Publications by authors named "V I Gun'ko"
In this study, the adsorption characteristics of novel activated biocarbons prepared from horsetail herb (a popular and troublesome weed) by physical activation (using carbon dioxide) and chemical one (using phosphoric(V) acid) in the process of simultaneous proteins immobilization in multicomponent solutions were examined. The carbon materials were characterized in terms of their porous structure, acidic-basic properties, and surface morphology. The binding mechanisms of such proteins as bovine serum albumin (BSA) and lysozyme (LSZ), differing in internal stability, were determined alone and in their blends.
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- The study examines how the structure of carbon materials affects their ability to adsorb certain cationic dyes, including Basic Violet 3, Basic Red 1, and Basic Blue 9.
- Various techniques, such as scanning electron microscopy and nitrogen adsorption, were used to analyze the carbon's structure and surface properties.
- The results suggest that these carbons are effective adsorbents due to their uniform spherical shape and diverse pore sizes suitable for trapping larger dye molecules.
Interfacial phenomena linked to the behavior of bound water, organic solvents (co-sorbates, dispersion media), hydrogen, methane, acids/bases, and salts bound to various silicas, polymers, and carbon materials were analyzed vs. temperature and concentrations using H NMR spectroscopy, differential scanning calorimetry (DSC) and other methods. The material characteristics were studied using microscopy, infrared spectroscopy (IR), small angle X-ray scattering (SAXS), and nitrogen adsorption.
View Article and Find Full Text PDFIn order to improve the properties and characteristics of rose clay composites with acai, hydroxyapatite (HA), and nanosilica, the systems were mechanically treated. This treatment provides the preparation of better nanostructured composites with natural and synthetic nanomaterials with improved properties. The materials were characterized using XRD, nitrogen adsorption and desorption, particle sizing, zeta potential, and surface charge density measurements.
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- The study explores how the temperature and behavior of concentrated alkali solutions (like NaOH in water) change due to factors like surface structure and hydrophilicity of materials, specifically nanosilicas.
- Experiments were conducted using hydrogen NMR spectroscopy on NaOH and water mixtures on both hydrophilic and hydrophobic nanosilicas to observe the effects under different conditions.
- Results indicated that water and NaOH form distinct clusters influenced by the surface properties of the nanosilicas and the dispersion media, affecting their interfacial properties and hydrogen bond networks.