The use of transition metal-activated peroxymonosulfate(PMS)as an advanced oxidation technology has gained recognition.This study developed a catalyst using cobaltDlanthanum bimetallic oxide supported on layered molyb...The use of transition metal-activated peroxymonosulfate(PMS)as an advanced oxidation technology has gained recognition.This study developed a catalyst using cobaltDlanthanum bimetallic oxide supported on layered molybdenum disulfide(Mo S_(2))as a carrier.The CoDLa/Mo S_(2)catalyst was synthesised through coprecipitation,followed by calcination with an optimised metal ratio of Co:La=2:1 to activate PMS and degrade trace chloramphenicol(CAP)in water.The chemical composition of the catalyst was confirmed using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).At catalyst and PMS dosages of 0.1 and 0.5 g·L^(-1),respectively,the degradation rate of CAP was 95%with in 30 min.The catalyst exhibitedstrong resistance to most interfering anions and maintained a high degradation rate at p H 3D11.Liquid chromatographyDmass spectrometry analysis revealed the potential degradation pathways of CAP in the CoDLa/Mo S_(2)(2:1)/PMS system.For other pollutants,such as oxytetracycline,complete degradation was achieved within 20 min,demonstrating the broad applicability of the CoDLa/Mo S_(2)(2:1)/PMS system for the degradation and removal of antibiotic organic contaminants.展开更多
基金supported by the National Key R&D Program of China(No.2019YFC1804400)the Double First-Class University Plan(No.C176220100042)。
文摘The use of transition metal-activated peroxymonosulfate(PMS)as an advanced oxidation technology has gained recognition.This study developed a catalyst using cobaltDlanthanum bimetallic oxide supported on layered molybdenum disulfide(Mo S_(2))as a carrier.The CoDLa/Mo S_(2)catalyst was synthesised through coprecipitation,followed by calcination with an optimised metal ratio of Co:La=2:1 to activate PMS and degrade trace chloramphenicol(CAP)in water.The chemical composition of the catalyst was confirmed using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).At catalyst and PMS dosages of 0.1 and 0.5 g·L^(-1),respectively,the degradation rate of CAP was 95%with in 30 min.The catalyst exhibitedstrong resistance to most interfering anions and maintained a high degradation rate at p H 3D11.Liquid chromatographyDmass spectrometry analysis revealed the potential degradation pathways of CAP in the CoDLa/Mo S_(2)(2:1)/PMS system.For other pollutants,such as oxytetracycline,complete degradation was achieved within 20 min,demonstrating the broad applicability of the CoDLa/Mo S_(2)(2:1)/PMS system for the degradation and removal of antibiotic organic contaminants.
