石墨烯-ITO复合电极对聚苯胺薄膜电致变色性质的影响

发布时间：2018-02-13 09:19

本文关键词： 电致变色聚苯胺石墨烯复合电极电化学聚合　出处：《高等学校化学学报》2017年04期 　论文类型：期刊论文

【摘要】：采用改进的Hummers法制备氧化石墨烯(GO),首先,石墨与浓硫酸、过硫酸钾和五氧化二磷反应制得强氧化产物,随后将其与浓硫酸、硝酸钠、高锰酸钾反应,经双氧水发泡、酸洗、超声等合成氧化石墨烯水溶液,再通过金属箔还原和基底转移过程制备GO-氧化铟锡(ITO)复合电极材料.通过金属箔还原和基底转移过程制备GO-氧化铟锡(ITO)复合电极材料.利用电化学聚合法在GO-ITO复合电极上制备聚苯胺(PANI)薄膜,并对其形貌结构、电化学及电致变色性质进行表征.结果表明,与ITO电极相比,采用GO-ITO复合电极制备的PANI的成膜性得到明显改善,复合电极具有更加均匀细致的颗粒表面,增大了聚合物与电解液之间的接触面积,为电致变色过程中平衡离子的注入/脱出提供了更多的通道,因而PANI薄膜在700nm处的光学对比度提高了约13%,响应速度缩短了约2.6 s,着色效率高达169.6 cm2/C.GO的引入保持了PANI良好的电化学稳定性.GO-ITO复合电极有效改善了聚合物的综合性能,对于聚合物电致变色材料及器件的开发具有潜在的应用前景.
[Abstract]:Graphene oxide was prepared by improved Hummers method. Firstly, graphite reacted with concentrated sulfuric acid, potassium persulfate and phosphorus pentoxide to produce a strong oxidation product. Then it reacted with concentrated sulfuric acid, sodium nitrate and potassium permanganate, and was foamed with hydrogen peroxide. Ultrasonic synthesis of graphene oxide aqueous solution, The composite electrode materials were prepared by metal foil reduction and substrate transfer process. The composite electrode materials were prepared by metal foil reduction and substrate transfer. The composite electrode materials were prepared by electrochemical polymerization in GO-ITO. Polyaniline (pani) thin films were prepared on the composite electrode. The morphology, structure, electrochemical and electrochromic properties of PANI were characterized. The results showed that compared with ITO electrode, the film-forming property of PANI prepared by GO-ITO composite electrode was obviously improved, and the composite electrode had more uniform particle surface. The contact area between polymer and electrolyte is increased, which provides more channels for the implantation / removal of equilibrium ions in electrochromic process. As a result, the optical contrast of PANI thin films at 700nm is increased by about 13x, the response speed is shortened by about 2.6s, and the coloring efficiency up to 169.6 cm2/C.GO keeps the good electrochemical stability of PANI. GO-ITO composite electrode can effectively improve the comprehensive properties of the polymer. It has a potential application prospect for the development of polymer electrochromic materials and devices.
【作者单位】：浙江工业大学化学工程学院;
【基金】：国家自然科学基金(批准号:51673174,51573165) 浙江省自然科学基金(批准号:LY15E030006) 浙江工业大学校基金重点项目(批准号:1401101002408)资助~~
【分类号】：O631.23;TB383.2

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