ZnMxFe2-xO4 (M=Cr, Bi) Nanoparticles-modified electrochemical sensors: Effect on sensitivity and first-order kinetic rate constant

We present here screen-printed carbon-based electrochemical (SPCE) sensors modified with ZnMxFe2-xO4 (M=Cr, Bi; x = 0, 1, 2). Paracetamol was used to study the electrochemical sensing performance of these newly developed sensors. We reported the sensitivity (S) and first-order kinetic rate constant (k) of 6 types of sensors while comparing their performances. High improvement has been observed in S and k compared to the bare carbon sensor. Among the new sensors, the ZnFe2O4 has the highest S and k while the ZnBi2O4 one shows the lowest S and k.

Automated summary

In this study, screen-printed carbon-based electrochemical sensors modified with ZnMxFe2-xO4 were developed and their performance in electrochemical sensing of paracetamol was investigated. The sensitivity and first-order kinetic rate constant of 6 types of sensors were compared, showing significant improvement compared to the bare carbon sensor. Among the new sensors, ZnFe2O4 exhibited the highest sensitivity and rate constant, while ZnBi2O4 showed the lowest.