for the effective photodegradation of organic pollutants.In this study,a dual S-scheme In2O3/Pedot/ln2S3(IO/Pedot/IS),inspired by natural photosyn-thesis,was successfully synthesized for the degradation of lignin and antibiotics.The resulting exceptional semiconductor contact creates a dual-interface electric field on Pedot,facilitating multi-channel charge transport and enhancing charge separation efficiency.The establishment of the dual S-scheme hetero-junction raised the reduction-oxidation potential of the type-Ⅱ In2O3/In2S3.When subjected to 5 W LED irradiation for 60 min,IO/Pedot-2/IS demonstrated a remarkable mineralization rate of 85.8％for sodium lignosulfonate(SL),surpassing the 53.7％mineralization rate achieved by IO/IS.Furthermore,the degra-dation efficiency for tetracycline(TC)and ciprofloxacin(CIP)reached 91％and 88％,respectively.Crucially,the hole(h+)conductivity of Pedot efficiently alleviated the photocorrosion of sulfide,ensuring robust cyclic stability.Experimental simulations of natural photocatalysis showcased the exceptional versatility and applicability of IO/Pedot/IS.In-depth analysis led to the proposal of a potential photodegradation pathway for lignin,based on the intermediates detected through liquid chromatography-mass spectrom-etry(LC-MS).Overall,this study presents an effective strategy for the efficient photocatalytic treatment of organic pollutants.
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