Work

Effect of synthesis conditions on Rheodiscolor leaf-derived carbon quantum dots as electrolytes for energy storage applications

Year: 2025

Type: article

Abstract: Carbon Quantum Dots (CQDs) were synthesized from Rheodiscolor leaf extract using Soxhlet extraction followed by a hydrothermal process in four variants: S1 (raw CQDs), S2 (5 % ethanol-CQDs), S3, and S4. UV–Visible absorption bands at 211–339 nm and excitation-dependent photoluminescence (315–475 nm) confirmed moderate quantum confinement. FTIR spectra identified O–H (∼3400 cm⁻¹) and C O (∼1645 cm⁻¹) groups, with additional C–H and C C bands in S2–S4 enhancing solubility. Electrochemical characterization using GCD and cyclic voltammetry (CV) revealed contrasting outcomes: GCD showed reduced capacitance of GCE for all CQD variants compared to KOH, with S1 retaining 45–54 % and S4 only 20–38 %, whereas CV indicated strong, stable performance of GCE for CQDs (S1–S3) (∼80–88 % of KOH) and moderate retention for CQD (S4) (43–60 %). These findings suggest that Rheodiscolor leaf-derived CQDs, especially S1–S3, are promising, sustainable, and tunable electrolyte materials for energy storage applications, with properties strongly influenced by synthesis conditions.

Source: Next Materials

DOI: 10.1016/j.nxmate.2025.101500

Authors: B.K. Nagendraprasad, Rajagopal Shanmugasundaram, M. Chethan, Karthik Kumara, M. Sathish, S. Thiyagaraj

Institutions: Jain University, B.M.S. College of Engineering

Language: English

Topic: Carbon and Quantum Dots Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,280