Porous carbon-mineral nanocomposites

TEM images of carbon/silica composites of different morphology

Nano/meso/macroporous carbon-mineral composites

A variety of carbon-mineral composites (CMC), especially carbon-nanosilica and carbon nanoparticles bound to various solid matrices was   prepared using different methods. There are CMC with nonporous and strongly porous carbons with the specific surface area of 50-1500 m2/g. The  CMC characteristics are controlled by choice of precursors, reaction and treatment conditions.

There are several types of  composites:

- mechanical mixtures differently treated;

- carbonized organics at a solid surface;

- simultaneous synthesis of carbon precursors (e.g. polymers) and mineral or metallic particles with subsequent carbonization of organics;

- carbons prepared by physical or chemical vapor deposition onto a substrate from the gas phase.

Carbon deposits can represent nonporous nanoparticles (NPNP) that is strong disadvantage for the use of composites as adsorbents; i.e., composites as adsorbents should include porous carbon nanoparticles. NPNP/mineral  composites can be effective fillers of polymeric materials.

The specific surface area and pore volume of CMC can be varied in a wide range of 300-1500 m2/g and 0.5-1.5 cm3/g, respectively. The mineral matrices can include only individual silica or complex oxides based on silica. Carbon deposits can  contain various heteroatoms providing specific surface properties of CMC that is of importance for their application in industry  and for analytical purposes.

Nano/meso/macroporous carbon-mineral composites of various types including porous carbon nanoparticles bound to mineral nanoparticles (fumed nanooxides with silica, alumina, titania or complex nanooxides)  can be prepared as adsorbents for polar and nonpolar compounds of various molecular weights, especially for fast and effective adsorption of toxic gases from air flow and for purification of water from pollutants. Introduction of such heteroatoms as O, N, P, S into carbon phase or metal particles provide additional differentiation of surface properties that is of importance from practical point of view.

Developers:

Faculty of Chemistry; Department of Chromatographic Methods; Maria Curie-Skłodowska University

Chuiko Institute of Surface Chemistry

Contacts: 
Lublin, Poland: http://www.umcs.lublin.pl; Tel.: +48 81 537 55 59; Fax.:+48 81 533 33 48; e-mail: [email protected]; Kyiv, Ukraine: http://www.isc.gov.ua/index.php/en/; Tel.: + 38 (044) 422 96 27; e-mail: [email protected]