Integrated nanozyme electrochemical sensor for the detection of tannic acid: An advanced approach to rapid and efficient environmental monitoring
APPLIED SURFACE SCIENCE ADVANCES, cilt.21, 2024 (ESCI)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 21
- Basım Tarihi: 2024
- Doi Numarası: 10.1016/j.apsadv.2024.100602
- Dergi Adı: APPLIED SURFACE SCIENCE ADVANCES
- Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI)
- Anahtar Kelimeler: Electrochemical sensor, Microfabrication, Nanozyme, Tannic acid, Water samples
- Ankara Üniversitesi Adresli: Evet
Özet
This study presents a novel methodology for the rapid on-site detection of tannic acid (TA), a prevalent organic contaminant in various natural environments, notably in plant-derived sources. The proposed approach involves the development of a compact integrated electrochemical sensor incorporating a nanozyme system. Specifically, this system comprises Fe2O3 nanoparticles (NPs) embedded within a chitosan (CS) matrix, immobilized onto a sulfur-doped graphene (S-Gr) substrate deposited on a gold electrode (AuE). The Fe2O3NPs exhibit peroxidaselike artificial enzyme activity, contributing to exceptional stability and catalytic efficiency in TA oxidation processes. Additionally, the CS matrix acts as a stabilizing agent, enhancing the performance and recyclability of the nanozyme. Furthermore, the S-Gr nanomaterial facilitates rapid electron transfer, leading to heightened sensitivity and prompt response times. The integration of these advanced nanomaterials with a microfabricated electrode presents an economically feasible, reliable, and effective solution for TA detection, with promising prospects for large-scale deployment and environmental monitoring. The Fe2O3-CS-S-Gr/AuE sensing system demonstrates a calculated limit of detection (LOD) of 3.6 x 10-3 mu M and an increased sensitivity of 0.2 mu Ax mu M-1, with a wide linear concentration range spanning from 0.01 to 1000 mu M for TA detection. Notably, the recovery values obtained for surface water samples fall within the range of 97.7 % to 99.5 %, indicating strong agreement with results derived from the standard method, UHPLC-MS/MS.