Laser-assisted synthesis of gold–graphene oxide nanocomposites: effect of pulse duration

Bobb, Julian A.; Rodrigues, Collin J.; El‐Shall, M. Samy; Tibbetts, Katharine Moore

doi:10.1039/d0cp02953j

Cited by 10 publications

(11 citation statements)

References 65 publications

(172 reference statements)

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“…Moreover, the weak and broad 2D and D + G bands at 2680 cm −1 and 2910 cm −1 arise from disorder due to formation of oxygen functional groups [55]. The presence of oxygen functional groups is confirmed by the FTIR spectra (Figure 4c) with peaks indicating C=O stretch of COOH groups at 1722 and 1696 cm −1 , COO − stretch at 1415, 1522, 1575 cm −1 , O-H deformations of C-OH groups at 1356 cm −1 , C-O stretch of epoxide groups at 1261 cm −1 , C-O stretch at 1000-1100 cm −1 , and C-H bend at 800 cm −1 [56,57], although some of these bands may be overlapped with vibrational modes of other functional groups. Notably, these IR peaks grow in intensity over the course of 24 h after synthesis, suggesting that the carbon shell formation occurs mostly after laser irradiation is terminated.…”

Section: Catalytic Reduction Of Para-nitrophenol (Pnp)mentioning

confidence: 67%

“…Raman spectra shown in Figure 4b closely resemble graphite oxide spectra [55]. The intense G band at 1600 cm −1 and D band at 1350 cm −1 correspond to the in-plane vibrational modes of sp 2 -hybridized carbon atoms and structural disorder due to functionalization, respectively [56]. Moreover, the weak and broad 2D and D + G bands at 2680 cm −1 and 2910 cm −1 arise from disorder due to formation of oxygen functional groups [55].…”

Section: Catalytic Reduction Of Para-nitrophenol (Pnp)mentioning

confidence: 79%

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Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

2021

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We report the synthesis of air-stable Cu nanoparticles (NPs) using the bottom-up laser reduction in liquid method. Precursor solutions of copper acetlyacetonate in a mixture of methanol and isopropyl alcohol were irradiated with femtosecond laser pulses to produce Cu NPs. The Cu NPs were left at ambient conditions and analyzed at different ages up to seven days. TEM analysis indicates a broad size distribution of spherical NPs surrounded by a carbon matrix, with the majority of the NPs less than 10 nm and small numbers of large particles up to ∼100 nm in diameter. XRD collected over seven days confirmed the presence of fcc-Cu NPs, with some amorphous Cu2O, indicating the stability of the zero-valent Cu phase. Raman, FTIR, and XPS data for oxygen and carbon regions put together indicated the presence of a graphite oxide-like carbon matrix with oxygen functional groups that developed within the first 24 h after synthesis. The Cu NPs were highly active towards the model catalytic reaction of para-nitrophenol reduction in the presence of NaBH4.

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Section: Catalytic Reduction Of Para-nitrophenol (Pnp)mentioning

confidence: 67%

Section: Catalytic Reduction Of Para-nitrophenol (Pnp)mentioning

confidence: 79%

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

2021

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“…349 Tibbetts and El-Shall et al prepared gold−graphene oxide nanocomposites using 532 nm, 8 ns or 800 nm, 30 fs pulses to irradiate precursor solutions that consisted of 0.1 mM KAuCl 4 , 0.35 mM KOH, and graphene oxide (0.0033−0.33 mg mL −1 ) in water. 350 The nanosecond laser led to a broad (5.8 ± 1.9) nm gold nanoparticle distribution, whereas two distinct distributions of (3.5 ± 0.8) and (10.1 ± 1.4) nm were obtained from femtosecond laser irradiation. Despite these different size distributions, both Au−graphene oxide nanocomposites exhibited similarly high catalytic activities toward p-nitrophenol reduction by NaBH 4 , as compared to unsupported 4−5 nm Au nanoparticles.…”

Section: Catalysts For 4-nitrophenol and Nitrobenzene Reductionsmentioning

confidence: 92%

Pulsed Laser in Liquids Made Nanomaterials for Catalysis

et al. 2021

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Catalysis is essential to modern life and has a huge economic impact. The development of new catalysts critically depends on synthetic methods that enable the preparation of tailored nanomaterials. Pulsed laser in liquids synthesis can produce uniform, multicomponent, nonequilibrium nanomaterials with independently and precisely controlled properties, such as size, composition, morphology, defect density, and atomistic structure within the nanoparticle and at its surface. We cover the fundamentals, unique advantages, challenges, and experimental solutions of this powerful technique and review the state-of-the-art of laser-made electrocatalysts for water oxidation, oxygen reduction, hydrogen evolution, nitrogen reduction, carbon dioxide reduction, and organic oxidations, followed by laser-made nanomaterials for light-driven catalytic processes and heterogeneous catalysis of thermochemical processes. We also highlight laser-synthesized nanomaterials for which proposed catalytic applications exist. This review provides a practical guide to how the catalysis community can capitalize on pulsed laser in liquids synthesis to advance catalyst development, by leveraging the synergies of two fields of intensive research.

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“…Alternatively to the production methodologies described above, there are the bottom-up methods that are based on the use of hydrocarbons compounds as precursors ( Lim et al, 2018 ; Kumar et al, 2021 ). These methods include epitaxial growth ( Sutter et al, 2008 ), thermal pyrolysis ( Amirov et al, 2015 ), laser-assisted synthesis ( Bobb et al, 2020 ), organic synthesis ( Wu et al, 2007 ) and chemical vapour deposition (CVD) ( Mattevi et al, 2011 ; Saeed et al, 2020 ). The latter was firstly described in 2006 by Somani et al and is one of the most popular bottom-up approaches due to the relatively simple procedure and reaction control ( Somani et al, 2006 ).…”

Section: Graphene Graphene Oxide and Reduced Graphene Oxidementioning

confidence: 99%

Graphene Oxide and Biomolecules for the Production of Functional 3D Graphene-Based Materials

Passaretti

2022

Front. Mol. Biosci.

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Graphene and its derivatives have been widely employed in the manufacturing of novel composite nanomaterials which find applications across the fields of physics, chemistry, engineering and medicine. There are many techniques and strategies employed for the production, functionalization, and assembly of graphene with other organic and inorganic components. These are characterized by advantages and disadvantages related to the nature of the specific components involved. Among many, biomolecules and biopolymers have been extensively studied and employed during the last decade as building blocks, leading to the realization of graphene-based biomaterials owning unique properties and functionalities. In particular, biomolecules like nucleic acids, proteins and enzymes, as well as viruses, are of particular interest due to their natural ability to self-assemble via non-covalent interactions forming extremely complex and dynamic functional structures. The capability of proteins and nucleic acids to bind specific targets with very high selectivity or the ability of enzymes to catalyse specific reactions, make these biomolecules the perfect candidates to be combined with graphenes, and in particular graphene oxide, to create novel 3D nanostructured functional biomaterials. Furthermore, besides the ease of interaction between graphene oxide and biomolecules, the latter can be produced in bulk, favouring the scalability of the resulting nanostructured composite materials. Moreover, due to the presence of biological components, graphene oxide-based biomaterials are more environmentally friendly and can be manufactured more sustainably compared to other graphene-based materials assembled with synthetic and inorganic components. This review aims to provide an overview of the state of the art of 3D graphene-based materials assembled using graphene oxide and biomolecules, for the fabrication of novel functional and scalable materials and devices.

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Laser-assisted synthesis of gold–graphene oxide nanocomposites: effect of pulse duration

Abstract: Laser photoreduction of metal ions onto graphene oxide (GO) is a facile, environmentally friendly method to produce functional metal-GO nanocomposites for a variety of applications. This work compares Au-GO nanocomposites...

Cited by 10 publications

References 65 publications

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

Pulsed Laser in Liquids Made Nanomaterials for Catalysis

Graphene Oxide and Biomolecules for the Production of Functional 3D Graphene-Based Materials

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