一步法制备氧化石墨烯/聚苯胺/Au复合材料及电化学性能

One-step preparation of graphene oxide/polyaniline/Au composites and electrochemical properties

以改进的Hummers法制备的氧化石墨烯为基底,以氯金酸为氧化剂和金源,原位聚合苯胺单体,一步制得氧化石墨烯/聚苯胺/金(GO/PANI/Au)三元复合材料。形貌和成分分析结果表明,氯金酸成功地将苯胺氧化成聚苯胺,并被还原生成金纳米颗粒。电化学性能测试结果表明,随着氧化剂用量的增加,三元复合材料的比电容呈现先增大后减小的趋势,当氧化剂加入量为0.03mmol时,所制备的三元复合材料比电容最大,在1A/g电流密度、1mol/L H2SO4电解液中比容量达327F/g,在15A/g电流密度下容量保持率也高达81%。

The graphene oxide/polyaniline/gold (GO/PANI/Au) ternary composites were prepared successfully by one step method. The graphene oxide prepared by the modified Hummers method was used as the substrate, and the aniline monomer was polymerized in situ by using chloroauric acid as the oxidant and the gold source. The morphology and composition analysis showed that chloroauric acid successfully oxidized aniline to polyaniline and was reduced to gold nanoparticles. The electrochemical performance test showed that the specific capacitance of the ternary composites increased first and then decreased with the increase of the amount of oxidant. When the oxidant was added in an amount of 0.03 mmol, the prepared ternary composite had the largest specific capacitance. The specific capacity is 327 F/g at a current density of 1 A/g in 1 mol/L H 2SO 4 electrolyte. When the current density reached at 15 A/g, the capacity retention rate was still as high as 81% compared with initial current density.