Electrochemical detection of methyl-paraoxon based on bifunctional nanozyme with catalytic activity and signal amplification effect

References

Loading, please wait
ref
title
DOI
material type
comment
656Electrochemical detection of methyl-paraoxon based on bifunctional nanozyme with catalytic activity and signal amplification effecthttps://doi.org/10.1016/j.jpha.2020.09.002Metal oxideA new electrochemical sensor for organophosphate pesticide (methyl-paraoxon) detection based on bifunctional cerium oxide (CeO2) nanozyme is here reported for the first time. Methyl-paraoxon was degraded into p-nitrophenol by using CeO2 with phosphatase mimicking activity.

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
656CeO23~4nmXRDThe synthesized CeO2 were uniform in size and the estimated average diameter was between 3 and 4 nm.The small and uniform particle size provides a larger specific surface area and more active sites, leading to superior enhanced performance in electrochemical detection.

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
656CeO2hydrolase656

Applications

Loading, please wait
ref
material
application
target
method
linear range
linear ran unit
LOD
lod unit
recovery
comment
656CeO2pesticide detection.Methyl-paraoxonE-chem0.1-100 and 0.1-10μM/L0.06μM/LWhat's more, the oxidation peak current increased linearly with MP concentration in the ranges of 0.1–10 μmol/L and 10–100 μmol/L, with correlation coefficients (R2) higher than 0.99 for both two analytical curves (n=3, Fig. 6B).