Abstract
In this work, a Fe3O4/graphene oxide (GO)/pristine graphene (PG) ternary composite was synthesized successfully by a two-step method: first graphite was added into GO dispersion to get the GO/PG composite, followed by loading Fe3O4 nanoparticles via a co-precipitation method. The structure of Fe3O4/GO/PG was characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Compared with the Fe3O4/GO binary composite, Fe3O4/GO/PG composite shows more excellent properties. An electrochemical sensor fabricated with Fe3O4/GO/PG was used to detect dopamine (DA). The linear detection ranges of DA is 5-50 μM with detection limits of 3.37 μM.
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