2 edition of Surface areas of graphite regenerated from graphite oxide found in the catalog.
Surface areas of graphite regenerated from graphite oxide
Eugene Justin Vander Zanden
Written in English
|Statement||by Eugene Justine Vander Zanden.|
|The Physical Object|
|Pagination||28 leaves, bound :|
|Number of Pages||28|
The thermal exfoliation and reduction of graphite oxide (GO) is the most commonly used strategy for large-scale preparation of graphene, and the oxidation degree of GO would influence the chemical structure of prepared graphene, thereby affecting its final physical and chemical properties. In addition to serving asCited by: Therefore, you will mearure ca m2/g BET-surface area for graphite oxides, but this is a large underestimation of the surface area of exfoliated graphite oxide: the single graphene oxide.
1. Top Down Method Graphene can be produced by exfoliation of bulk graphite including mechanical cleavage using Scotch tape, direct liquid phase exfoliation of graphite/ graphite intercalation compound with the help of ultrasonication or via oxidation of graphite to graphite oxide (GO), exfoliation of GO to graphene oxide by ultra sonication followed by reduction . Compressed expanded graphite (CEG) blocks produced from expanded graphite (EG) of apparent density of kg m−3 and surface area of 20–40 m2/g, provided by Carbone-Lorraine Group (France.
The Preparation of Graphite Oxide and Reduced Graphene Oxide. Graphite oxides were obtained from scale, flake and synthetic graphites by two methods denoted A and B (commercial graphite powders were ground in a planetary ball mill and sieved to a particle size Cited by: Insufficient bone regeneration is a complex problem affecting millions, and treatment would benefit from a complex material that recapitulates the properties of native bone. No current tissue-engineered scaffold can capture all of the properties of healthy bone. Graphene, graphene oxide (GO), and functional graphenic materials (FGMs) have a variety of interesting Cited by: 4.
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Graduate Thesis Or Dissertation Surface areas of graphite regenerated from graphite oxide Public Deposited. Analytics × Add to Author: Vander Zanden, Eugene Justin.
Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link). Specific surface area as high as m 2 g –1 in the range of the theoretical value for GO has been experimentally measured for diluted GO solutions, but aggregation levels of 15% were estimated for GO concentration of 50 μg mL – by: All the types of graphite that were tested afforded materials with high BET surface areas ranging from m 2 /g to m 2 /g, without intervening an activation stage at elevated temperature.
SEM and TEM images displayed exfoliated structures, where the flakes were significantly detached and by: A sustainable route to produce graphite oxide (GO) is presented using dry ball milling. The production method was based on pristine graphite flakes in a planetary ball mill. The prepared GO was characterized using UV–vis spectroscopy, BET surface area analysis, thermal analysis, SEM-EDX, TEM, XPS, elemental analysis, and Raman spectroscopy.
The degree of graphite Cited by: After acid treating, ball milling and sieving, waste graphite (WG) powder of mesh was obtained, with specific surface area (SSA) of m 2 g −1 and total pore volume of cm 3 g −1. EDS analysis shows that the as-processed WG powder containes wt% of carbon and a small amount of O, Fe, Co and Ni (Table 1).Cited by: 9.
The disappearance of the sharp peak can be attributed to the exfoliation of layered structures of graphite oxide. The broad peak may stem from the partial restacking of exfoliated graphene layers.
C60/rGO hybrids show characteristic peaks of C60 at °, °, °, °, ° and ° corresponding to the (), (), (), ( Graphite oxide fluorinated at °C had the highest surface area. The discharge characteristics and structure changes by fluorination indicate that the optimum fluorination temperatures are in the range of – °C for graphite oxide prepared by the modified Staudenmaier method and at around °C for that prepared by Brodie method.
As far, back as the s, scientists have started studying graphite oxide usage in desalination of water. Insome group of researchers employed the principle of reverse osmosis using GO to achieve the same goal. It was discovered that graphite allows water to pass through but retain some larger ions.
Its narrow mono- or bilayer Author: Raphael Mmaduka Obodo, Ishaq Ahmad, Fabian Ifeanyichukwu Ezema. Oxidation of graphite surface: the role of water D.W. Boukhvalov 1,2 1Department of Chemistry, Hanyang University, 17 Haengdang-dong, Seongdong-gu, SeoulKorea 2Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira Str Ekaterinburg, Russia Based on density functional calculations, we demonstrate a significant Cited by: 4 1 Synthesis, Characterization, and Selected Properties of Graphene >1, it is reported as SLG, and if the ratio is graphite ofFile Size: 2MB.
Graphite foil has high electrical conductivity, low density (1 g/cm 3), well-developed surface, and uniform porous structure formed by slit-like mesopores with characteristic radius of about 20 å and can be used as a support for modified electrodes .
Solvent-Assisted Thermal Reduction of Graphite Oxide. The Journal of Physical Chemistry C(35), DOI: /jp Mykola Seredych and Teresa J. Bandosz. Effects of Surface Features on Adsorption of SO2 on Graphite Oxide Cited by: Graphite oxide, formerly called graphitic oxide or graphitic acid, is a compound of carbon, oxygen, and hydrogen in variable ratios, obtained by treating graphite with strong oxidizers.
The maximally oxidized bulk product is a yellow solid with C:O ratio between andthat retains the layer structure of graphite but with a much larger and irregular spacing.
Graphene oxide (GO), a two-dimensional (2D) carbon nanostructure, has been developed to be an adsorbent of organic pollutants because of the large surface area, and abundant oxygen-containing groups (epoxy, hydroxyl and carboxyl groups),, which can enhance the combination between contaminant and GO.
In addition, GO is liable to construct the 3D Cited by: reduced graphene oxide, as active materials for electrochemical double layer capacitors (EDLCs).
Compared to ordinary graphite, and graphite oxide, rGO have superior capacitive behavior and power output in EDLCs due to their unique nanoporous structure, porosity and enormous BET surface area close to m2g The electrochemical.
One-step exfoliation and reduction of graphite oxide via microwave irradiation. • Effect of pristine graphite (type, flake size) on the microwave expanded material. • Effect of pretreatment and oxidation cycles on the produced expanded material. • Expanded graphene materials with high BET surface areas ( m 2 /g– m 2 /g).
•Cited by: Chapter 7 • Graphene and Graphene Oxide for Tissue Engineering and Regeneration Other Properties and Applications In addition to the above three dominant properties, othe r. Exfoliated graphite was obtained from graphite oxide using thermal exfoliation. Graphite oxide samples were synthesized using modified Hummers method.
The influence of the synthesis process parameters such as heating rate, temperature, exposure time on the properties of graphite oxide were investigated.
The aerogel based on the reduced graphene oxide was also synthesized using the hypophosphorous acid reduction process and I 2 [ 6 ]. He showed a large surface area of m 2 /g.
Typically, the reduction with chemical agents Author: Gudkov Maksim Vladimirovich, Valery Pavlovich Melnikov. In this paper, the influences of the graphite precursor and the oxidation method on the resulting reduced graphene oxide (especially its composition and morphology) are shown. Three types of graphite were used to prepare samples for analysis, and each of the precursors was oxidized by two different methods (all samples were reduced by the same method of thermal reduction).Cited by: Potassium permanganate (KMnO4) has been proved to be an efficient oxidant for converting graphite into graphite oxide, but its slow diffusion in the interlayer of graphite seriously restricts the production of graphene oxide (GO).
Here, we demonstrate that the preoxidation of graphite by impure manganese dioxide (MnO2) in a mixture of concentrated Cited by: Graphene, graphene oxide, and functional graphenic materials comprise a class of materials that can be derived from graphite (pencil lead) and offer a .