Easy method to prepare N-doped carbon nanotubes by ball milling

Soares, O.S.G.P.; Rocha, Raquel P.; Gonçalves, Alexandra; Figueiredo, José; Órfão, J.J.M.; Pereira, M.F.R.

doi:10.1016/j.carbon.2015.04.050

Cited by 125 publications

(92 citation statements)

References 37 publications

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“…Recently, an easy to handle method to prepare N-doped carbon nanotubes [50] and also N-doped graphene oxide (GO) was developed [51], involving ball milling, followed by thermal treatment under N 2 up to 600˝C, avoiding the use of solvents and production of wastes. Incorporation of large amounts of N-groups (pyridine, N-6; pyrrole, N-5, and quaternary nitrogen, N-Q) is especially obtained using melamine as N-precursor by this method (see Figure 5).…”

Section: Nitrogen-containing Surface Groupsmentioning

confidence: 99%

“…Figure 5. Illustration of the novel easy method to prepare N-doped carbon nanotubes by ball milling, with detailed N1s spectra evolution (adapted from [50,52]). …”

Section: Nitrogen-containing Surface Groupsmentioning

confidence: 99%

“…Even without any functionalization, the performance of pristine CNTs can be improved using mechanical treatments [24,52], as ball milling. This treatment markedly reduces the entanglement of the CNTs, also leading to shorter CNTs by breaking up the tubes [24,50,83], and increasing their specific surface area. The influence of ball-milling on the texture and surface properties of multi-walled carbon nanotubes to be used as catalysts for the ozonation of oxalic acid was recently studied [24].…”

Section: Environmental Catalytic Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Tuning CNT Properties for Metal-Free Environmental Catalytic Applications

Rocha

Soares

Figueiredo

et al. 2016

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Abstract:The application of carbon nanotubes (CNTs) as metal-free catalysts is a novel approach for heterogeneous liquid phase catalytic systems. Textural and chemical modifications by liquid/gas phase or mechanical treatments, as well as solid state reactions, were successfully applied to obtain carbon nanotubes with different surface functionalities. Oxygen, nitrogen, and sulfur are the most common heteroatoms introduced on the carbon surface. This short-review highlights different routes used to develop metal-free carbon nanotube catalysts with enhanced properties for Advanced Oxidation Processes.

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Section: Nitrogen-containing Surface Groupsmentioning

confidence: 99%

“…Figure 5. Illustration of the novel easy method to prepare N-doped carbon nanotubes by ball milling, with detailed N1s spectra evolution (adapted from [50,52]). …”

Section: Nitrogen-containing Surface Groupsmentioning

confidence: 99%

Section: Environmental Catalytic Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Tuning CNT Properties for Metal-Free Environmental Catalytic Applications

Rocha

Soares

Figueiredo

et al. 2016

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“…In addition, their one-dimensional structure makes them an ideal platform for biomedical applications. Due to their important applications a significant number of methods to produce CNTs were developed: arc discharge method [25], laser method [26], chemical vapor deposition (CVD) [27], ball milling [28], etc. Final properties of CNTs are dependent on the production and purification methods.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanocomposites Studied by Raman Spectroscopy

Bîru¹,

Iovu²

2018

Raman Spectroscopy

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The goal of this chapter is to provide a general introduction about graphene nanocomposites studied by Raman spectroscopy. The chapter will therefore begin with a brief description of the major Raman bands of carbon allotropes. In the following chapter a concise comparison between single walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs), fullerenes and graphene is exposed. The characteristic features in Raman spectra of carbon allotropes, namely the intense signals D and G are investigated. In particular, the chapter will outline the Raman spectrum of graphene and different types of graphene oxide. The last part of the chapter is devoted to graphene nanocomposites.

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“…Recently, a novel solvent-free methodology was reported [36] to incorporate N-functionalities into CNTs by ball-milling followed by a thermal treatment, and very high catalytic activities were achieved when these metal-free catalysts were tested in batch mode for the removal of oxalic acid by CWO [37].…”

Section: Introductionmentioning

confidence: 99%