Functional Contrast and Kinetic Analysis of water-Dispersible Carbon Black Nanoparticles and MWNTs in Glucose Biosensors

摘要

Poly (sodium 4-styrenesulfonate) (PSS) was grafted onto carbon black surface by ambient surface-initiated atom radical transfer polymerization. And the carbon paste electrodes modified by CB-g-PSS and MWNTs were completed. CB-g-PSS and MWNTs had no effect on direct electron transfer based on the carbon paste electrode, but increased the redox speed of Fe [(CN)~6]~(3-)/Fe[(CN)~6]~(4-) and led to stronger current response. The experimental results indicate that the sensitivity of modified by CB-g-PSS is 2.1 times of no modified, and MWNTs is 4 times. Measurable linear range is 1.1mmol/L～33.3mmol/L. For sensors modified by CB-g-PSS, testing of different concentration glucose: RSD<7%; sensors modified by MWNTs, RSD<7.5% (glucose < 15mmol/L), RSD<10% (glucose > 15mmol/L) respectively.