Copyright (c) 2026 Dr.T.Kavitha Thavuduraj, Dr.P.Sarojini Perumalswamy
This work is licensed under a Creative Commons Attribution 4.0 International License.
Multifunctional β-CD Ag/Cu Nanocomposite with Spongy Cotton Bud-Like Architecture for Photocatalytic and Biological Applications
Corresponding Author(s) : T. Kavitha
Asian Journal of Chemistry,
Vol. 38 No. 6 (2026): Vol. 38 Issue No 6, 2026
Abstract
Photocatalytic degradation of dyes using metal oxides and their composites is an effective method for the removal of pollutants from wastewater systems. Metal oxides exhibit enhanced efficiency due to their broad light absorption, rapid charge transfer dynamics and inherent p-n properties. In this work, a β-cyclodextrin-supported silver/copper nanocomposite (β-CD Ag/Cu) was successfully synthesised via a eco-friendly hydrothermal method using ascorbic acid as a reducing agent. The synthesized nanocomposite was characterized by XRD, SEM, EDAX and DRS-UV analyses, confirming its crystalline nature, unique spongy cotton bud-like morphology and an average particle size of ~110 nm. Optical studies revealed a narrow band gap of 1.95 eV, indicating efficient visible-light absorption. The β-CD Ag/Cu nanocomposite exhibited excellent photocatalytic activity towards methylene blue (MB) and methyl orange (MO) dyes, achieving degradation efficiencies of 86.20 and 95.71%, respectively. The effects of catalyst dosage, dye concentration and pH were systematically optimized. Furthermore, the nanocomposite demonstrated significant antioxidant activity against DPPH radicals and strong antibacterial activity against Enterobacter sp., Pseudomonas sp. and Klebsiella sp., with Enterobacter sp. showing the highest sensitivity (24 mm zone of inhibition).
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D. Vaya and P.K. Surolia, Environ. Technol. Innov., 20, 101128 (2020); https://doi.org/10.1016/j.eti.2020.101128
R. Saravanan, S. Karthikeyan, V.K. Gupta, G. Sekaran, V. Narayanan and A. Stephen, Mater. Sci. Eng. C, 33, 91 (2013); https://doi.org/10.1016/j.msec.2012.08.011
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A.M. Musuc, Molecules, 29, 5319 (2024); https://doi.org/10.3390/molecules29225319
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P.F. Andrade, A.F. de Faria, D.S. da Silva, J.A. Bonacin and M.C. Gonçalves, Colloids Surf. B Biointerfaces, 118, 289 (2014); https://doi.org/10.1016/j.colsurfb.2014.03.032
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