Papers by Oxana Vasilievna Kharissova
InTech eBooks, Feb 3, 2016
Available data on catalytic applications of the iron-containing nanomaterials are reviewed. Main ... more Available data on catalytic applications of the iron-containing nanomaterials are reviewed. Main synthesis methods of nZVI, nano-sized iron oxides and hydroxides, core-shell and alloy structures, ferrites, iron-containing supported forms, and composites are described. Supported structures include those coated and on the basis of polymers or inert inorganic materials (i.e., carbon, titania or silica). Description of catalytic processes includes the decomposition reactions (in particular photocatalytic processes), reactions of dehydrogenation, oxidation, alkylation, CC coupling, among a series of other processes. Certain attention is paid to magnetic recovery of catalysts from reaction systems and their reuse up to several runs almost without loss of catalytic activity.
InTech eBooks, Nov 7, 2012
Polymers, May 1, 2020
Several important synthesis pathways for metal-organic frameworks (MOFs) were applied to determin... more Several important synthesis pathways for metal-organic frameworks (MOFs) were applied to determine how the synthesis methods and conditions affect the structure and adsorption capacity of the resulting samples. In the present work, three different synthesis routes were used to obtain copper trimesinate coordination polymer: Slow evaporation (A), solvothermal synthesis using a polyethylene glycol (PEG-1500) modulator (B), and green synthesis in water (C). This MOF was characterized by elemental analysis, infrared spectrometry, X-ray diffraction, scanning electron microscopy, thermogravimetry and volumetric nitrogen adsorption/desorption. The samples have permanent porosity and a microporous structure with a large surface area corresponding to the adsorption type I. The obtained MOF was tested as a sorbent to remove organic dyes methylene blue (МB), Congo red (CR) and methyl violet (MV) as examples. Dye adsorption followed pseudo-first-order kinetics. The equilibrium data were fitted to the Langmuir and Freundlich isotherm models, and the isotherm constants were determined. Thermodynamic parameters, such as changes in the free energy of adsorption (∆G 0), enthalpy (∆H 0), and entropy (∆S 0), were calculated. Thermolysis of copper trimesinate leads to the formation of carbon materials Cu@C with a high purity.
InTech eBooks, Oct 5, 2016
Recent achievements in the area of formation of carbon nanotubes (CNTs), nanocomposites, with cem... more Recent achievements in the area of formation of carbon nanotubes (CNTs), nanocomposites, with cement are reviewed. The peculiarities of dispersion of CNTs in cementitious matrices are discussed, paying major attention to the CNT diameter, length and length-to-diameter ratio, concentration, functionalization, annealing, combination with other nanomaterials, and water-cement ratio. Several effects upon dispersion of carbon allotropes in concrete-water media are emphasized. It is also pointed out that the health impact should also be considered in further experiments on construction materials reinforced with CNTs.
InTech eBooks, Feb 14, 2011
Revista Cubana de Química, 2010
Synthesis) of) carbon) nanofibers) by) thermal decomposition of carbon disulfide and study of the... more Synthesis) of) carbon) nanofibers) by) thermal decomposition of carbon disulfide and study of their properties and electric transport as function of temperature is reported. Carbon disulfide is used as a precursor; three combinations of iron and silver were used as catalysts. When iron is used as a catalyst, an anomaly in the R(T) characteristics is observed at about 0 o C due to the absorption of water molecules in carbon nanofibers. Morphology of carbon nanofibers by Atomic Force Microscopy (AFM) is studied.
Applied Sciences
Currently, among the various areas of targeted wastewater treatment, great attention is being giv... more Currently, among the various areas of targeted wastewater treatment, great attention is being given by researchers to the solid-phase extraction of organic dyes using metal–organic frameworks (MOFs). In this work, a mixed-ligand Zr-MOF containing terephthalic acid and 1,10-phenanthroline as linkers was used for this purpose. The limiting adsorption of the dyes Congo red and methylene blue, according to experimental data, is 40 mg/g. The influence of various parameters (time, temperature, adsorbent dosage, pH, and coexisting ions) on adsorption characteristics was studied. The sorbent was tested for the removal of dyes from drinks in water and in artificial seawater. The possibility of the separation of dyes by column chromatography using a sorbent as a filler was studied.
Frontiers in Environmental Science
Here, we report the chemical composition and optical properties of the fine particles (PM2.5) and... more Here, we report the chemical composition and optical properties of the fine particles (PM2.5) and water-soluble organic carbon (WSOC) of these particles. Additionally, the potential sources of WSOC emission were determined through the study on fluorescence excitation–emission matrix spectra and parallel factor analysis (EEM-PARAFAC). Samples were collected in an urban site of the Monterrey Metropolitan Area in Mexico during summer and winter and characterized using attenuated total reflectance-Fourier-transform infrared spectroscopy (ATR-FTIR), ultraviolet-visible-near infrared-diffuse reflectance spectroscopy (UV–Vis-NIR-DRS), fluorescence spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) techniques. The ATR-FTIR analyses allowed the identification of inorganic ions (e.g., CO32−, SO42−, and NO3−), organic functional groups [e.g., carbonyls (C=O), organic hydroxyl (C-OH), carboxylic acid (COOH)], and aromatic and unsaturated aliphatic hydrocarbons. Th...
International Journal of Engineering Research and Science, 2017
Carbon 3D structures were obtained by spray pyrolysis using toluene solution containing suspended... more Carbon 3D structures were obtained by spray pyrolysis using toluene solution containing suspended nickel or magnesium phthalocyanines as precursors of metallic particles serving as catalysts for carbon phase formation. The process was conducted in a range of temperatures in a quartz tube in inert atmosphere on borosilicate glass supports where the nanometric layers of nanoparticles were deposited. The samples were analyzed by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Infrared Spectroscopy Fourier Transform (FTIR) and Raman spectroscopy; their condusctivity was measured via Kelvin technique. The properties of formed nanolayers were analyzed according to metal nature in the phthalocyanine, temperature, carrier gas speed, and other process parameters. Possible MEMS applications of thus fabricated nanolayers are discussed.
Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2009
The electrochemical behavior of tetra-15-crown-substituted phthalocyanine and its copper and coba... more The electrochemical behavior of tetra-15-crown-substituted phthalocyanine and its copper and cobalt complexes in solution have been studied by voltammetric techniques in wide range of potentials. It is established that the ligand undergoes an irreversible oxidation process, as well as its copper and cobalt complexes. The necessary correlations between electrochemical properties and structures of the ligand and its complexes are proposed.
Industrial & Engineering Chemistry Research, 2019
Table S1. Applications of carbon aerogels as materials for supercapacitors. System (precursors) R... more Table S1. Applications of carbon aerogels as materials for supercapacitors. System (precursors) Reaction conditions / main steps Final product Specific capacitance (F/g) Ref. Bamboo fibers Dissolution in urea/NaOH solution in cold (-12 o C), freeze-drying at-85 o C, calcination at 700-1000 o C, activation with KOH solution. Active carbon fiber aerogel 381 1 Cellulose (cotton linter) Stirring in the solution of NaOH/urea/H2O at −12 • C, freeze-drying at-58 o C, CO2 activation at 200-800 o C. CO2 activated carbon aerogel 328 2 Commercial cotton Heating at 800°C in N2, activation with KOH at 800 o C, washing with HCl. Activated Carbon Fiber Aerogel 283 3 Raw cotton Dissolution of 2-methylimidazole (H-mim) and Zn(NO3)2•6H2O in methanol, addition of cotton to H-mim, addition of Zn salt, drying and carbonization at 900 o C. N-doped porous carbon fiber aerogel 365 4 Lignin powder Preparation of frozen droplets of lignin solution in liquid N2, freeze-drying, carbonization at 900 o C.
Nanosystems: Physics, Chemistry, Mathematics, 2016
In this work, multiwall carbon nanotubes (MWCNT) were functionalized with silver nanoparticles us... more In this work, multiwall carbon nanotubes (MWCNT) were functionalized with silver nanoparticles using two different methods of incorporation. Characterization of these composites was done using Raman spectroscopy and Transmission Electron Microscopy (TEM) and the antibacterial properties were measured using method of dilution and plating. The four-point probe method was used to measure the resistivity of the nanocomposite thin films made via the spin coating method.
Advanced Catalytic Materials - Photocatalysis and Other Current Trends, 2016
Available data on catalytic applications of the iron-containing nanomaterials are reviewed. Main ... more Available data on catalytic applications of the iron-containing nanomaterials are reviewed. Main synthesis methods of nZVI, nano-sized iron oxides and hydroxides, core-shell and alloy structures, ferrites, iron-containing supported forms, and composites are described. Supported structures include those coated and on the basis of polymers or inert inorganic materials (i.e., carbon, titania or silica). Description of catalytic processes includes the decomposition reactions (in particular photocatalytic processes), reactions of dehydrogenation, oxidation, alkylation, CC coupling, among a series of other processes. Certain attention is paid to magnetic recovery of catalysts from reaction systems and their reuse up to several runs almost without loss of catalytic activity.
The Open Inorganic Chemistry Journal, 2008
Synthesis, structure, properties, main reactions, and applications of graphenes are reviewed. It ... more Synthesis, structure, properties, main reactions, and applications of graphenes are reviewed. It is shown that these compounds possess unique properties, which can be successfully used for a series of applications, mainly as nanodevices and composite materials.
Synthesis) of) carbon) nanofibers) by) thermal decomposition of carbon disulfide and study of the... more Synthesis) of) carbon) nanofibers) by) thermal decomposition of carbon disulfide and study of their properties and electric transport as function of temperature is reported. Carbon disulfide is used as a precursor; three combinations of iron and silver were used as catalysts. When iron is used as a catalyst, an anomaly in the R(T) characteristics is observed at about 0 o C due to the absorption of water molecules in carbon nanofibers. Morphology of carbon nanofibers by Atomic Force Microscopy (AFM) is studied.
MRS Proceedings, 2012
ABSTRACTElemental bismuth nanoparticles and nanotubes were obtained via microwave hydrothermal sy... more ABSTRACTElemental bismuth nanoparticles and nanotubes were obtained via microwave hydrothermal synthesis starting from bismuth oxide (Bi2O3) in the range of temperatures 200-220oC for 10-45 min. The formed nanostructures were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Relationship between reaction parameters and shape of the formed nanostructures is discussed.
MRS Proceedings, 2002
ABSTRACTThis work is devoted to microwave heating of graphite for studying the processing of carb... more ABSTRACTThis work is devoted to microwave heating of graphite for studying the processing of carbon nanotubes (CNTs) by graphite vaporization. We have applied heating by microwaves (MW) (power 800W, frequency 2.45 GHz) in air at 20–90 min. The oven temperature was approximately 1200°C. The condensed material was collected on a fused silica target. After deposition, the morphology of carbon nanotubes was studied by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and Transmission Electron Microscopy (TEM). The samples were found to contain nanotubes, nanoparticles and fibers (at 1.30–2.80 micrometers to 6–11 micrometers) which appeared to be highly graphitized. It was observed that multi-walled nanotubes (MWNT's) were produced by this method.
Journal of Chemistry, 2013
Physical properties of automotive acrylic paint are improved by incorporation of three different ... more Physical properties of automotive acrylic paint are improved by incorporation of three different types of carbon nanotubes: single-wall carbon nanotubes (SWCNTs), OH-functionalized single-wall carbon nanotubes (OH-SWCNTs), and aniline-functionalized single-wall carbon nanotubes (aniline-SWCNTs). The formed composites are studied by electron miscroscopy methods and Raman spectrometry. It is found that the acrylic paints with addition of OH-SWCNTs and aniline-SWCNTs show better quality for their applications. In particular, the resistance against degradation by electron beam increased in ~500%.
Industrial & Engineering Chemistry Research, 2010
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Papers by Oxana Vasilievna Kharissova