Investigation of the Morphological, Structural, and Vibrational Behaviour of Graphite Nanoplatelets

Albetran, Hani Manssor

doi:10.1155/2021/5546509

Cited by 8 publications

(13 citation statements)

References 49 publications

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“…Stacked ECNF and GNP XRD spectra are presented in Figure 5 . The ECNF XRD and Rietveld analysis follows on from previous GNPs XRD data [ 32 ]. The strong diffraction peak at a 2θ of ~26.34° (indexed as (002)) and weaker characteristic diffraction peaks (indexed as (020), (111), and (004) planes) indicate either a hexagonal crystal structure for both samples without impurity or second-phase peaks in the graphitic structure (crystallographic carbon planes).…”

Section: Resultsmentioning

confidence: 99%

“…PAN ( M w 150,000 g/mol, 100% pure, Sigma-Aldrich, St. Louis, MO, USA), acetic acid ( M w 60.05 g/mol, 99.7% pure, Sigma-Aldrich), N,N-dimethylformamide, ethanol ( M w 46.07 g/mol, 99.5% pure, Sigma-Aldrich), and GNPs were used. The GNP synthesis has been described previously [ 32 ]; in brief, GNPs were prepared by ultrasonic exfoliation of graphite in a bath (40 kHz, 5 h, room temperature, in 70% isopropyl alcohol and 30% water).…”

Section: Experimental Methodologymentioning

confidence: 99%

“…The GNP XRD data, as described in a previous study [ 32 ], were used. A Rigaku Benchtop Miniflex XRD (λ Cu–Kα 0.1541 nm, 40 kV, 40 mA, 2θ 20–70°, scanning speed 0.02°/min at 5°/min, room temperature) was used to determine the ECNF purity and structure.…”

Section: Experimental Methodologymentioning

confidence: 99%

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Synthesis and Characterization of Electrospun Carbon Nanofibers from Polyacrylonitrile and Graphite Nanoplatelets

Albetran

2023

Materials

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Sol-gel electrospinning process was used to prepare electrospun carbon nanofibers (ECNFs) from polyacrylonitrile and graphite nanoplatelets. The nanofibers of as-electrospun carbon were calcinated in argon from room temperature to 500 °C for 1h. Scanning and transmission electron microscopy with energy-dispersive X-ray spectroscopy and X-ray diffractometry (XRD) were used to characterize the synthesized ECNFs. The smooth ECNFs with a diameter of 129 ± 43 nm comprised conical platelets of 30–200 µm length. The plane-layered nanofibers contained crystallites along the long fiber axis and were mainly parallel.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Methodologymentioning

confidence: 99%

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Synthesis and Characterization of Electrospun Carbon Nanofibers from Polyacrylonitrile and Graphite Nanoplatelets

Albetran

2023

Materials

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“…No second-phase peaks and impurities existed in the crystalline NPs. The average as determined by using Scherrer's equation [ 27 – 29 ] was used to calculate the average NP crystallite sizes ( L ) of the YO-NPs and Ag-NPs as 11.14 and 19.97 nm, respectively. Average particle diameters from TEM images provided comparable crystallite sizes.…”

Section: Resultsmentioning

confidence: 99%

Yttrium Oxide Nanoparticles Moderate the Abnormal Cognitive Behaviors in Male Mice Induced by Silver Nanoparticles

Abu-Taweel

Al-Mutary

Albetran

2022

Oxidative Medicine and Cellular Longevity

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Silver nanoparticles (Ag-NPs) have been used in medical, agricultural, and industrial purposes. Furthermore, NPs can cross the blood-brain barrier and encourage some effects on spatial learning and memory in organism. Here, we investigate the possible neurotoxicity of Ag-NPs with special emphasis on the neuroprotective impacts of yttrium-oxide nanoparticles (YO-NPs) in male mice. Male mice ( n = 24 ) were weekly intraperitoneally injected for 35 days as the following; groups I, II, III, and IV received tap water (control), Ag-NPs (40 mg/kg), YO-NPs (40 mg/kg), and Ag-NPs/YO-NPs (40 mg/kg each), respectively. After that, animals were tested in shuttle box, Morris water-maze, and T-maze devices to evaluate the spatial learning and memory competence. Neurotransmitters and oxidative indices in the forebrain were estimated. According to behavioral studies, the male animals from the Ag-NP group presented worse memory than those in the control group. The biochemical changes after Ag-NP exposure were observed through increasing TBARS levels and decline in oxidative biomarkers (SOD, CAT, GST, and GSH) and neurotransmitters (DOP, SER, and AChE) in the forebrain of male mice compared to untreated animals. Interestingly, the animals treated with mixed doses of Ag-NPs and YO-NPs displayed improvements in behavioral tests, oxidative parameters, and neurotransmitters compared to males treated with Ag-NPs alone. In conclusion, the abnormal behavior related to learning and memory in male mice induced by Ag-NPs was significantly alleviated by YO-NPs. Specifically, the coinjection of YO-NPs with Ag-NPs moderates the disruption in neurotransmitters, oxidative indices of mice brains, which reflects on their cognitive behaviors.

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“…The Scherrer equation was used to calculate the average crystallite size ( D XRD ) of TMOs [ 23 , 24 , 25 ]:

where k , λ , β , and θ are shape factor (0.91), wavelength of the Cu-K α radiation (0.15419 nm), full width at half maximum (FWHM), and the Bragg diffraction angle, respectively.…”

Section: Resultsmentioning

confidence: 99%

Wettability of Nanostructured Transition-Metal Oxide (Al2O3, CeO2, and AlCeO3) Powder Surfaces

et al. 2022

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Wettability has been the focal point of many studies in metal oxide materials due to their applications in water–gas shift reactions, organic reactions, thermochemical water splitting, and photocatalysis. This paper presents the results of systematic experimental studies on the wettability of surfaces of nanostructured transition-metal oxides (TMOs) (Al2O3, CeO2, and AlCeO3). The wettability of nanoparticles was investigated by measuring contact angles of different concentrations of water-based nanofluids (0.05–0.1 wt%) on the glass slide. The morphology, the heterostructure, and the nature of incorporated nanoparticles were confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Characteristic diffraction patterns of the nanomaterials were evaluated using energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) techniques. The contact angles of water–Al2O3, water–CeO2, and water–AlCeO3 were measured as 77.5 ± 5°, 89.8 ± 4°, and 69.2 ± 1°, respectively. This study suggests that AlCeO3 is strongly water-wet (hydrophilic), while CeO2 is weakly water-wet (hydrophobic). It further demonstrated that the sizes and compositions of the nanoparticles are key parameters that influence their wetting behaviors.

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Investigation of the Morphological, Structural, and Vibrational Behaviour of Graphite Nanoplatelets

Cited by 8 publications

References 49 publications

Synthesis and Characterization of Electrospun Carbon Nanofibers from Polyacrylonitrile and Graphite Nanoplatelets

Synthesis and Characterization of Electrospun Carbon Nanofibers from Polyacrylonitrile and Graphite Nanoplatelets

Yttrium Oxide Nanoparticles Moderate the Abnormal Cognitive Behaviors in Male Mice Induced by Silver Nanoparticles

Wettability of Nanostructured Transition-Metal Oxide (Al2O3, CeO2, and AlCeO3) Powder Surfaces

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