Abstract
An innovative electrochemical sensor was developed based on the modification of a glassy carbon electrode (GCE) surface with graphene oxide aerogel (GA) wrapped copper centred metal-organic framework (Cu-MOF) and was applied to the detection of trace catechol (CT). The morphology, structure of GA/Cu-MOF and electrochemical properties of GA/Cu-MOF/GCE were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical techniques, respectively. GA/Cu-MOF/GCE has a wide linear range of 12.5—900 μmol∙L -1 ( R 2 =0.997) and a low limit of detection of 1.49 μmol∙L -1 . Compared with the unmodified GCE, GA/Cu-MOF/GCE shows better stability, greater sensitivity and higher repeatability. In addition, the analytical performance of the sensor for the detection of CT had been assessed in actual water samples with satisfying results.
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