Journal
MICROCHIMICA ACTA
Volume 189, Issue 4, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-022-05222-8
Keywords
Ti3C2; UIO-66-NH2; Doped membrane; Electrochemical sensors; Differential pulse voltammetry; Dopamine
Categories
Funding
- Guangxi Science and Technology Department [2018AD19154, 2021AC20002]
- Foundation of Guilin University of Technology, Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, and College Students' Innovative Entrepreneurial Training Plan Program [202010596028, 202110596531]
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A Ti3C2 membrane was prepared by doping UIO-66-NH2 with Ti3C2 through hydrogen bonds. The fabricated Ti3C2 membrane/GCE sensor exhibited excellent electrochemical performance and mechanical properties. The sensor showed high sensitivity for dopamine detection with high selectivity and stability.
A Ti3C2 membrane was prepared by doping UIO-66-NH2 with Ti3C2 through hydrogen bonds. When the doping mass ratio of Ti3C2 and UIO-66-NH2 was 6:1, the electrochemical performance was optimal. Characterization was done by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS) which exhibited hierarchical cave-like physiognomy, large specific area, outstanding electronic conductive network, and excellent film-forming property. Moreover, the Ti3C2 film was analyzed via atomic force microscopy (AFM), which displayed good mechanical properties and rough surface morphology. The fabricated Ti3C2 membrane/GCE sensor was applied to the detection of dopamine (working potential of + 0.264 V vs. Ag/AgCl) with LOD of 0.81 fM and a sensitivity of 14.72 mu A fM(-1) cm(-2). It was demonstrated that the Ti3C2 membrane can be used to construct nonenzymatic sensors with excellent performance. The fabricated sensor has high selectivity and stability and has good practicability with recoveries of 101.2-103.5% and a relative standard deviation (RSD) of 1.2-2.4%.
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