A colorimetric strategy for ascorbic acid sensing based on the peroxidase-like activity of core-shell Fe3O4/CoFe-LDH hybrid

References

Loading, please wait
ref
title
DOI
material type
comment
175A colorimetric strategy for ascorbic acid sensing based on the peroxidase-like activity of core-shell Fe3O4/CoFe-LDH hybridhttps://doi.org/10.1016/j.colsurfb.2019.110742CompositeFe3O4/CoFe-LDH

Materials

Loading, please wait
ref
material
size
size err
size unit
size type
size comment
BET
b nanozyme
b 10n
b unit
specific act
sa 10n
sa unit
comment
175Fe3O4/CoFe-LDH320-350nmTEMAs displayed in Fig. 2a and b, Fe3O4 were well-separated lycheelike spherical structure with mean grain size of about 300 nm. Fig. 2c-e clearly show the core-shell structure where Fe3O4 microspheres were encapsulated in CoFe-LDH nanosheets. Since there were no obvious boundaries between the core and shell, we approximately estimated that the particle sizes of Fe3O4/CoFe-LDH were in the range of 320-350 nm44.5

Kinetics

Loading, please wait
ref
material
enzyme type
substrate
pH
T
km
km err
km 10n
km unit
vmax
vmax err
vmax 10n
vmax unit
kcat
kcat err
kcat 10n
kcat unit
kcat/km
kcat/km 10n
kcat/km unit
comment
175Fe3O4/CoFe-LDHPODTMB5.0RT0.395mM175
175Fe3O4/CoFe-LDHPODH2O25.0RT10.24mM175

Applications

Loading, please wait
ref
material
application
target
method
linear range
linear ran unit
LOD
lod unit
recovery
comment
175Fe3O4/CoFe-LDHA sensitively and selectively visual sensor for the determination of ascorbic acid (AA) was successfully constructed based on the reduction effect of AA with enediol group on the formed oxidation of TMBAscorbic acid (AA)Color0.5-10μM0.2μM98.3%-101.3%