Carbon dots/Fe₃O₄ hybrid nanofibers as efficient peroxidase mimics for sensitive detection of H₂O₂ and ascorbic acid

Abstract

Carbon dots/Fe3O4 hybrid nanofibers as efficient peroxidase mimics for sensitive detection of H2O2 and ascorbic acid have been developed.

Fe3O4 Nanoparticles Loaded on Lignin Nanoparticles Applied as a Peroxidase Mimic for the Sensitively Colorimetric Detection of H2O2

“…The higher K m value of Fe 3 O 4 NPs with H 2 O 2 was consistent with the reported result that Fe 3 O 4 NPs needs a higher H 2 O 2 concentration than Fe 3 O 4 @LNPs to obtain the comparable V m [11]. Table 1 shows Fe 3 O 4 @LNPs possessed a comparable or stronger affinity to TMB or H 2 O 2 , compared to Fe 3 O 4 NPs prepared by other methods [36,37,38,39]. Conclusively, the metal nanoparticles loaded on lignin nanoparticles improved its dispersion stability in solution and eventually increased its catalytic capacity.…”

Perylene diimide‐modified magnetic γ‐Fe2O3/CeO2 nanoparticles as peroxidase mimics for highly sensitive colorimetric detection of Vitamin C

“…As shown in Figure c, the ∆A was linearly correlated to VC concentration from 0.5 to 5 μM with a LOD of 0.45 μM which was much lower than that of many artificial enzymes (Table S2). The excellent selectivity of this method toward VC detection in comparison with various amino acids was also confirmed (Figure d). Besides, the experiments for detecting real VC sample indicated the excellent performance of this method in real sample analysis.…”

“…In the past decade, the synthesis of magnetic iron oxide nanoparticles has been intensively developed not only for magnetic storage media but also for biosensing applications . To achieve a better performance, the magnetic bases were always decorated by other highly active substrates to realize a synergistic effect, such as Fe 3 O 4 @SiO 2 nanoparticles, Fe 3 O 4 /CeO 2 composite, Fe 3 O 4 /nitrogen‐doped carbon hybrid nanofibers, prussian blue‐modified Fe 2 O 3 nanoparticles, Fe 3 O 4 ‐Pt/core‐shell nanoparticles, and carbon dots/Fe 3 O 4 hybrid nanofibers . Among these decorative materials, CeO 2 exhibits excellent catalytic activities due to its special oxygen storage capacity, which can store and release highly active oxygen species .…”

Advanced synthesis of carbon dots novel insights into temperature effect on fluorescent performance

“…The functional groups on the surface, i. e. hydroxyl, carboxyl and carbonyl, would provide great potential for novel applications in photocatalysis and energy conversion in the near future. The CD based nanofibers by bubble electrospinning or electrospinning [18][19][20][21][22][23][24][25] have received considerable attention due to their outstanding optical and catalytic properties, and the reaction equation can be easily solved by Taylor method [26].…”