Electrochemical detection of dopamine through hydrothermally prepared lanthanum metal-organic framework (La-BTC)/carbon nanotube nanohybrid

被引：13
作者：
Rajaitha, P. M. [1 ]
Hajra, Sugato [1 ]
Padhan, Aneeta Manjari [1 ]
Dubal, Deepak [2 ]
Kim, Hoe Joon [1 ,3 ]
机构：
[1] Daegu Gyeongbuk Inst Sci & Technol, Dept Robot & Mech Engn, Daegu 42988, South Korea
[2] Queensland Univ Technol QUT, Ctr Mat Sci, Sch Chem & Phys, 2 George St, Brisbane 4000, Australia
[3] Daegu Gyeongbuk Inst Sci & Technol, Robot & Mech Res Ctr, Daegu 42988, South Korea
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2023年 / 296卷
基金：
新加坡国家研究基金会;
关键词：
Dopamine; Electrochemical sensor; Lanthanum; Metal-organic framework; SENSOR; ACID; REMOVAL; STABILITY; ARSENATE;
D O I：
10.1016/j.mseb.2023.116638
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Non-enzymatic dopamine detection utilizing electrochemical techniques is critical for a variety of reasons. For example, electrochemical sensing eliminates the need for costly and difficult enzymatic tests, which are frequently time-consuming and demand specialist equipment. It also detects dopamine in real time, making it perfect for in-vivo monitoring. Electrochemical detection might be extremely useful in diagnosing and treating illnesses like Parkinson's and other dopamine-related disorders. Overall, this approach is a robust tool for identifying and evaluating dopamine levels, with various potential therapeutic and research applications. The direct integration of lanthanum metal-organic framework (La-BTC) and carbon nanotube (CNT) hybrid onto an electrode for electrochemical sensing is demonstrated. La-BTC/CNT composite is batch fabricated using a hydrothermal technique. For structural analysis, the prepared La-BTC is examined using X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy in combination with energy dispersive X-ray spectroscopy (SEM/EDS), and X-ray photoelectron spectroscopy (XPS) to determine its crystalline nature, surface functionalities, graphitic nature, thermal stability, and surface composition. Electrochemical sensing of dopamine is investigated using the cyclic voltammogram (CV) and linear sweep voltammogram (LSV) responses. Compared to La-BTC, the La-BTC/CNT sample demonstrated good electrocatalytic activity towards dopamine. The LOD and LOQ are measured to be 0.073 & mu;M and 0.24 & mu;M, respectively. The calibrated sensitivity of the modified electrode is 2.953 & mu;A & mu;M- 1cm � 2. Several potential interferences, including glucose, potassium chloride, sodium hydroxide, and sulfuric acid, show a negligible impact. The modified La-BTC/CNT electrode exhibits good stability. The results indicate that La-BTC/CNT nanohybrids can be promising for non-enzymatic dopamine sensing.
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页数：9
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