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      https://www.ias.ac.in/article/fulltext/jcsc/132/0068

    • Keywords

       

      Electrocatalysis; copper oxide nanoparticles; amperometry; hydrogen peroxide; bleach cream; bentonite; electrochemical sensor.

    • Abstract

       

      An electrochemical sensor for hydrogen peroxide (H2O2) present in face bleach cream is fabricated using a composite based on bentonite (Bt) clay and copper oxide (CuO) nanoparticles (CuO-Bt). The CuO nanoparticles’ immobilization into Bt was carried out by a two-step process in which Cu2+ is ionexchangedinto Bt layers (Cu2+-Bt) in the first step followed by the chemical reaction of NaOH with Cu2+-Bt in the second step to get the target material, CuO nanoparticles immobilized Bt (CuO-Bt). The successful immobilization of CuO nanoparticles into Bt is investigated by a variety of techniques like scanning electron microscopy, transmission electron microscopy, FT-IR spectroscopy, UV-Vis spectroscopy, and electrochemical methods. The CuO-Bt composite is coated on a glassy carbon electrode and used as a selective electrochemical sensing platform for the determination of H2O2 based on the significant electrocatalyticproperty of CuO-Bt towards the H2O2 oxidation. This amperometric electrochemical sensor shows two linear detection ranges (5–50 lM and 50–10000 lM) with a limit of detection of 4.9 lM. The sensitivity is calculated to be 0.06 mA mM-1 cm-2. This electrochemical sensor exhibits high selectivity, stability, and practical applicability for the H2O2 determination in real samples.

    • Author Affiliations

       

      DHARMENDRA KUMAR YADAV1 VELLAICHAMY GANESAN1 RUPALI GUPTA1 MAMTA YADAV1 PIYUSH KUMAR SONKAR1 PANKAJ KUMAR RASTOGI2

      1. Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005, India
      2. Department of Chemistry, GLA University, Mathura, Uttar Pradesh 284 401, India
    • Dates

       
  • Journal of Chemical Sciences | News

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