Synthesis of multifunctional few layers graphenes for different applications

Metal-organic frameworks (MOFs) - attract a lot of interest as potential energy materials, because of their high density and high heat of detonation. The porous crystalline structure attracts attention due to its high specific surface characteristics and the possibility of changing their physicochemical properties by introducing metal centers. A method for synthesizing multilayer graphene oxide frameworks (GOFs) from vegetable wastes such as rice husks or walnut shells has been developed

Some Problems of the Development of Physics and Chemistry of Carbon Materials

Regularities of formation of nanocarbon materials under catalytic thermal pyrolysis of propane-butane on the Kazakhstan natural clays, chromite and bauxite sludges, containing oxides of the iron sub-group metals, are investigated. Morphology and structures of forming carbon threads with metal particles, fixed at the ends of the threads, are studied and formation of divaricate form of carbon threads – octopus – is found out. The process of carbonization is shown at walnut shells, grape and apricot stones and their cell immobilization for selective adsorption of heavy metal ions and sulfur dioxide. Metal-carbon composites considered as adsorbents for waste treatment, catalysts of cracking C3-C4, hydrocarbons and components of refractories with improved characteristics

The Using of Pseudomonas Cells for Bioremediation of Oil Contaminating Soils

The article describes results on the oxidation of crude-oil by bacteria of genus Pseudomonas: Ps. mendocina H-3, Ps. sp. H-7, Ps. stutzeri H-10, Ps. aeruginosa H-14, Ps. alcaligenes H-15 and Ps. sp. H-16. These microorganisms isolated from oil-contaminated soils in Kazakhstan were found to be capable of growing on crude oil components and oxidizing the hydrocarbons to different extent. Therefore, they may be useful for the bioremediation of oil-polluted soils and waters

The Characteristics of Graphene Obtained from Rice Husk and Graphite

In this paper methods for obtaining graphene oxide from rice husk were developed, which using a downward approach based on a four-stage strategy: preliminary carbonization, desilication, activation with KOH, and exfoliation and its comparison with the method of graphite oxidation. The samples were analyzed by elemental analysis, SEM, Raman, TGA and FTIR. The elemental analysis show that the proposed approach allows to produce graphene materials with a carbon content around 70% and rich in inorganic matter (0–20 wt.%) (K, Fe, Si). To remove inorganic contents, purification and functionalization step were applied. The Raman spectra of the samples indicate the presence of a mixture of graphene layers and amorphous carbon. The thermogravimetric profile of samples is characterized by a slowly weight decrease up to a final residue of ~10 wt.%. FTIR spectra are characterized by the typical broad shape of large condensed aromatic carbon bonds; only the peak due to C=C stretching modes and the overlapped peaks between 900 and 1500 cm-1 due to skeleton vibrations are detected

Synthesis of multifunctional few layers graphenes for different applications

Metal-organic frameworks (MOFs) - attract a lot of interest as potential energy materials, because of their high density and high heat of detonation. The porous crystalline structure attracts attention due to its high specific surface characteristics and the possibility of changing their physicochemical properties by introducing metal centers. A method for synthesizing multilayer graphene oxide frameworks (GOFs) from vegetable wastes such as rice husks or walnut shells has been developed