In recent years,carbon dots(CDs)based hybrid nanomaterials have received considerable attention due to their outstanding optical and catalytic properties.Herein,CDs/Fe_(3)O_(4)hybrid nanofibers are prepared via a faci...In recent years,carbon dots(CDs)based hybrid nanomaterials have received considerable attention due to their outstanding optical and catalytic properties.Herein,CDs/Fe_(3)O_(4)hybrid nanofibers are prepared via a facile electrospinning technique combined with a hydrothermal reaction and a thermochemical reduction process.During the synthetic process,α-Fe_(2)O_(3)nanofibers are synthesized via electrospinning followed by a calcination process first.Then CDs modified α-Fe_(2)O_(3)nanofibers can be obtained under a hydrothermal reaction.Finally,the prepared CDs modified α-Fe_(2)O_(3)nanofibers are converted to CDs/Fe_(3)O_(4)hybrid nanofibers through a thermochemical reduction process.The resulting CDs/Fe_(3)O_(4)hybrid nanofibers show a superior peroxidase catalytic activity to individual CDs,α-Fe_(2)O_(3)nanofibers,CDs/α-Fe_(2)O_(3)hybrid nanofibers and commercial Fe_(3)O_(4)nanoparticles.The steady-state kinetic assay exhibits an excellent affinity for TMB with a low Michaelis-Menten constant(Km)value.On the basis of the high peroxidase-like activity of CDs/Fe_(3)O_(4)hybrid nanofibers,a simple approach for the colorimetric detection of H_(2)O_(2)and ascorbic acid(AA)with a low detection limit of 0.917 and 0.285μM,respectively,is developed.This work inspires researchers to develop functional hybrid nanomaterials for fabricating superior biomimetic catalysts and extends their applications in biosensors and environmental monitoring.展开更多
基金supported by the research grants from the National Natural Science Foundation of China(51473065 and 21473068).
文摘In recent years,carbon dots(CDs)based hybrid nanomaterials have received considerable attention due to their outstanding optical and catalytic properties.Herein,CDs/Fe_(3)O_(4)hybrid nanofibers are prepared via a facile electrospinning technique combined with a hydrothermal reaction and a thermochemical reduction process.During the synthetic process,α-Fe_(2)O_(3)nanofibers are synthesized via electrospinning followed by a calcination process first.Then CDs modified α-Fe_(2)O_(3)nanofibers can be obtained under a hydrothermal reaction.Finally,the prepared CDs modified α-Fe_(2)O_(3)nanofibers are converted to CDs/Fe_(3)O_(4)hybrid nanofibers through a thermochemical reduction process.The resulting CDs/Fe_(3)O_(4)hybrid nanofibers show a superior peroxidase catalytic activity to individual CDs,α-Fe_(2)O_(3)nanofibers,CDs/α-Fe_(2)O_(3)hybrid nanofibers and commercial Fe_(3)O_(4)nanoparticles.The steady-state kinetic assay exhibits an excellent affinity for TMB with a low Michaelis-Menten constant(Km)value.On the basis of the high peroxidase-like activity of CDs/Fe_(3)O_(4)hybrid nanofibers,a simple approach for the colorimetric detection of H_(2)O_(2)and ascorbic acid(AA)with a low detection limit of 0.917 and 0.285μM,respectively,is developed.This work inspires researchers to develop functional hybrid nanomaterials for fabricating superior biomimetic catalysts and extends their applications in biosensors and environmental monitoring.
