From stable aqueous dispersion of carbon nanoparticles to the clusters of metastable Shungite carbonстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Aqueous dispersion of Shungite carbon (ShC) condensation is followed by aggregation of carbon nanoparticles and further net formation. Data obtained by adsorption methods that characterized changes in porosity of natural shungites when transformed into aqueous dispersion and precipitated, were investigated. Pore size distribution determined for natural shungites is characterized by micro- and submesopores of < 0.7-5.0 nm in size predominantly. It correlates with values of basic structural elements (0.4-0.7 nm) releasing into aqueous dispersion and with the primary ShC globular aggregates less than 6.0 nm in size. Decreasing of specific surface and total pore volume while the mean pore radii remains constant, were observed when oxidizing (ozonating) and heating of carbonaceous net. Different stages of ShC nanoparticles aggregation in nature were modeled in laboratory under concentration of stable aqueous dispersion.