``Rinse, Repeat'': An Efficient and Reusable SERS and Catalytic Platform Fabricated by Controlled Deposition of Silver Nanoparticles on Cellulose Paper

Das, Debanjan and Senapati, Subrata and Nanda, Karuna Kar (2019) ``Rinse, Repeat'': An Efficient and Reusable SERS and Catalytic Platform Fabricated by Controlled Deposition of Silver Nanoparticles on Cellulose Paper. In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 7 (16). pp. 14089-14101.

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Abstract

Grafting metal nanoparticles (NPs) on flexible platforms is being increasingly attempted to advance their usage in the field of catalysis, sensing, energy storage, etc. However, anchoring NPs on substrates is nontrivial as it involves surface modification of the NPs and/or the substrate, which makes the whole process tedious. Here, we extend the classical ``silver-mirror'' reaction to unmodified filter paper achieving a controllable deposition of Ag NPs. The Ag NPs/filter paper thus obtained was employed as an enhanced Raman scattering (SERS) substrate achieving detection limits down to picomolar (10(-12) M) and nanomolar (10(-9) M) concentrations for rhodamine 6G and rhodamine B, with an enhancement factor (EF) of 1.42 X 10(10) and 0.659 X 10(6), respectively. To check its usage for practical applications, the substrate was extended to detect trace amounts of illicit dyes used on common vegetables and contaminants in rain, pond, and tap water with excellent reproducibility. Moreover, the as-prepared Ag paper can be directly employed for 4-nitrophenol reduction, which can be completely reduced to 4-aminophenol (4-AP) in a single step within seconds. The substrate can be reused several times over without any noticeable change in its catalytic activity. Finally, we studied the chemical transformation of 4-nitrophenol to 4-aminophenol by studying the concomitant spectral response, thereby integrating catalysis and SERS on a single substrate. This method thus provides a facile avenue to low-cost paper-based functional substrates for multimodal applications.

Item Type:	Journal Article
Publication:	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Publisher:	AMER CHEMICAL SOC
Additional Information:	copyright for this article belongs to AMER CHEMICAL SOC
Keywords:	Surface enhanced raman spectroscopy (SERS); Flexible substrate; Plasmonics; Catalysis; 4-Nitrophenol reduction
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	20 Sep 2019 07:47
Last Modified:	20 Sep 2019 07:47
URI:	http://eprints.iisc.ac.in/id/eprint/63602

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