首页|Multi-channel photogenerated charge transfer in double S-scheme for promoting photostability and mineralization of pollutants
Multi-channel photogenerated charge transfer in double S-scheme for promoting photostability and mineralization of pollutants
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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.
School of Chemistry and Chemical Engineering,Guangdong Provincial Key Lab of Green Chemical Product Technology,State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China
School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China
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