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C
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Nitrogen-Doped Carbon Materials
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Nitrogen-Doped Carbon Materials

A special issue of C (ISSN 2311-5629).

Deadline for manuscript submissions: closed (1 April 2019) | Viewed by 12071

Special Issue Editor

Dr. Salomé Soares

E-Mail Website
Guest Editor
Laboratory of Separation and Reaction Engineering—Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
Interests: heterogeneous catalysis; air and water treatment; hydrogenation and oxidation reactions; energy conversion; preparation and characterization of catalysts and materials; smart textiles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of carbon materials by tailoring textural and surface chemical properties represents one of the most active research fields. In the last few years, several routes have been attempted to modify the carbon structure, in order to develop new functional materials with enhanced properties to fit the requirements of their final applications. Particularly, the remarkable electronic properties and catalytic performances of nitrogen-doped carbon materials are attracting a great deal of interest. N-doping of carbon materials can be attained in situ during synthesis or ex situ using appropriate post treatments, leading to different types of N-containing groups and N-content, which allow their use in different fields of electronics, biomedical, energy, chemical and environmental technologies, and catalytic applications.

In this Special Issue of C—Journal of Carbon Research, we invite authors to submit original communications, articles, and reviews about different synthesis procedures, chemistry, characterization and applications of N-doped carbon materials.

Dr. Olívia Salomé G.P. Soares
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. C is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Carbon materials
  • N-doping
  • Synthesis of N-doped carbon materials
  • Characterization of N-doped carbon materials
  • Applications of N-doped carbon materials
  • Catalytic applications of N-doped carbon materials

Published Papers (3 papers)

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Research

14 pages, 2544 KiB  
Article
Mechanothermal Approach for N-, S-, P-, and B-Doping of Carbon Nanotubes: Methodology and Catalytic Performance in Wet Air Oxidation
by Olívia Salomé G. P. Soares, Raquel P. Rocha, José J. M. Órfão, Manuel Fernando R. Pereira and José L. Figueiredo
C 2019, 5(2), 30; https://doi.org/10.3390/c5020030 - 04 Jun 2019
Cited by 13 | Viewed by 3604
Abstract
The texture and the surface chemistry of carbon nanotubes (CNTs) were modified using a solvent-free methodology involving a ball-milling mechanical treatment and thermal treatment under nitrogen in the presence of adequate precursors (melamine, sodium thiosulfate, sodium dihydrogen phosphate, and boric acid) of different [...] Read more.
The texture and the surface chemistry of carbon nanotubes (CNTs) were modified using a solvent-free methodology involving a ball-milling mechanical treatment and thermal treatment under nitrogen in the presence of adequate precursors (melamine, sodium thiosulfate, sodium dihydrogen phosphate, and boric acid) of different heteroatoms (N, S, P, and B, respectively). The incorporation of these heteroatoms promotes significant changes in the pristine textural and chemical properties. This easy post-doping method allows the introduction of large concentrations of heteroatoms. Their effect on the catalytic activity of the materials was evaluated in the oxidation of oxalic acid by catalytic wet air oxidation (CWAO), as an alternative to the noble metal and rare earth oxide catalysts traditionally used in this process. Improved catalytic activities were obtained using the N-, P-, and B-doped CNTs in oxalic acid oxidation, while the S-doped CNT sample underperformed in comparison to the pristine material. Full article
(This article belongs to the Special Issue Nitrogen-Doped Carbon Materials)
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15 pages, 3032 KiB  
Article
Highly Active, High Specific Surface Area Fe/C/N ORR Electrocatalyst from Liquid Precursors by Combination of CO2 Laser Pyrolysis and Single NH3 Thermal Post-Treatment
by Henri Perez, Virginie Jorda, Jackie Vigneron, Mathieu Frégnaux, Arnaud Etcheberry, Axelle Quinsac, Yann Leconte and Olivier Sublemontier
C 2019, 5(2), 26; https://doi.org/10.3390/c5020026 - 14 May 2019
Cited by 3 | Viewed by 4435
Abstract
This paper reports original results on the synthesis and characterization of Fe/C/N ORR electrocatalysts obtained by a combination of CO2 laser pyrolysis and thermal post-treatment. The precursor liquid media, consisting in a 14 g·L−1 iron III acetylacetonate solution in toluene, was [...] Read more.
This paper reports original results on the synthesis and characterization of Fe/C/N ORR electrocatalysts obtained by a combination of CO2 laser pyrolysis and thermal post-treatment. The precursor liquid media, consisting in a 14 g·L−1 iron III acetylacetonate solution in toluene, was aerosolized and then exposed to a CO2 laser beam for pyrolysis in continuous flow. Ammonia was used in the pyrolysis process, both as the laser wavelength absorbing gas (i.e., energy transfer agent) and as the sole source of nitrogen. After the laser pyrolysis step, the material was submitted to thermal post-treatment under argon on the one hand, and ammonia on another hand. The three materials—one as-prepared, one thermally treated under argon, and one thermally treated under ammonia—were characterized, in particular, through specific surface area determination, XPS analysis, and ORR measurement. It was found that both kinds of thermal treatment significantly improved the ORR performances, which were evaluated on porous electrodes. Indeed, while the as-prepared material showed an ORR onset potential at ≈790 mV vs. the standard hydrogen electrode (SHE) in HClO4 1M, the argon treatment increased the latter to ≈820 mV, and the ammonia treatment led to a very high value of ≈910 mV. Selectivities of 3.65 and 3.93 were measured for the argon and ammonia treated materials, respectively. The outstanding ORR performance resulting from the ammonia treatment is probably related to the very high BET specific surface area measured at 1130 m2·g−1, which was notably obtained without using any templating or sacrificial component in the precursor media. Full article
(This article belongs to the Special Issue Nitrogen-Doped Carbon Materials)
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9 pages, 1327 KiB  
Communication
Preparation of MgO-Templated N-Doped Mesoporous Carbons from Polyvinylpyrrolidone: Effect of Heating Temperature on Pore Size Distribution
by Tomoya Takada and Mayu Kurihara
C 2019, 5(2), 15; https://doi.org/10.3390/c5020015 - 02 Apr 2019
Viewed by 3547
Abstract
Magnesium oxide (MgO)-templated nitrogen (N)-doped mesoporous carbons were prepared by using polyvinylpyrrolidone (PVP) as a raw material and magnesium lactate (Mglac) as a precursor for the MgO template to examine the influence of heating temperature and MgO precursor (magnesium acetate was used in [...] Read more.
Magnesium oxide (MgO)-templated nitrogen (N)-doped mesoporous carbons were prepared by using polyvinylpyrrolidone (PVP) as a raw material and magnesium lactate (Mglac) as a precursor for the MgO template to examine the influence of heating temperature and MgO precursor (magnesium acetate was used in similar previous studies) on the pore size and nitrogen content. The MgO-templated carbon was obtained by heating the PVP/Mglac mixture in an inert atmosphere followed by an acid treatment for MgO removal. The mesopore size of the carbons was approximately 4 nm regardless of heating temperature, corresponding to the crystallite size of the MgO template estimated via X-ray diffraction. This indicates that the mesopore of approximately 4 nm was generated using the MgO template. However, larger pores were also found to exist. This result indicates that the larger pores generated through processes other than the MgO templating, likely the thermal decomposition of PVP, are contained in the templated carbon. The volume of the larger pores and the specific surface area increased with increasing heating temperature. The nitrogen content of the carbon decreased as the heating temperature was increased, but it was found to be irrelevant to the MgO precursor. Full article
(This article belongs to the Special Issue Nitrogen-Doped Carbon Materials)
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