The synergistic reaction of photocatalysis and advanced oxidation is a valid strategy for the degradation of harmful antibiotic wastewater.Herein,carbon dots(CDs)modified MIL-101(Fe)octahedrons to form CDs/MIL-101(Fe)...The synergistic reaction of photocatalysis and advanced oxidation is a valid strategy for the degradation of harmful antibiotic wastewater.Herein,carbon dots(CDs)modified MIL-101(Fe)octahedrons to form CDs/MIL-101(Fe)composite photocatalyst was synthesized for visible light-driven photocatalytic/persulfate(PS)-activated tetracycline(TC)degradation.The electron spin resonance(ESR)spectra,scavenging experiment and electrochemical analysis were carried out to reveal that the high visible light-driven photocatalytic degradation activity of TC over CDs/MIL-101(Fe)photocatalysts is not only ascribed to the production of free active radicals in the CDs/MIL-101(Fe)/PS system(·OH,·SO_(4-),^(1)O_(2),h^(+)and·O_(2)^(-))but also attributed to the consumption of electrons caused by the PS,which can suppress the recombination of photo-generated carriers as well as strong light scattering and electron trapping effects of CDs.Finally,the possible degradation pathways were proposed by analyzing intermediates via liquid chromatography-mass spectrometry technique.This research presents a rational design conception to construct a CDs/PS-based photocatalysis/advanced oxidation technology with high-efficient degradation activity for the remediation of organic antibiotic pollutant wastewater and for the improvement of carrier transport kinetics of photocatalysts.展开更多
通过溶剂热法合成了拉瓦锡材料研究所骨架材料(Materials of Institute Lavoisier,MILs)中的MIL-101(Fe)材料,将其应用于活化过二硫酸盐(PDS)降解罗丹明B(RhB),并优化了反应物配比、合成温度、合成时间等制备条件,优化后的MIL-101(Fe)...通过溶剂热法合成了拉瓦锡材料研究所骨架材料(Materials of Institute Lavoisier,MILs)中的MIL-101(Fe)材料,将其应用于活化过二硫酸盐(PDS)降解罗丹明B(RhB),并优化了反应物配比、合成温度、合成时间等制备条件,优化后的MIL-101(Fe)催化活性得到有效提升。同时探究了MIL-101(Fe)/PDS体系催化降解RhB的最佳反应条件,在RhB初始质量浓度为10 mg/L、PDS投加量为6 mmol/L、催化剂投加量0.2 g/L、初始pH=3、t=25℃的条件下,t<20 min,RhB去除率即可达到100%。展开更多
基金the funding support from the National Natural Science Foundation of China(21906072,22006057)the Natural Science Foundation of Jiangsu Province(BK20190982)“Doctor of Mass entrepreneurship and innovation”Project in Jiangsu Province。
文摘The synergistic reaction of photocatalysis and advanced oxidation is a valid strategy for the degradation of harmful antibiotic wastewater.Herein,carbon dots(CDs)modified MIL-101(Fe)octahedrons to form CDs/MIL-101(Fe)composite photocatalyst was synthesized for visible light-driven photocatalytic/persulfate(PS)-activated tetracycline(TC)degradation.The electron spin resonance(ESR)spectra,scavenging experiment and electrochemical analysis were carried out to reveal that the high visible light-driven photocatalytic degradation activity of TC over CDs/MIL-101(Fe)photocatalysts is not only ascribed to the production of free active radicals in the CDs/MIL-101(Fe)/PS system(·OH,·SO_(4-),^(1)O_(2),h^(+)and·O_(2)^(-))but also attributed to the consumption of electrons caused by the PS,which can suppress the recombination of photo-generated carriers as well as strong light scattering and electron trapping effects of CDs.Finally,the possible degradation pathways were proposed by analyzing intermediates via liquid chromatography-mass spectrometry technique.This research presents a rational design conception to construct a CDs/PS-based photocatalysis/advanced oxidation technology with high-efficient degradation activity for the remediation of organic antibiotic pollutant wastewater and for the improvement of carrier transport kinetics of photocatalysts.
文摘通过溶剂热法合成了拉瓦锡材料研究所骨架材料(Materials of Institute Lavoisier,MILs)中的MIL-101(Fe)材料,将其应用于活化过二硫酸盐(PDS)降解罗丹明B(RhB),并优化了反应物配比、合成温度、合成时间等制备条件,优化后的MIL-101(Fe)催化活性得到有效提升。同时探究了MIL-101(Fe)/PDS体系催化降解RhB的最佳反应条件,在RhB初始质量浓度为10 mg/L、PDS投加量为6 mmol/L、催化剂投加量0.2 g/L、初始pH=3、t=25℃的条件下,t<20 min,RhB去除率即可达到100%。
