Fabrication of Polyvinyl Alcohol Doped CuO Thin Films for Improved Amperometric-Non Enzymatic Hydrogen Peroxide Sensing

Navashree Nagarajan
CMR Institute of Technology, Bengaluru, India

Parthasarathy Panchatcharam (Login required)
CMR Institute of Technology, Bengaluru, India


Paper #7782 received 24 Feb 2023; revised manuscript received 28 Jun 2023; accepted for publication 8 Jul 2023; published online 23 Aug 2023.

Abstract

Nanotechnology is an emerging field in science and technology that primarily focus on nanoparticles ranging from 1–100 nm in diameter, which exhibit distinctive properties owing to their small size and large surface area. Among them, copper oxide nanostructures, are major metal oxide nanoparticles, widely used in various fields especially in the development of biosensors due to their unique structural characteristics and biological effects. In this work, copper oxide nanoparticles were synthesized using a simple chemical reduction method and characterized using XRD to study the morphological and structural properties. Those nanoparticles were doped with PVA by sol-gel process and the electrode was fabricated using the spin coating technique on the precleaned glass slide. CV studies showed that the CuO NPs electrode was effective in detecting hydrogen peroxide with high selectivity even in the presence of other substances. A high-level sensitivity of 0.002 mA∙mM−1cm−2 and a 0.5 mM to 1.5 mM quick linear response was accomplished due to the large specific surface areas and efficient electron transport in the corresponding reactions, making this electrode a very promising candidate for efficient and accurate non-enzymatic detection of hydrogen peroxide (H2O2).

Keywords

copper oxide nanoparticles; hydrogen peroxide; polyvinyl alcohol; electrochemical sensor; amperometric detection

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References


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