Aluminosilicate nanoparticles decorated by copper hexacyanoferrate as a good electrocatalyst for non-enzymatic hydrogen peroxide sensing

• Published in: Inorganic and nano-metal chemistry Vol. ahead-of-print; no. ahead-of-print; pp. 1 - 10
• Main Authors: Norouzi, Banafsheh, Ehsani Tilami, Salma, Ahghari, Mohammad Reza
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 30.12.2021
• Subjects: Aluminosilicate nanoparticles; CuHCF; electrocatalyst; hydrogen peroxide
• ISSN: 2470-1556; 2470-1564
• DOI: 10.1080/24701556.2021.2024231

In this work, porous amorphous aluminosilicates nanoparticles (PAS NPs) have been synthesized by the sol-gel method. The crystals particle sizes of PAS NPs were about 90 nm by SEM. Carbon paste modified PAS NPs/Cu (CPE/PAS NPs/Cu) was placed into a potassium hexacyanoferrate solution by continuous cycling of the potential for deposition of copper hexacyanoferrate (CuHCF) at the surface of CPE/PAS NPs/Cu. The cyclic voltammograms of CPE/PAS NPs/CuHCF show two pairs (Fe(CN) 6 3− /Fe(CN) 6 4− and Cu 2+ /Cu + ) of redox couples due to the system. The total surface coverage of immobilized CuHCF was calculated at about 1.65 × 10 −7  mol cm −2 . Finally, this modified electrode responded to the different concentrations of hydrogen peroxide. The linear range and limit of detection (LOD) were 0.8-1.8 × 10 2  μmol L −1 and 0.65 μmol L −1 , respectively. The fabrication of this electrode is easy and it is simple and low-cost. The stability, reproducibility, and repeatability of this modified electrode are acceptable.