A novel nitrogen-doped graphene(NG)supporting magnetic nanoparticles(Fe and Fe_(3)C)was synthesized from g-C_(3)N_(4)and Fe(C_(5)H_(5))_(2).When used as a photocatalyst exposed to visible light,the material was excell...A novel nitrogen-doped graphene(NG)supporting magnetic nanoparticles(Fe and Fe_(3)C)was synthesized from g-C_(3)N_(4)and Fe(C_(5)H_(5))_(2).When used as a photocatalyst exposed to visible light,the material was excellent in degrading tetracycline(TC)in aqueous solutions.Scanning electron microscopy indicated that it had a folded sheet structure,with numerous nanoparticles observed on graphene sheets.Raman spectroscopy confirmed the presence of significant defects in the material,which suppressed the recombination of photogenerated electron-hole pairs.The performance and degradation mechanism of the photocatalyst was verified using a series of optical and electrochemical experiments and theoretical calculations.The degradation efficiency of the catalyst for TC was as high as 97.1%in 120 min under visible light irradiation,which is superior to other reported catalysts.A mechanism study showed that TC is rapidly degraded into CO_(2),H_(2)O and other small inorganic molecules,with holes(h^(+))serving as the primary driving force.The catalyst had an outstanding stability and reusability,and could be easily recovered using an external magnetic field.展开更多
文摘A novel nitrogen-doped graphene(NG)supporting magnetic nanoparticles(Fe and Fe_(3)C)was synthesized from g-C_(3)N_(4)and Fe(C_(5)H_(5))_(2).When used as a photocatalyst exposed to visible light,the material was excellent in degrading tetracycline(TC)in aqueous solutions.Scanning electron microscopy indicated that it had a folded sheet structure,with numerous nanoparticles observed on graphene sheets.Raman spectroscopy confirmed the presence of significant defects in the material,which suppressed the recombination of photogenerated electron-hole pairs.The performance and degradation mechanism of the photocatalyst was verified using a series of optical and electrochemical experiments and theoretical calculations.The degradation efficiency of the catalyst for TC was as high as 97.1%in 120 min under visible light irradiation,which is superior to other reported catalysts.A mechanism study showed that TC is rapidly degraded into CO_(2),H_(2)O and other small inorganic molecules,with holes(h^(+))serving as the primary driving force.The catalyst had an outstanding stability and reusability,and could be easily recovered using an external magnetic field.
