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 ZnM
x
Fe
2-x
O
4
(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 ZnFe
2
O
4
has the highest S and k while the ZnBi
2
O
4
one shows the lowest S and k.