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<p>Developing high-performance supercapacitors (SCs) with low-cost, bio-waste derived electrode materials that possess high specific capacitance (C<sub>sp</sub>) with maintaining high Energy density (E<sub>d</sub>) is highly desirable and remains a major challenge. Herein, we report an Boron, Sulphur doped carbon quantum dots (zero-dimensional nanomaterial (B, S-CQDs)) from the bark of Eucalyptus via hydrothermal method due to excellent electrochemical properties of CQDs. Herein, both experimental and theoretical findings, show that the heteroatom doping successfully promotes the C<sub>sp</sub> compared to undoped CQDs. As a consequence, the B, S-CQDs demonstrate a high C<sub>sp</sub> of 405.6&#xa0;F g<sup>− 1</sup> at 0.01 Vs<sup>− 1</sup> and 185.6&#xa0;F g<sup>− 1</sup> at 0.05 Vs<sup>− 1</sup>, revealing excellent electrochemical performance. Along with the B, S-CQDs derived electrode demonstrates superb coulombic efficiency with only 0.9% efficiency loss after 4000 cycles. Furthermore, the B, S-CQDs with an excellent pores distribution (BET technique). Additionally, B,S-CQDs exhibited excellent antioxidant properties in terms of 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. This work creates a new pathway to develop carbon-based electrode candidates for SCs with outstanding performance.</p>

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Eco-Friendly Synthesis of B, S-Doped Carbon Quantum Dots with Synergistic Electrochemical and Antioxidant Properties

  • 期刊论文

  • 发表日期：

    2026年5月14日

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  • Suman Suman,
  • Gita Rani,
  • Sunil Kumar,
  • Siddharth Siddharth,
  • Sanchit kumar

摘要

Developing high-performance supercapacitors (SCs) with low-cost, bio-waste derived electrode materials that possess high specific capacitance (Csp) with maintaining high Energy density (Ed) is highly desirable and remains a major challenge. Herein, we report an Boron, Sulphur doped carbon quantum dots (zero-dimensional nanomaterial (B, S-CQDs)) from the bark of Eucalyptus via hydrothermal method due to excellent electrochemical properties of CQDs. Herein, both experimental and theoretical findings, show that the heteroatom doping successfully promotes the Csp compared to undoped CQDs. As a consequence, the B, S-CQDs demonstrate a high Csp of 405.6 F g− 1 at 0.01 Vs− 1 and 185.6 F g− 1 at 0.05 Vs− 1, revealing excellent electrochemical performance. Along with the B, S-CQDs derived electrode demonstrates superb coulombic efficiency with only 0.9% efficiency loss after 4000 cycles. Furthermore, the B, S-CQDs with an excellent pores distribution (BET technique). Additionally, B,S-CQDs exhibited excellent antioxidant properties in terms of 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. This work creates a new pathway to develop carbon-based electrode candidates for SCs with outstanding performance.