Advanced Carbon Based Nanomaterials

A special issue of C (ISSN 2311-5629). This special issue belongs to the section "Carbon Materials and Carbon Allotropes".

Deadline for manuscript submissions: closed (6 December 2022) | Viewed by 7008

Special Issue Editor

Department of Physics, University of Calabria, 87036 Rende, Italy
Interests: metal–oxide layers; polymers; cultural heritage; materials of biomedical interest; electrochromic devices; gel materials
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Special Issue Information

Dear Colleagues,

We would like to invite you to submit comprehensive research articles, reviews, communications, or letters to a Special Issue of CJournal of Carbon Research dedicated to advanced carbon-based nanomaterials.

In this Special Issue, we are looking for outstanding carbon materials of any type (graphite, graphene, activated carbons, carbon nanofibers or nanotubes, carbon black, hard carbons, carbon dots, carbon carbides, and so on) synthesized from different bioresources, such as biomass or biological waste, biopolymers, etc.

The aim is to present novel and interesting insights in the field of synthesis of biocarbon for advanced applications, including adsorption, catalysis/photocatalysis, energy storage, gas capture/storage, drug delivery, and sensing, among others. We would like to publish inspiring works that help us to take a step forward in the science of carbon materials.

We look forward to receiving your submissions.

Dr. Marco Castriota
Guest Editor

Manuscript Submission Information

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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

  • graphene
  • carbon nanotubes
  • carbon dots
  • carbon carbides
  • natural bioresources
  • 2D materials

Published Papers (3 papers)

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Research

17 pages, 8495 KiB  
Article
Obtention and Characterization of GO/Epoxy and GO-GPTMS/Epoxy Nanocompounds with Different Oxidation Degrees and Ultrasound Methods
by Areli Marlen Salgado-Delgado, Elizabeth Grissel González-Mondragón, Ricardo Hernández-Pérez, René Salgado-Delgado, José Alfonso Santana-Camilo and Alfredo Olarte-Paredes
C 2023, 9(1), 28; https://0-doi-org.brum.beds.ac.uk/10.3390/c9010028 - 01 Mar 2023
Cited by 2 | Viewed by 1968
Abstract
This work reports the obtention of nanocompounds from epoxy resin (EP) with graphenes at three different oxidation degrees (GO1, GO2, and GO3), functionalized with 3-glycidyloxypropyl trimethoxysilane (GPTMS), and three different graphene concentrations (1%, 2%, and 3%). The aim is to improve GO compatibility [...] Read more.
This work reports the obtention of nanocompounds from epoxy resin (EP) with graphenes at three different oxidation degrees (GO1, GO2, and GO3), functionalized with 3-glycidyloxypropyl trimethoxysilane (GPTMS), and three different graphene concentrations (1%, 2%, and 3%). The aim is to improve GO compatibility in EP and obtain a nanocompound with synergistic properties. Ultrasonic bath was used to disperse the GO, a factor in the effective interaction between GO and the polymeric matrix. The nanocompounds were characterized by FTIR, SEM, and mechanical tension testing. The FTIR analysis evidenced stretching bonds created during the functionalization of graphene oxide (GO) with the silane (GPTMS); they are characteristic Si-O-Si and Si-O-C at 1000 and 1085 cm−1, respectively. There was a difference between GO and GO-GPTMS nanocompounds regarding the formation of these signals. The SEM micrographs showed morphological changes when GO was added: the smooth fracture surface of EP became rougher. During tension testing, Young’s modulus (2.09 GPa) of GO2-GPTMS/epoxy nanocompounds (1% weight GO) increased by 35% while their resistance to traction (98.71 MPa) grew by 52%; both were higher than in pure EP. In conclusion, the variables studied (oxidation degrees and silanization) significantly affect the mechanical properties studied. Full article
(This article belongs to the Special Issue Advanced Carbon Based Nanomaterials)
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13 pages, 2688 KiB  
Article
Stable Carbon Dots from Microwave-Heated Carbon Nanoparticles Generating Organic Radicals for In Situ Additions
by Weixiong Liang, Buta Singh, Elton Y. Cao, Christopher E. Bunker, William Cannon, Lauren Petta, Ping Wang, Liju Yang, Li Cao, Annalise Scorzari and Ya-Ping Sun
Cited by 1 | Viewed by 1961
Abstract
Carbon dots (CDots) are small carbon nanoparticles with effective surface passivation by organic functionalization. In the reported work, the surface functionalization of preexisting small carbon nanoparticles with N-ethylcarbazole (NEC) was achieved by the NEC radical addition. Due to the major difference in [...] Read more.
Carbon dots (CDots) are small carbon nanoparticles with effective surface passivation by organic functionalization. In the reported work, the surface functionalization of preexisting small carbon nanoparticles with N-ethylcarbazole (NEC) was achieved by the NEC radical addition. Due to the major difference in microwave absorption between the carbon nanoparticles and organic species such as NEC, the nanoparticles could be selectively heated via microwave irradiation to enable the hydrogen abstraction in NEC to generate NEC radicals, followed by in situ additions of the radicals to the nanoparticles. The resulting NEC-CDots were characterized by microscopy and spectroscopy techniques including quantitative proton and 13C NMR methods. The optical spectroscopic properties of the dot sample were found to be largely the same as those of CDots from other organic functionalization schemes. The high structural stability of NEC-CDots benefiting from the radical addition functionalization is highlighted and discussed. Full article
(This article belongs to the Special Issue Advanced Carbon Based Nanomaterials)
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15 pages, 4699 KiB  
Article
Brewer’s Spent Grain Biochar: Grinding Method Matters
by Arvind K. Bhakta, Youssef Snoussi, Mohamed El Garah, Souad Ammar and Mohamed M. Chehimi
C 2022, 8(3), 46; https://0-doi-org.brum.beds.ac.uk/10.3390/c8030046 - 15 Sep 2022
Cited by 4 | Viewed by 2225
Abstract
The present work is based on the principle of biomass waste valorization. Brewer’s spent grains (BSG) come from breweries as by-products. Their huge amount of production on an industrial scale should focus our attention on their valorization, which creates challenges as well as [...] Read more.
The present work is based on the principle of biomass waste valorization. Brewer’s spent grains (BSG) come from breweries as by-products. Their huge amount of production on an industrial scale should focus our attention on their valorization, which creates challenges as well as opportunities. One way to valorize BSG by-products is to convert them into biochar, a functional material with multiple potential applications. With an emphasis on sustainable development and the circular economy, in this work, we focused on a comparative study of the different mechanical processes of BSG grinding and their effect on the resulting biochar formed after pyrolysis. Home appliances such as blenders, coffee mills, and mortar and pestles were used for this purpose. FESEM images confirmed the successful creation of five different morphologies from the same BSG under the same pyrolysis conditions. Interestingly, a novel Chinese tea leaf egg-like biochar was also formed. It was found that a series of physical pretreatments of the biomass resulted in the reduced roughness of the biochar surface, i.e., they became smoother, thus negatively affecting the quality of the biochar. XRD revealed that the biomass physical treatments were also reflected in the crystallinity of some biochar. Via a Raman study, we witnessed the effect of mechanical pressure on the biomass for affecting the biochar features through pressure-induced modifications of the biomass’s internal structure. This induced enhanced biochar graphitization. This is a good example of the role of mechanochemistry. DSC revealed the thermochemical transformation of the five samples to be exothermic reactions. This study opens up an interesting possibility for the synthesis of biochar with controlled morphology, crystallinity, degree of graphitization, and heat capacity. Full article
(This article belongs to the Special Issue Advanced Carbon Based Nanomaterials)
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