Photocatalytic Degradation and Antioxidant Properties of Carbon Quantum Dots Derived from Leaves of Antigonon leptopus
- DOI
- 10.2991/978-94-6463-648-2_20How to use a DOI?
- Keywords
- Methylene Blue; Eosin Yellow; Carbon Quantum Dots; DPPH; Antigonon leptopus
- Abstract
The carbon quantum dots (CQDs) from Antigonon leptopus leaves in the present study was done using conventional microwave irradiation. The optical properties of the CQDs were characterized by UV-Vis spectroscopy, revealing distinct excitations at 266 nm and 320 nm. Fourier transform infrared spectroscopy (FTIR) analysis found surface functionalization on carbon core such as hydroxyl and carbonyl, contributing to the CQDs electron transfer capabilities. X-ray diffraction (XRD) analysis confirmed the common amorphous property, and photoluminescence spectroscopy showed multiple emission peaks, indicating complex optical behaviour. High-resolution transmission electron microscopy (HRTEM) revealed spherical CQDs with an average particle size of 3.3 nm. The in vitro antioxidant activity was evaluated using the DPPH assay, and calculated IC50 value is 20.23 µg mL−1. The photocatalytic degradation of methylene blue (MB) and eosin yellow (EY) dyes was assessed under visible light, with the CQDs achieving up to 74.87% degradation for MB and 79.8% for EY at optimal concentrations. Rate constants indicated efficient photocatalysis, with MB degrading faster than EY. The present study revealed potential of Antigonon leptopus-derived CQDs as effective photocatalysts for dye degradation and antioxidant applications.
- Copyright
- © 2025 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - K. Pallavi AU - B. Mallikarjuna AU - Abhinash Marukurti AU - R. Ramesh Raju AU - P. Vijaya Nirmala AU - N. Madhavi AU - N. Srinivasa Rao PY - 2025 DA - 2025/02/07 TI - Photocatalytic Degradation and Antioxidant Properties of Carbon Quantum Dots Derived from Leaves of Antigonon leptopus BT - Proceedings of the International Conference on Bio-Based Environment for Sustainable Territory (ICBEST 2024) PB - Atlantis Press SP - 272 EP - 286 SN - 2468-5747 UR - https://doi.org/10.2991/978-94-6463-648-2_20 DO - 10.2991/978-94-6463-648-2_20 ID - Pallavi2025 ER -