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Preparation, Processing, and Application of Advanced Functional Carbon Materials
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Preparation, Processing, and Application of Advanced Functional Carbon Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Carbon Materials".

Deadline for manuscript submissions: 20 September 2024 | Viewed by 3431

Special Issue Editor

Dr. He Li

E-Mail Website
Guest Editor
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Interests: diamond preparation and applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Functional carbon materials are widely used in information, energy, machining, and other fields, and they are hot-point materials in scientific research. In recent years, scientists have developed a variety of new artificial carbon materials, which have revolutionized people's basic understanding of material science, promoted economic development, and expanded human understanding of nature.

Diamond is a natural allotrope of carbon with excellent mechanical, thermal, and optical properties. Single crystal diamond, polycrystalline diamond, and diamond composite materials all show their excellent functions and have been widely studied and expanded in their applications by scientists.

Graphite is another natural allotrope, and its sp2 hybrid molecular structure brings excellent thermal and electrical conductivity, which has great application potential for the development of high-power devices. Various derivatives of graphite, such as graphene, carbon nanotubes, fullerene, and other new carbon functional materials, are constantly being developed for new applications in various fields.

In this Special Issue, recent advances in functional carbon materials, including bulk material or thin film preparation, machining, characterization, and applications, will be highlighted and discussed.

It is my pleasure to invite you to submit your research to this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. He Li
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. Materials is an international peer-reviewed open access semimonthly 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 2600 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

  • diamond preparation and characterization methods
  • diamond applications in various field
  • carbon composite preparation and applications
  • graphite, graphene, carbon nanotube, and fullerene characterization and applications

Published Papers (4 papers)

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Research

11 pages, 3562 KiB  
Article
Bubble-Mediated Production of Few-Layer Graphene via Vapor–Liquid Reaction between Carbon Dioxide and Magnesium Melt
by Xuejian Li, Xiaojun Wang, Hailong Shi, Yuchao Jin, Xiaoshi Hu, Chao Xu, Lunyuan Tang, Min Ma and Liwei Lu
Materials 2024, 17(4), 897; https://doi.org/10.3390/ma17040897 - 15 Feb 2024
Viewed by 545
Abstract
It is urgent to develop novel technologies to convert carbon dioxide to graphene. In this work, a bubble-mediated approach via a chemical reaction between carbon dioxide gas and magnesium melt to fabricate a few-layer graphene was illustrated. The morphology and defects of graphene [...] Read more.
It is urgent to develop novel technologies to convert carbon dioxide to graphene. In this work, a bubble-mediated approach via a chemical reaction between carbon dioxide gas and magnesium melt to fabricate a few-layer graphene was illustrated. The morphology and defects of graphene can be regulated by manipulating the melt temperature. The preparation of graphene at 720 °C exhibited an excellent quality of surface and graphitization degree. The high-quality few-layer graphene can be grown under the combined effect of carbon dioxide bubbles and in-situ grown MgO. This preparation method possesses the advantages of high efficiency, low cost, and environmental protection, which may provide a new strategy for the recovery and reuse of greenhouse gases. Full article
(This article belongs to the Special Issue Preparation, Processing, and Application of Advanced Functional Carbon Materials)
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14 pages, 3622 KiB  
Article
Flexible Dry Electrode Based on a Wrinkled Surface That Uses Carbon Nanotube/Polymer Composites for Recording Electroencephalograms
by Jihyeon Oh, Kun-Woo Nam, Won-Jin Kim, Byung-Ho Kang and Sung-Hoon Park
Materials 2024, 17(3), 668; https://doi.org/10.3390/ma17030668 - 30 Jan 2024
Viewed by 831
Abstract
Electroencephalography (EEG) captures minute electrical signals emanating from the brain. These signals are vulnerable to interference from external noise and dynamic artifacts; hence, accurately recording such signals is challenging. Although dry electrodes are convenient, their signals are of limited quality; consequently, wet electrodes [...] Read more.
Electroencephalography (EEG) captures minute electrical signals emanating from the brain. These signals are vulnerable to interference from external noise and dynamic artifacts; hence, accurately recording such signals is challenging. Although dry electrodes are convenient, their signals are of limited quality; consequently, wet electrodes are predominantly used in EEG. Therefore, developing dry electrodes for accurately and stably recording EEG signals is crucial. In this study, we developed flexible dry electrodes using polydimethylsiloxane (PDMS)/carbon-nanotube (CNT) composites with isotropically wrinkled surfaces that effectively combine the advantages of wet and dry electrodes. Adjusting the PDMS crosslinker ratio led to good adhesion, resulting in a highly adhesive CNT/PDMS composite with a low Young’s modulus that exhibited excellent electrical and mechanical properties owing to its ability to conformally contact skin. The isotropically wrinkled surface also effectively controls dynamic artifacts during EEG signal detection and ensures accurate signal analysis. The results of this study demonstrate that dry electrodes based on flexible CNT/PDMS composites and corrugated structures can outperform wet electrodes. The introduction of such electrodes is expected to enable the accurate analysis and monitoring of EEG signals in various scenarios, including clinical trials. Full article
(This article belongs to the Special Issue Preparation, Processing, and Application of Advanced Functional Carbon Materials)
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13 pages, 4050 KiB  
Article
Graphite Equivalent Evaluation of Anthracite-Associated Graphite by Raman Spectroscopy
by Wubo Chu, Wen Dai, Bo Wang, Chen Ye, Weiping Xie, Bing Yin, He Li and Nan Jiang
Materials 2023, 16(23), 7278; https://doi.org/10.3390/ma16237278 - 22 Nov 2023
Viewed by 647
Abstract
Anthracite-associated graphite is an important graphite resource with a wide range of applications besides being used as a fuel. This paper introduces a method for evaluating the graphite equivalent evaluation of anthracite-associated graphite. A series of graphite-anthracite standard samples with known graphite content [...] Read more.
Anthracite-associated graphite is an important graphite resource with a wide range of applications besides being used as a fuel. This paper introduces a method for evaluating the graphite equivalent evaluation of anthracite-associated graphite. A series of graphite-anthracite standard samples with known graphite content were prepared, and their Raman spectra were obtained using a Raman spectrometer. By employing peak-fitting analysis to decipher the peak spectrum information of the D peak and G peak, trends in the peak position, peak intensity ratio, half-width, and peak area of the D peak and G peak in standard samples with different graphite contents were obtained. Subsequently, a standard curve and fitting equation were established using the peak area data. The goodness of fit for the equation (R2) was 0.9984. Then the equation was used to evaluate 100 natural anthracite-associated graphite samples with unknown graphite content, obtaining a corresponding graphite equivalent evaluation. Full article
(This article belongs to the Special Issue Preparation, Processing, and Application of Advanced Functional Carbon Materials)
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19 pages, 3812 KiB  
Article
Non-Isothermal Crystallization Kinetics and Activation Energy for Crystal Growth of Polyamide 66/Short Glass Fiber/Carbon Black Composites
by Yasser Boucenna, Abdelheq Layachi, Abdelhakim Cherfia, Fouad Laoutid and Hamid Satha
Materials 2023, 16(22), 7073; https://doi.org/10.3390/ma16227073 - 07 Nov 2023
Viewed by 1000
Abstract
This study presents the effect of the addition of 0.4 wt.% carbon black (CB) to polyamide 66 (PA66) containing 30 wt.% short glass fibers (GFs) on the behavior of composite thermal crystallization. Composites were studied by differential scanning calorimetry analysis (DSC) at different [...] Read more.
This study presents the effect of the addition of 0.4 wt.% carbon black (CB) to polyamide 66 (PA66) containing 30 wt.% short glass fibers (GFs) on the behavior of composite thermal crystallization. Composites were studied by differential scanning calorimetry analysis (DSC) at different cooling rates using wide-angle X-ray scattering (WAXS) and scanning electron microscopy (SEM). This thermal crystallization study highlights the nucleation effect of GFs that promote PA66 crystallization by significantly increasing crystallization kinetics and rates. The activation energies (Eas) calculated by model-free (FWO; KAS) and model-fitting (Kissinger method and C–R method) approaches showed that the combination of both GF and CB decreases the activation energy with respect to neat PA66, meaning that the presence of both additives facilitates crystallization. The Coats–Redfern and Criado methods showed that the crystallization of neat PA66 and related composites follows the second-order reaction, i.e., the decelerated reaction, evidencing compatibility between GFs and the matrix. Full article
(This article belongs to the Special Issue Preparation, Processing, and Application of Advanced Functional Carbon Materials)
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