Journal
ADVANCED MATERIALS INTERFACES
Volume 8, Issue 14, Pages -Publisher
WILEY
DOI: 10.1002/admi.202100586
Keywords
composites; electrochemical sensing; graphene oxide; metal-organic frameworks
Funding
- National Natural Science Foundation of China [21971184]
- Collaborative Innovation Center of Suzhou Nano Science and Technology - Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project
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The study presents a highly sensitive electrochemical platform based on composites of graphene oxide (GO) and conductive YbHHTP metal-organic framework for detecting dopamine (DA) and uric acid (UA). The in situ integration strategy results in enhanced conductivity and fast electrochemical kinetics in the composites, leading to ultrahigh sensitivity in detection of DA and UA.
The rational selection and integration of materials play important roles in advancing electrochemical sensing. Herein, a highly sensitive electrochemical platform based on composites of graphene oxide (GO) and conductive YbHHTP metal-organic framework (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) for the detection of dopamine (DA) and uric acid (UA) is reported. The composites are prepared by the introduction of GO into the hydrothermal synthesis of YbHHTP. The morphology, structure, and property of the resultant GO/YbHHTP composites are characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, ultraviolet-visible spectroscopy, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and cycle voltammetry. The results show that this in situ integration strategy facilitates the homogeneous anchoring of YbHHTP nanorods on the surface of GO sheets to achieve a considerable conductivity in the composites and fast electrochemical kinetics for probe molecules. As a result, the GO(2.0)/YbHHTP-modified electrodes exhibit ultrahigh sensitivity in detection of DA (3.62 mu A mu M-1) and UA (1.97 mu A mu M-1) as well as excellent reproducibility, stability, and anti-interfere ability.
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