Study on Pt-MoSX/Graphene Composites For Electrochemical Sensor

• Main Authors: Ping-Chien Hsu, 許秉虔
• Other Authors: Wen-Jauh Chen
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/59443043002575458006

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.