Abstract

Iron oxide (β-FeOOH) nanoparticles were prepared by a simple precipitation method assisted by ultrasound at room temperature. Formation of phase pure β-FeOOH material was confirmed through the Reitveld refined XRD and FTIR analysis. The β-FeOOH nanoparticles prepared was found to have a narrow size distribution range with an average particle size of 138 nm. The optical band gap of the material was found to be 2.6 eV. The electrochemical performance of β-FeOOH was studied in a three electrode system using β-FeOOH coated on graphite sheet as the working electrode. The Ag/AgCl and platinum was used as the reference and counter electrodes, respectively. The KOH in distilled water was used as the aqueous electrolyte. The specific capacitance of the above material at a high current density of 1 A/g for 1 M, 3 M and 5 M aqueous KOH electrolyte was found to be 68.66, 138.67 and 88.17 F/g, respectively.

摘要

氧化铁 (β-FeOOH) 纳米粒子是在室温下通过超声波辅助的简单沉淀法制备的。通过 Reitveld 精制 XRD 和 FTIR 分析证实了相纯 β-FeOOH 材料的形成。发现制备的 β-FeOOH 纳米粒子具有窄的尺寸分布范围，平均粒径为 138 nm。发现该材料的光学带隙为 2.6 eV。以石墨片上包覆的β-FeOOH为工作电极，在三电极体系中研究了β-FeOOH的电化学性能。Ag/AgCl 和铂分别用作参比电极和反电极。蒸馏水中的 KOH 用作水性电解质。上述材料在1A/g高电流密度下1M的比电容，