Development and Characterization of Nano-Ink from Silicon Carbide/Multi-Walled Carbon Nanotubes/Synthesized Silver Nanoparticles for Non-Enzymatic Paraoxon Residuals Detection

• Published in: Micromachines (Basel) 2023-08, Vol.14 (8), p.1613
• Main Authors: Chuasontia, Itsarapong, Sirisom, Wichaya, Nakpathomkun, Natthapon, Toommee, Surachet, Pechyen, Chiravoot, Tangnorawich, Benchamaporn, Parcharoen, Yardnapar
• Format: Article
• Language: English
• Subjects: Agriculture; Carbon; Catalytic oxidation; Chemical sensors; Chitosan; Chromatography; Electric properties; Electrodes; Enzymes; Field emission microscopy; Field emission spectroscopy; Mass spectrometry; Molecular weight; Multi wall carbon nanotubes; Nanomaterials; Nanoparticles; non-enzymatic electrochemical sensor; paraoxon; pesticide sensor; Pesticides; Potassium; Printing-ink; Quality management; Raman spectroscopy; Scientific imaging; Sensors; Silicon; Silicon carbide; Silver; silver nanoparticle; Synthesis; Toxicity; Voltammetry; X ray powder diffraction
• ISSN: 2072-666X; 2072-666X
• DOI: 10.3390/mi14081613

The ongoing advancement in the synthesis of new nanomaterials has accelerated the rapid development of non-enzymatic pesticide sensors based on electrochemical platforms. This study aims to develop and characterize Nano-ink for applying organophosphorus pesticides using paraoxon residue detection. Multi-walled carbon nanotubes, silicon carbide, and silver nanoparticles were used to create Nano-ink using a green synthesis process in 1:1:0, 1:1:0.5, and 1:1:1 ratios, respectively. These composites were combined with chitosan of varying molecular weights, which served as a stabilizing glue to keep the Nano-ink employed in a functioning electrode stable. By using X-ray powder diffraction, Raman spectroscopy, energy dispersive X-ray spectroscopy, and a field emission scanning electron microscope, researchers were able to examine the crystallinity, element composition, and surface morphology of Nano-ink. The performance of the proposed imprinted working electrode Nano-ink was investigated using cyclic voltammetry and differential pulse voltammetry techniques. The Cyclic voltammogram of Ag NPs/chitosan (medium, 50 mg) illustrated high current responses and favorable conditions of the Nano-ink modified electrode. Under the optimized conditions, the reduction currents of paraoxon using the DPV techniques demonstrated a linear reaction ranging between 0.001 and 1.0 µg/mL (R2 = 0.9959) with a limit of detection of 0.0038 µg/mL and a limit of quantitation of 0.011 µg/mL. It was concluded that the fabricated Nano-ink showed good electrochemical activity for non-enzymatic paraoxon sensing.