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Effect of size on physicochemical, antibacterial, and catalytic properties of Neolamarckia cadamba (burflower-tree) synthesized silver/silver chloride nanoparticles

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Abstract

Aqueous extract of Neolamarchia cadamba leaves were used in the synthesis of silver/silver chloride nanoparticles (Ag/AgCl NPs). Further they were separated based on their using step-wise centrifugation approach at 09,000, 12,000, and 15,000 rpm. Thus obtained NPs were characterized for their physicochemical features. NPs showed maximum absorbance at 455 nm, 415 nm, and 402 nm. All the NPs were found to be crystalline in nature with average crystallite size (nm) of 58.31, 23.43, and 09.56. Particle size distribution (nm) of NPs was observed to 435.43, 276.75, and 105.49, Surface charge (-mV) of NPs was observed to be 14.59, 23.90, and 32.17. Ag/AgCl NPs-rpm@15,000 showed antibacterial activity against Escherichia coli, coagulase-negative Staphylococci, and Staphylococcus aureus with zone of inhibition (mm) of 16.65, 13.69, and 14.02 at 50 µg per well, respectively. Ag/AgCl NPs-rpm@15,000 showed excellent catalytic activity in degradation of methyl red, methylene blue, rhodamine-B, and methyl orange dyes in the presence of sodium borohydride under 4, 6, 5, and 4 min with pseudo-first order rate constant (min−1) of 0.981 (96.4%), 0.666 (97.1%), 0.905 (98.1%), and 1.032 (96.6%), respectively. Furthermore, Ag/AgCl NPs-rpm@15,000 showed good catalytic efficiency even under different dye combinations. Total combination was degraded under 18 min.

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Acknowledgements

Authors thank Dr. Syam Prasad P (Associate Professor), Department of Physics (National Institute of Technology, Warangal) for providing the FTIR broker alpha II and Particle Analyzer facilities for analysis. Authors thank the Director, National Institute of Technology, Warangal (Telangana, India) for providing the research facilities required for the work. Also thank the M.H.R.D. for providing the fellowship.

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Contributions

Aditya Velidandi: Conceptualization, Methodology, Experimentation, Data curation, Writing-Original draft preparation, Reviewing and Editing. Mounika Sarvepalli: Experimentation. Prasad Aramanda: Experimentation. Maha Lakshmi Amudala: Experimentation. Dr. Rama Raju Baadhe: Supervision. All the authors read and approved the manuscript.

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Correspondence to Rama Raju Baadhe.

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Responsible Editor: George Z. Kyzas

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Highlights

1. Ag/AgCl NPs solution was centrifuged at rpm (09000, 12000, and 15000) to get varying sizes of NPs.

2. Ag/AgCl NPs were characterized using UV-Vis spec., FTIR, DLS, ZP, and XRD.

3. Ag/AgCl NPs-rpm@15000 showed good antibacterial activity against test bacteria.

4. Ag/AgCl NPs-rpm@15000 showed excellent catalytic activity in dye degradation in presence of SBH.

5. Ag/AgCl NPs-rpm@15000 activity was studied for different dye combinations in presence of SBH.

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Velidandi, A., Sarvepalli, M., Aramanda, P. et al. Effect of size on physicochemical, antibacterial, and catalytic properties of Neolamarckia cadamba (burflower-tree) synthesized silver/silver chloride nanoparticles. Environ Sci Pollut Res 30, 63231–63249 (2023). https://doi.org/10.1007/s11356-023-26427-1

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  • DOI: https://doi.org/10.1007/s11356-023-26427-1

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