Abstract
To utilize the maximum activity of nanomaterials, it was specifically synthesized by appropriate physicochemical properties. In that aspect, we have described the synthesis of porous MnCo2O4 by simple chemical route and applied for the selective detection of cadmium (Cd (II)). The as-prepared porous MnCo2O4 was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) adsorption isotherm, X-ray diffraction pattern analysis (XRD), Fourier transform infra-red spectroscopy (FT-IR), energy dispersive X-ray (EDX) and electrochemical techniques. The porous MnCo2O4 exhibited an excellent electrochemical behaviour and good analytical response towards the determination of Cd (II). Those analytical factors such as pH, deposition potential and deposition time are optimized by using differential pulse anodic stripping voltammetry (DPASV). A wide linear concentration range from 2.3 to 120 µg L−1, limit of detection (LOD) of 0.72 µg L−1 and the limit of quantification (LOQ) of 0.91 µg L−1 were achieved for determination of Cd (II). The selectivity of the developed sensor was explored in the presence of co-interfering ions. Also our sensor exhibits a good stability, reproducibility and repeatability. In addition, the practicability of proposed sensor was evaluated for the detection of Cd (II) in real water samples.
Highlights
Discharge of toxic heavy metal ions to the environment causes most harmful issues to the human and ecosystem
We have demonstrated the synthesis of porous MnCo2O4 by simple chemical route at the low processing temperature
The crystallinity of as-prepared MnCo2O4 was confirmed by X-ray diffraction (XRD) analysis
Summary
Discharge of toxic heavy metal ions to the environment causes most harmful issues to the human and ecosystem. The electrochemical methods have been accepted for the detection of heavy metal ions because of their excellent sensitivity, rapid analysis and low cost[18, 19]. Preparation of porous MnCo2O4 and electrochemical detection of Cd2+. MnCo2O4 exhibited high sensitivity, excellent selectivity, wide linear concentration range and acceptable storage stability for the determination of Cd (II).
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