Cellulose nanofibrils/carbon dots composite nanopapers for the smartphone-based colorimetric detection of hydrogen peroxide and glucose

References

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500Cellulose nanofibrils/carbon dots composite nanopapers for the smartphone-based colorimetric detection of hydrogen peroxide and glucosehttps://doi.org/10.1016/j.snb.2020.129330CompositeFe-doped carbon dots (FeCDs) immobilized on cellulose nanofibrils (CNF) (CNF/FeCDs)

Materials

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BET
b nanozyme
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500CNF/FeCDs40.9nmDLSThe corresponding size-distribution analysis (Fig. 1b) unveiled their narrow size distribution in the range of 2–7 nm with a mean diameter of 4.0 ± 0.9 nm, which confirmed that it was a good candidate for doping additive.

Kinetics

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500CNF/FeCDsPODH2O23.7mM8.71-8M/s500
500Fe@Fe3O5@heparinPODH2O25.30.18mM2.21-8M/s500500
500CNF/FeCDsPODTMB0.43mM10-8M/s500500

Applications

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500CNF/FeCDsSmartphone-based colorimetric detection of hydrogen peroxide and glucoseglucoseColor10-70μM1.73μM
500CNF/FeCDsSmartphone-based colorimetric detection of hydrogen peroxide and glucoseH2O2Color6-42μM0.93μM