Ultrasensitive detection of dopamine via electrochemical route on spindle-like α-Fe2O3 Mesocrystals/rGO modified GCE
Source abstract
Abstract
Abstract In this study, spindle-like α-Fe2O3 mesocrystals/reduced-graphene-oxide composites modified glassy carbon electrode (α-Fe2O3/rGO/GCE) is developed for ultrasensitive electrochemical detection of DA. Morphologies and crystal structures of this composite are characterized by SEM, TEM, XRD, Raman spectrum, and XPS, respectively. The electrochemical behavior of DA on these electrodes are investigated by CV and EIS. The electrochemical conditions are optimized systematically. As results, the oxidation current of DA on α-Fe2O3/rGO/GCE is 38.13-fold increase than that on bare GCE. It is ascribed to the high catalytic activity of α-Fe2O3 mesocrystals and large electrochemical active area of rGO. Under the best voltammetric condition, wide linear detection range (from 1.0×10−8 to 9.0×10-4 mol/L) and low LOD of 3.26 nM (S/N=3) are obtained on the α-Fe2O3/rGO/GCE. Furthermore, this electrode is also used for DA detection in real human serums samples successfully. This α-Fe2O3/rGO/GCE provides a good example in design of other mesocrystals-based composite materials for electrochemical detection.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrochemical sensors and biosensors · Advanced biosensing and bioanalysis techniques · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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