Synthesis and Characterization of Konjac Gum/Polyethylene Glycol-Silver Nanoparticles and their Potential Application as a Colorimetric Sensor for Hydrogen Peroxide

Green and low-cost synthesis strategies for ultrasonic preparation of polymer blend matrix-based silver nanoparticles (Ag NPs) and the development of rapid and highly sensitive detection routes have a great attention in optical sensor applications. In this study, we investigated the hydrogen peroxide detection performance of Konjac gum/polyethylene glycol—silver nanoparticles (KG/PEG-Ag NPs). The KG/PEG-Ag NPs were synthesized via an ultrasonic process and characterized by different techniques, such as ultraviolet–visible spectroscopy (UV–Vis), Fourier-Transform Infrared spectroscopy (FT-IR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray spectroscopy (EDX), Transmission Electron Microscope (TEM), and The Xray Photoelectron Spectroscopy (XPS). Furthermore, we determined the experimental optimization on the effect of the rheological parameters of nanostructure with the highest correlation constant (R 2 :0.989–0.996), and the intrinsic viscosity (14.71–26.77 dl/g). To provide the miscible polymer blends and homogeneous dispersion of the nanostructure, we compared the rheological parameters with the experimental results. The response time was less than 5 s and the lower limit of detection was 0.071 μM. This novel, highly sensitive, rapid, and naked-eye colorimetric biosensor based-Ag NPs, which are prepared using an ultrasonic manufacturing approach, opens up a green approach of development facile detection of hydrogen peroxide in practical biomedical applications.