Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies

Basavaraja, BM and Bantwal, RP and Tripathi, A and Hegde, G and John, NS and Thapa, R and Hegde, G and Balakrishna, RG and Saxena, M and Altaee, A and Samal, AK (2023) Functionalized Silver Nanocubes for the Detection of Hazardous Analytes through Surface-Enhanced Raman Scattering: Experimental and Computational Studies. In: ACS Sustainable Chemistry and Engineering, 11 (29). pp. 10605-10619.

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Abstract

The functionalization of nanomaterials offers a significant impact on environmental protection. Three silver composites, silver nanocubes (Ag NCs) with cellulose (Ag-CE), Ag NCs with chitosan (Ag-CH), and Ag NCs with neutral alumina (Ag-NA), were synthesized with the incorporation of a very low concentration of Ag NCs. The synthesized Ag-composites were used for the detection of hazardous analytes, 4-mercaptobenzoic acid (4-MBA), rhodamine 6G (R6G), and methylene blue (MB), via a highly sensitive surface-enhanced Raman scattering (SERS) technique. The enhancement factors for the detection of MB were found to be 1.2 × 106, 1.4 × 106, and 3.7 × 105 using Ag-CE, Ag-CH, and Ag-NA, respectively. Limits of detection of 1 nM, 100 pM, and 100 μM were achieved for MB using Ag-CE, Ag-CH, and Ag-NA, respectively. The Ag-CH composite achieved excellent sensitivity and enhancement for the detection of MB compared to the other two Ag-composites. The order of detection efficiency of MB using Ag-composites was measured theoretically and follows the order Ag-CH > Ag-CE > Ag-NA. A real-time filtration unit showed excellent efficiency for MB removal. The present method can be employed in commercial filtration processes for the benefit of the environment and sustainable development.

Item Type:	Journal Article
Publication:	ACS Sustainable Chemistry and Engineering
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	cellulose (CE); chitosan (CH); filtration; methylene blue (MB); neutral alumina (NA); silver nanocubes (Ag NCs)
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	29 Nov 2023 09:28
Last Modified:	29 Nov 2023 09:28
URI:	https://eprints.iisc.ac.in/id/eprint/82903

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