Electrosynthesis of coNi and FeNi LDHs and studying the effect of intercalated cobalt and iron on the electrocatalysis and determination of glucose in human salivary samples

IF 2.5 Q2 CHEMISTRY, MULTIDISCIPLINARY

Results in Chemistry Pub Date : 2025-01-23 DOI:10.1016/j.rechem.2025.102067

Fatemeh Masoumi, Rahim Mohammad-Rezaei, Mahdi Golmohammadpour

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Abstract

In this research, two different types of layered double hydroxides (LDHs) based on FeNi and CoNi were electrosynthesized on the surface of carbon ceramic electrode (CCE) as a renewable and polishable substrate and their electrocatalytic response for the detection of glucose in saliva samples were studied. Active surface area and electron transfer performance of CCE/Co-Ni-LDH and CCE/Fe-Ni-LDH were investigated in detail revealing that cobalt is more efficient than iron for intercalation in the LDH structure for electrocatalytic purposes. Based on experimental studies using the chronoamperometry method in the optimized condition, the detection limit, linear range, and sensitivity of the prepared CCE/Co-Ni-LDH for the glucose measurement were found to be 0.104 μM, 0.5–33 μM, and 6.4890 μA μM⁻¹ cm⁻² respectively, which were remarkably better than CCE/Fe-Ni-LDH. The fastness of the preparation process, renewable surface, and improved analytical performance enabled CCE/Co-Ni-LDH to be a practical sensor for glucose detection in human saliva samples with satisfactory results.

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