Hybrid PANI@dialdehyde carboxymethyl cellulose/ZnO nanocomposite modified glassy carbon electrode as a highly sensitive electrochemical sensor

In this research, a highly sensitive voltammetric sensor for hydrogen peroxide (H₂O₂) detection has been examined using a new hybrid material based polyaniline, dialdyhayed carboxmethyl cellouse and in the presence of ZnO nanoparticles abbreviated as (PANI/D-CMC/ZnO). Various approaches such as cyclic voltammetry (CV), and differential pulse voltammetry were used to investigate the electrocatalytic reduction of H₂O₂ (DPV). After preparation, (SEM) scanning electron microscopy, (XRD) X-ray diffraction, and (FTIR) Fourier transform infrared techniques were used to characterize and analyze the obtained PANI/D-CMC/ZnO material. Furthermore, as a suitable for determining hydrogen peroxide (H₂O₂), a high conductivity platform based on PANI/D-CMC/ZnO electrode modified nanocomposite was created. The modified PANI/D-CMC/ZnO, electrode indicated a good linear range and a low detection limit (LOD) of 0.45 M for hydrogen peroxide determination under optimal conditions (pH 5.7). The peak current of differential pulse voltammetry (DPV) method of hydrogen peroxide increased linearly with its concentration. The concentration has been linear from in the ranges of 0.50 to 5 μM and 10 to 50 μM. The sensor was successfully used to test for hydrogen peroxide in real samples like milk.