A study on the carbon soot derived from the wood combustion and on the relative alkali-extractable fraction

Arrais, Aldo; Diana, Eliano; Boccaleri, Enrico

doi:10.1007/s10853-006-0511-z

Cited by 18 publications

(15 citation statements)

References 43 publications

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“…The FTIR spectra of GO and the new GOC batch was determined as well, and both nanomaterials showed to be very similar in their oxygen functional groups content ( Figure 2). Following the tentative assignments given in the figure, the most significant difference found between GO and GOC was that the former showed a slightly greater content in ether/alcoxy groups than the latter, which could be related with the increase in the intensity of ν(C-O) stretching modes reported by other authors [29]. The results obtained indicate that the reproducibility in the production of commercial graphene oxide may still have relevant issues, making essential for the end user to confirm that the purchased product matches with the expected characteristics.…”

Section: Int J Mol Sci 2019 20 X For Peer Reviewsupporting

confidence: 63%

Interaction Analysis of Commercial Graphene Oxide Nanoparticles with Unicellular Systems and Biomolecules

Domi

Rumbo

García–Tojal

et al. 2019

IJMS

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The ability of commercial monolayer graphene oxide (GO) and graphene oxide nanocolloids (GOC) to interact with different unicellular systems and biomolecules was studied by analyzing the response of human alveolar carcinoma epithelial cells, the yeast Saccharomyces cerevisiae and the bacteria Vibrio fischeri to the presence of different nanoparticle concentrations, and by studying the binding affinity of different microbial enzymes, like the α-l-rhamnosidase enzyme RhaB1 from the bacteria Lactobacillus plantarum and the AbG β-d-glucosidase from Agrobacterium sp. (strain ATCC 21400). An analysis of cytotoxicity on human epithelial cell line A549, S. cerevisiae (colony forming units, ROS induction, genotoxicity) and V. fischeri (luminescence inhibition) cells determined the potential of both nanoparticle types to damage the selected unicellular systems. Also, the protein binding affinity of the graphene derivatives at different oxidation levels was analyzed. The reported results highlight the variability that can exist in terms of toxicological potential and binding affinity depending on the target organism or protein and the selected nanomaterial.

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Section: Int J Mol Sci 2019 20 X For Peer Reviewsupporting

confidence: 63%

Interaction Analysis of Commercial Graphene Oxide Nanoparticles with Unicellular Systems and Biomolecules

Domi

Rumbo

García–Tojal

et al. 2019

IJMS

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“…Noteworthy, in the 3000-2900 cm −1 spectral range, Raman νCH stretching mode diagnostic peaks account for different C-H aliphatic groups embedded in carbon substrates. They are related to complex carbonaceous materials, resembling morphologies of humic acid-like substances, where different aliphatic sp 3 C moieties are substituents of different graphitized carbon layered pillars [58]. From all the above considerations, and also from the width of the Raman bands associated to the carbonaceous phases in our spectra, a poor structural order of C particles lying on the crocidolite surface can be suggested.…”

Section: Discussionmentioning

confidence: 55%

“…Actually, the D and G bands showed a narrower shape, lying at 1332 and 1582 cm −1 , with the G band lying at lower wavenumbers and characterized by higher intensity than the D band. Nevertheless, a certain degree of disorder could yet be hypothesized by the presence of the satellite D band at 1613 cm −1 and by the weak CH-aliphatic broad band at 2914 cm −1 [58]. The band lying at 3235 cm −1 , harmonic 2D band [51], is peculiar for carbonaceous materials on amosite, and the three bands at 3613, 3635 and 3650 cm −1 are assigned to crystalline stretching vibrations of OH − groups, values matching with the data reported in Bard et al, 1997, and Lewis et al, 1996 [61,62].…”

Section: Discussionmentioning

confidence: 99%

Raman Micro-Spectroscopy Identifies Carbonaceous Particles Lying on the Surface of Crocidolite, Amosite, and Chrysotile Fibers

2018

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Micro-Raman spectroscopy has been applied on UICC (Union for International Cancer Control's) crocidolite and amosite from South Africa and on UICC chrysotile from Canada. Under Optical Microscope (OM), the surface of the fibers was often characterized by areas, micrometric in size, appearing dark. The laser beam was successively focused on areas of the same sample showing different optical contrasts. On the bright zones, Raman spectra peculiar for crocidolite, amosite or chrysotile were recorded. When dark areas were optically identified, the laser beam was addressed onto these regions and, in the Raman patterns, in addition to the bands produced by the mineral fiber, bands ascribing to substituted carbonaceous phases were observed. These bands were lying in the 4000-1100 cm −1 spectral range. On the basis of the shape of the bands and their relative intensities, suggestions about the order-disorder of the carbonaceous particles could be proposed, and they appeared more ordered on amosite than on crocidolite and chrysotile. From the exposed data, crocidolite and amosite fibers from South Africa, and chrysotile fibers from Canada, largely used in industry in the past, are characterized by many carbonaceous micrometric particles, lying on the fiber surfaces. Based on the noxiousness of the carbon particles on human health, their presence on asbestos fibers may play a role in increasing the carcinogenic effects of the analyzed fibrous minerals.

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“…1 and 2 presents multiple absorption peaks of various chemical bonds. The strongest peak in both spectra, set at approximately 3445 cm −1 , is indicative of ubiquitous O-H stretches [50][51][52]. Besides, both spectra present several peculiar absorption peaks at 2875-2957 cm −1 (symmetric and anti-symmetric stretching vibrations of CH 2 ) [51,52], at approximately 1629 and 1440 cm −1 (C=C, skeletal vibrations of unoxidized graphitic domains) [51,53], at approximately 1387 cm −1 (the stretching vibration of C-O of carboxylic acid) [52] and at 1053 cm −1 (alkoxy C-O stretching vibration) [52][53][54].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Few-Layer Graphene by Pulsed Discharge in Graphite Micro-Flake Suspension

et al. 2019

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Few-layer graphene nanosheets were produced by pulsed discharge in graphite micro-flake suspension at room temperature. In this study, the discharging current and voltage data were recorded for the analysis of the pulsed discharge processes. The as-prepared samples were recovered and characterized by various techniques, such as TEM, SEM, Raman, XRD, XPS, FT-IR, etc. The presence of few-layer graphene (3–9 L) in micrometer scale was confirmed. In addition, it is investigated that the size of recovered graphene nanosheets are influenced by the initial size of utilized graphite micro-flake powder. Based on the process of pulsed discharge and our experimental results, the formation mechanism of few-layer graphene was discussed. The influence of charging voltage on as-prepared samples is also investigated.

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A study on the carbon soot derived from the wood combustion and on the relative alkali-extractable fraction

Cited by 18 publications

References 43 publications

Interaction Analysis of Commercial Graphene Oxide Nanoparticles with Unicellular Systems and Biomolecules

Interaction Analysis of Commercial Graphene Oxide Nanoparticles with Unicellular Systems and Biomolecules

Raman Micro-Spectroscopy Identifies Carbonaceous Particles Lying on the Surface of Crocidolite, Amosite, and Chrysotile Fibers

Preparation of Few-Layer Graphene by Pulsed Discharge in Graphite Micro-Flake Suspension

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