Scholarlink

<p>This research reported the synthesis of copper-doped zinc oxide/ carbon quantum dots (Cu-doped ZnO/CQD) nanoparticles. The chemical precipitation method was employed to prepare the nanoparticles. The role of CQD on the structural, optical, and luminescent properties of the Cu-doped ZnO is investigated. The crystallite size, strain, lattice constants and bond length are examined. The incorporation of CQD enhances the refractive index of the prepared material and reduces the optical band gap of Cu-doped ZnO. The electrochemical investigations are carried out in a three-electrode system. Impressively, the capacitive contribution increases up to 88% for Cu-doped ZnO/CQD, which was higher than the capacitive contribution of Cu-doped ZnO-based electrode. The specific capacitance of 241.6&#xa0;F/g at a scan rate of 5 mV/s and 180.4&#xa0;F/g at a current density of 0.5&#xa0;A/g were observed. The results highlight the effective synthesis of the Cu-doped ZnO/CQD nanoparticles and their excellent electrochemical properties as a promising electrode candidate for ultracapacitor applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Influence of carbon quantum dots on enhanced capacitive behavior of Cu-doped zinc oxide nanoparticles as electrode in ultracapacitor

  • 期刊论文

  • 发表日期：

    2025年12月2日

查看全文
  • L. Bruno Chandrasekar,
  • V. Sumathi,
  • D. Ramya,
  • A. Jahir Husain,
  • S. A. Yuvaraj,
  • N. Shankar,
  • M. Karunakaran,
  • P. Shunmuga Sundaram,
  • Sonaimuthu Mohandoss,
  • J. Thirumalai

摘要

This research reported the synthesis of copper-doped zinc oxide/ carbon quantum dots (Cu-doped ZnO/CQD) nanoparticles. The chemical precipitation method was employed to prepare the nanoparticles. The role of CQD on the structural, optical, and luminescent properties of the Cu-doped ZnO is investigated. The crystallite size, strain, lattice constants and bond length are examined. The incorporation of CQD enhances the refractive index of the prepared material and reduces the optical band gap of Cu-doped ZnO. The electrochemical investigations are carried out in a three-electrode system. Impressively, the capacitive contribution increases up to 88% for Cu-doped ZnO/CQD, which was higher than the capacitive contribution of Cu-doped ZnO-based electrode. The specific capacitance of 241.6 F/g at a scan rate of 5 mV/s and 180.4 F/g at a current density of 0.5 A/g were observed. The results highlight the effective synthesis of the Cu-doped ZnO/CQD nanoparticles and their excellent electrochemical properties as a promising electrode candidate for ultracapacitor applications.