Vanadium‐based catalysts are considered the most promising materials to replace cobalt‐based catalysts for the activation of peroxymonosulfate(PMS)to degrade organic pollutants.However,these traditional vanadium spe...Vanadium‐based catalysts are considered the most promising materials to replace cobalt‐based catalysts for the activation of peroxymonosulfate(PMS)to degrade organic pollutants.However,these traditional vanadium species easily leak out metal ions that can affect the environment,even though the of vanadium is much less than that of cobalt.Compared to other vanadium‐based cata‐lysts,e.g.,V_(2)O_(3),fluorinated V_(2)AlC shows a high and constant activity and reusability regarding PMS activation.Furthermore,it features extremely low ion leakage.Active oxygen species scavenging and electron spin resonance measurements reveal that the main reactive oxygen species was 1O_(2),which was induced by a two‐dimensional confinement effect.More importantly,for the real‐life application of tetracycline(TC)degradation,the introduction of fluorine changed the adsorption mode of TC over the catalyst,thereby changing the degradation path.The intermediate products were detected by liquid‐chromatography mass spectroscopy(LC‐MS),and a possible degradation path was proposed.The environmental impact test of the decomposition products showed that the toxicity of the degradation intermediates was greatly reduced.Therefore,the investigated ultradu‐rable catalyst material provides a basis for the practical application of advanced PMS oxidation technology.展开更多
文摘Vanadium‐based catalysts are considered the most promising materials to replace cobalt‐based catalysts for the activation of peroxymonosulfate(PMS)to degrade organic pollutants.However,these traditional vanadium species easily leak out metal ions that can affect the environment,even though the of vanadium is much less than that of cobalt.Compared to other vanadium‐based cata‐lysts,e.g.,V_(2)O_(3),fluorinated V_(2)AlC shows a high and constant activity and reusability regarding PMS activation.Furthermore,it features extremely low ion leakage.Active oxygen species scavenging and electron spin resonance measurements reveal that the main reactive oxygen species was 1O_(2),which was induced by a two‐dimensional confinement effect.More importantly,for the real‐life application of tetracycline(TC)degradation,the introduction of fluorine changed the adsorption mode of TC over the catalyst,thereby changing the degradation path.The intermediate products were detected by liquid‐chromatography mass spectroscopy(LC‐MS),and a possible degradation path was proposed.The environmental impact test of the decomposition products showed that the toxicity of the degradation intermediates was greatly reduced.Therefore,the investigated ultradu‐rable catalyst material provides a basis for the practical application of advanced PMS oxidation technology.
