An electrochemical sensor for cadmium ion detection that is based on an AuNP-functionalized metal–organic framework-graphene nanocomposite

A Zn metal–organic framework (MOF5) was synthesized successfully by using a simple hydrothermal method. A carbon paste (CP) electrode was modified by utilizing a gold nanoparticle-functionalized MOF5/graphene layer (AuNP@Gr/MOF5 nanocomposite). The AuNP@Gr/MOF5 layer was characterized using FTIR, SE...

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Bibliographic Details
Published in:Journal of materials research 2022-12, Vol.37 (23), p.4368-4380
Main Authors: Ganash, Aisha A., Alotaibi, Maliha M.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Chemical sensors
Chemistry and Materials Science
Electrodes
Gold
Graphene
Inorganic Chemistry
Ion detectors
Materials Engineering
Materials research
Materials Science
Metal-organic frameworks
Nanocomposites
Nanoparticles
Nanotechnology
Selectivity
Wastewater
Water sampling
Zinc
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Summary:A Zn metal–organic framework (MOF5) was synthesized successfully by using a simple hydrothermal method. A carbon paste (CP) electrode was modified by utilizing a gold nanoparticle-functionalized MOF5/graphene layer (AuNP@Gr/MOF5 nanocomposite). The AuNP@Gr/MOF5 layer was characterized using FTIR, SEM, EDX, TEM, and XRD. The AuNP@Gr/MOF5 nanocomposite-modified electrode was used for the determination of Cd +2 ions in 0.1 M acetate buffer at pH 4.5 using the SWV technique. The developed sensor exhibited linear behavior in the concentration range of 0.01–30 μM with a limit of detection of 0.005 μM. A good recovery percentage of 88–102% was achieved in real wastewater samples. The developed sensor showed high selectivity, reducibility, and stability. Graphical abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-022-00808-7