ZnM x Fe 2-x O 4 (M = Cr, Bi) Nanoparticles-modified electrochemical sensors: Effect on sensitivity and 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.