Synthesis And Electrochemical Biosensor Applications Of Molybdenum Disulfide

Molybdenum disulfide(MoS2)attracted increasing attentions for the synthesis and applications of functional hybrid nanomaterials.Firstly,in this thesis,we have successfully prepared molybdenum disulfide nanosheets which have a uniform structure by ultrasonic stripping method;then,we used the two-step hydrothermal method to fabricate the organic copper(OCu)nanowires formed by the reaction of copper acetate and o-phenetidine.Then MoS2 nanosheets were compounded into the system to form MoS2-OCu composites.Second,we analyzed the morphology of the products by SEM,TEM and AFM.At the same time,XRD,XPS and FTIR were used to analyze the structure of the products.Then,we used MoS2 nanosheets and molybdenum MoS2-OCu composites to prepare nonenzyme hydrogen peroxide(H2O2)sensors and nonenzyme ascorbic acid(AA)sensors respectively.Corresponding electrochemical tests and analysis studies were conducted.The H2O2 sensor made of MoS2 nanosheets has a linear range of 0.95 to 33.9 mM and a detection limit of 0.85 μm.The linear range of MoS2-OCu composites H2O2 sensor was 0.085-38.OmM,and the detection limit was 0.077μm.The AA sensor prepared from the MoS2 nanosheets has a linear range of 0.585 to 10.6 mM and a detection limit of 0.21 μm.The linear range of the MoS2-OCu AA sensor wass 0.015～11.75 mM,and the detection limit was 0.022 μm,and these sensors also have good anti-interference and long-term stability.