Preparation of Poly(3,4-ethylenedioxythiophene)/Graphene/Nickel Particles Hybrid Materials and its Applications in Electrochemical Sensors and Transparent Conductive Films
| Autor: | KUO, CHE-WEI, 郭哲瑋 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 Graphene-based hybrid materials were prepared through a nickel macrocyclic complex reacted with graphene oxide. The reaction can effectively guiding the metal complex distributed uniformly on the surface of graphene. After a high temperature sintering, nanoscale nickels were supported on the surface of graphene, and also distributed between the spacing of multilayers graphene-based nanocomposites. The conductivity of these graphene-based nanocomposites were studied. The surface morphology of the GO/Ni hybrid materials were characterized by SEM and TEM. Observation under higher temperature revealed that Nickel particles were formed on GO sheets. XPS analysis was performed to further understand the chemical composition of the as-prepared GO/Ni hybrid materials. According to previous studies, carbohydrates can be oxidized. In this work, the Ni(III)/(II) species on the electrode surface acts as a catalyst for the oxidation of glucose. The glucose sensor exhibited a linear range from 0.4 mM to 3.0 mM and a detection limit of 4.95 uM and sentivity of 347.04 uA/mM/cm2. Furthermore, a series of poly(3,4-ethylenedioxythiophene)/graphene-based nanocomposites were prepared by incorporation of 3,4-ethelene-dioxythiophene monomer and the as-prepared graphene/macrocyclic nickel complex hybrid materials through an in situ emulsion polymerization. Here, we tried to apply these materials for electrochemical sensors because the expecting properties such as increase the electrocatalytical effects in reversibility and electro-activity. It is well known that PEDOT is capable of oxidizing ascorbic acid upon the addition of AA to the phosphate buffered saline (PBS buffer) solution. As a result, the sensing current of PEDOT/GO/Ni composite materials increases approximate 51.3%. Using PEDOT/GO/Ni composites formulated as a liquid, coating on a PET, measured resistance and transmittance. The results showed that the higher sintered temperature of GO/Ni hybrid materials will enhance the conductivity. In contrast, decrease the transmittance of coating films. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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