Addition of Sulphur to Graphene Nanoflakes Using Thermal Plasma for Oxygen Reduction Reaction in Alkaline Medium

Legrand, Ulrich; Meunier, Jean‐Luc; Berk, Dimitrios

doi:10.1007/s11090-017-9787-9

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…Such a thermal plasma process has also been used in the past for producing and in-situ chemical functionalization of very pure graphene structures in large scales [44,[54][55][56]. This is achieved through a strong control of the thermal history of particle nucleation and growth providing uniform residence times for reactants in both the condensation and growth zones [47,48].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of boron nitride nanosheets powders using a plasma based bottom-up approach

Alrebh

Meunier

2021

2D Mater.

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Boron nitride nanosheets (BNNS) are graphene-like materials with large bandgap and excellent thermal/chemical stability. Current BNNS synthesis methods show low yield and/or purity preventing effective implementation in real-life applications. This work reports two catalyst-free bottom-up approaches for BNNS synthesis using induction thermal plasma. High enthalpy and cooling rates of this plasma allow BNNS to form homogeneously when using solid ammonia borane (AB) as a precursor. In this case, clusters of B x N y H z nucleate to form particles of critical sizes on which BNNS propagate while releasing H2. Using boron powders instead of AB produces BNNS through a heterogeneous route. In this case, boron undergoes spheroidization while active nitrogen species diffuse on the liquid surface to form boron nitride nanowalls which propagate into BNNS. The operating pressure and nitrogen loading are shown to control BNNS nucleation and growth and minimize by-products. An optimum operating pressure of 62 kPa provides axial velocities necessary for decomposing AB and melting boron. The synthesis process is well controlled yielding homogeneously grown BNNS of 30 × 30 nm sheet lateral sizes and ∼8 atomic layers, while the heterogeneously grown BNNS are of 100 × 100 nm and ∼20 layers. Both homogeneous and heterogeneous routes lead to BNNS structures showing exceptional crystallinity with defect-free stacking of the BN planes.

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Section: Introductionmentioning

confidence: 99%

Synthesis of boron nitride nanosheets powders using a plasma based bottom-up approach

Alrebh

Meunier

2021

2D Mater.

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Sulphur functionalizion of graphene oxide by radiofrequency plasma

Pietro

Forte

Snyders

et al. 2020

Plasma Processes & Polymers

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Tailoring the surface properties of graphene oxide by the grafting of heteroatom‐based functionalities is mandatory for the applicative purpose. In this context, here, we investigate the grafting of sulphur functionalized graphene oxide surface (GO–XSH) via a plasma‐based method. The impact of the treatment on the chemical composition and the morphology of GO–XSH was evaluated combining microscopic (atomic force microscopy) and spectroscopic techniques (X‐ray photoelectron spectroscopy and Fourier transform infrared spectroscopy). Optimized experimental conditions have been identified, considering Ar/H2S gas mixture, for an efficient grafting of –SH groups on the GO surface. This is explained by the creation of defects by bombarding ions during the treatment, followed by subsequent chemisorption of sulphur‐based radicals produced in the plasma. The whole set of our results demonstrates the attractiveness of our strategy for tuning the surface properties of GO of interest for biological applications.

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Decoration of N-functionalized graphene nanoflakes with copper-based nanoparticles for high selectivity CO2 electroreduction towards formate

Legrand

Boudreault

Meunier

2019

Electrochimica Acta

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Addition of Sulphur to Graphene Nanoflakes Using Thermal Plasma for Oxygen Reduction Reaction in Alkaline Medium

Cited by 4 publications

References 30 publications

Synthesis of boron nitride nanosheets powders using a plasma based bottom-up approach

Synthesis of boron nitride nanosheets powders using a plasma based bottom-up approach

Sulphur functionalizion of graphene oxide by radiofrequency plasma

Decoration of N-functionalized graphene nanoflakes with copper-based nanoparticles for high selectivity CO2 electroreduction towards formate

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