| Summary: | 碩士 === 國立雲林科技大學 === 材料科技研究所 === 103 === In this study, a non-enzyme hydrogen peroxide and glucose biosensor were fabricated based on Pt and MoS2 nanoparticles on graphene (Pt-MoS2/Gr). The Pt- MoS2/graphene composites was formed from graphite by modified Hummers and Offman′s method , hydrothermal synthesis and reflux synthesis method.
The graphene oxide (GO) sheets were synthesized by modified Hummers and Offman′s method. The MoS2/grephene is to obtain by the hydrothermal method by mixing GO, sodium molybdate (Na2MoO4．2H2O) , and cysteine ammonium acid (L-cysteine). The Pt-MoS2/grephene is to obtain by the reflux synthesis method by
mixing MoS2/grephene powder , chloroplatinic acid and ethylene glycol.
Obtained Pt-MoS2/graphene composites were characterized by X-ray diffraction analysis (XRD) , scanning electron microscopy (SEM) , energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM) , and confirmed that the characteristic peak ,material morphology ,chemical elements and distribution.
The results show that the Pt-MoS2/graphene composites modified glass carbon electrode (GCE) shows a high sensitivity reach 1430μAmM-1cm-2, 287μAmM-1cm-2 and low detection limit reach 0.01μM for hydrogen peroxide and glucose detection.
Finally the Pt-MoS2/graphene composites also exhibit superior electrochemically active surface area (ECSA) reach 203 m2/g. This reveal that the Pt-MoS2/graphene can be used as promising electrocatalyst supports for eletrochemical sensors and biosensors.
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