In Situ Decoration of Gold Nanoparticles on Graphene Oxide via Nanosecond Laser Ablation for Remarkable Chemical Sensing and Catalysis
Autor: | Rodolphe Antoine, Nandakumar Kalarikkal, Sabu Thomas, Parvathy Nancy, Anju K. Nair |
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Přispěvatelé: | Mahatma Gandhi University, St. Teresas’s College, Spectrométrie des biomolécules et agrégats (SPECTROBIO), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, School of Chemical Sciences, Mahatma Gandhi University, Kottayam |
Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Materials science
General Chemical Engineering Oxide Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Article Nanomaterials Catalysis law.invention lcsh:Chemistry chemistry.chemical_compound [SPI]Engineering Sciences [physics] law [CHIM]Chemical Sciences General Materials Science [PHYS]Physics [physics] Laser ablation Graphene Surface-enhanced Raman spectroscopy 021001 nanoscience & nanotechnology 0104 chemical sciences Au-GO nano-hybrid chemistry lcsh:QD1-999 Colloidal gold gold nanoparticles laser ablation graphene oxide 0210 nano-technology |
Zdroj: | Nanomaterials Volume 9 Issue 9 Nanomaterials, MDPI, 2019, 9 (9), pp.1201. ⟨10.3390/nano9091201⟩ Nanomaterials, Vol 9, Iss 9, p 1201 (2019) |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano9091201 |
Popis: | Gold decorated graphene-based nano-hybrids find extensive research interest due to their enhanced chemical catalytic performance and biochemical sensing. The unique physicochemical properties and the very large surface area makes them propitious platform for the rapid buildouts of science and technology. Graphene serves as an outstanding matrix for anchoring numerous nanomaterials because of its atomically thin 2D morphological features. Herein, we have designed a metal-graphene nano-hybrid through pulsed laser ablation. Commercially available graphite powder was employed for the preparation of graphene oxide (GO) using modified Hummers&rsquo method. A solid, thin gold (Au) foil was ablated in an aqueous suspension of GO using second harmonic wavelength (532 nm) of the Nd:YAG laser for immediate generation of the Au-GO nano-hybrid. The synthesis strategy employed here does not entail any detrimental chemical reagents and hence avoids the inclusion of reagent byproducts to the reaction mixture, toxicity, and environmental or chemical contamination. Optical and morphological characterizations were performed to substantiate the successful anchoring of Au nanoparticles (Au NPs) on the GO sheets. Remarkably, these photon-generated nano-hybrids can act as an excellent surface enhanced Raman spectroscopy (SERS) platform for the sensing/detection of the 4-mercaptobenzoic acid (4-MBA) with a very low detection limit of 1 × 10&minus 12 M and preserves better reproducibility also. In addition, these hybrid materials were found to act as an effective catalyst for the reduction of 4-nitrophenol (4-NP). Thus, this is a rapid, mild, efficient and green synthesis approach for the fabrication of active organometallic sensors and catalysts. |
Databáze: | OpenAIRE |
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