Photocatalytic Degradation and Antioxidant Properties of Carbon Quantum Dots Derived from Leaves of Antigonon leptopus

K. Pallavi; B. Mallikarjuna; Abhinash Marukurti; R. Ramesh Raju; P. Vijaya Nirmala; N. Madhavi; N. Srinivasa Rao

doi:10.2991/978-94-6463-648-2_20

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Photocatalytic Degradation and Antioxidant Properties of Carbon Quantum Dots Derived from Leaves of Antigonon leptopus

Authors

K. Pallavi¹^{, 2}, B. Mallikarjuna², Abhinash Marukurti³, R. Ramesh Raju⁴, P. Vijaya Nirmala³, N. Madhavi¹^{, *}, N. Srinivasa Rao⁵

¹Department of Chemistry, J K C College, Guntur, Andhra Pradesh, India

²Department of Chemistry, Government College (A), Rajamahendravaram, Andhra Pradesh, India

³School of Life and Health Sciences, Adikavi Nannaya University, Rajamahendravaram, Andhra Pradesh, India

⁴Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India

⁵Department of Geology, Government College (A), Rajamahendravaram, Andhra Pradesh, India

^*Corresponding author. Email: madhavijkcchempg@gmail.com

Corresponding Author

N. Madhavi

Available Online 7 February 2025.

DOI: 10.2991/978-94-6463-648-2_20 How 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.
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.

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Volume Title: Proceedings of the International Conference on Bio-Based Environment for Sustainable Territory (ICBEST 2024)
Series: Advances in Biological Sciences Research
Publication Date: 7 February 2025
ISBN: 978-94-6463-648-2
ISSN: 2468-5747
DOI: 10.2991/978-94-6463-648-2_20 How to use a DOI?
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.

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ris enw bib

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  -

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