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Journal of Sol-Gel Science and Technology

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18-11-2023 | Original Paper

Chitosan-boehmite reinforced AgNPs prepared by the sol-gel method for cost-effective water disinfection

Authors: Faten Hasan, Ibrahim Alghoraibi

Published in: Journal of Sol-Gel Science and Technology | Issue 1/2024

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Abstract

One novel method for disinfecting water is the use of silver nanoparticles. The aim of this work was to prepare a granular antibacterial composite based on chitosan boehmite, enhanced with silver nanoparticles (Ag-CHB), and evaluate its antibacterial activity. The composite was prepared by the sol-gel method and characterized by FTIR, AFM, FESEM, EDS, and UV-VIS techniques. The topographical study using the AFM revealed a clear change in the surface shape of the composite after it was reinforced with silver nanoparticles. Additionally, FESEM images displayed that the particles of chitosan-boehmite supported with silver nanoparticles are polygonal granules with an average size of 61.93 nm. The EDX analysis showed that the percentage of silver atoms in the composite is about 1.24 wt%. The results of FTIR indicated that chitosan’s functional groups have specific interactions with silver and aluminum. According to XRD analysis, boehmite nanocrystals are orthorhombic, with a mean crystal size of 30 nm was confirmed. Optical characterization of the colloidal silver nanoparticles by UV-VIS technique revealed the presence of a clear surface plasmon band, with a peak wavelength of 389 nm. The stability in the water of the prepared composite was verified by the swelling test, and the swelling index was about 11.82%. The ability of the composite to kill bacteria was also verified before and after being reinforced with silver nanoparticles by the agar well diffusion method. The composite reinforced with silver nanoparticles showed antibacterial activity against E. coli, with a 10 mm inhibition zone diameter. Overall, these results indicated that the Ag-CHB composite has the potential for water disinfection and incorporation into household filtration systems.

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Title: Chitosan-boehmite reinforced AgNPs prepared by the sol-gel method for cost-effective water disinfection
Authors: Faten Hasan
Ibrahim Alghoraibi
Publication date: 18-11-2023
Publisher: Springer US
Published in: Journal of Sol-Gel Science and Technology / Issue 1/2024
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-023-06266-9

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Abstract

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