Synthesis, structure and adsorption properties of nonstoichiometric carbon nitride in comparison with nitrogen-containing carbons

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Nataliya D. Shcherban, Svitlana M. Filonenko, Pavel S. Yaremov, Mykola Skoryk, Vladimir G. Ilyin, Atte Aho, Dmitry Yu. Murzin
Publiceringsår: 2016
Tidskrift: Journal of Industrial and Engineering Chemistry
Volym: 34
Artikelns första sida, sidnummer: 292
Artikelns sista sida, sidnummer: 299
eISSN: 1876-794X


Abstrakt

The samples of nonstoichiometric carbon nitride characterized by spatial ordering, large pore volume (up to 0.8 cm3/g) and specific surface area (up to 585 m2/g) were obtained via matrix carbonization of ethylenediamine in the presence of carbon tetrachloride in mesoporous molecular sieves KIT-6 and MCF as exotemplates. In contrast to nitrogen-containing carbons (obtained by modification of carbon samples with nitrogen in the result of compatible thermal treatment of the initial porous carbon with melamine) nonstoichiometric carbon nitride contains much more nitrogen (up to 13.7 wt.% (C/N = 6), compared with preceding 0.6 wt.%) and increased the quantity of basic nitrogen-containing groups (in particular, amino groups)—up to 0.68 mmol/g (vs. 0.46 mmol/g). The increase of adsorption capacity towards hydrogen and carbon dioxide: adsorption potential, differential heat of CO2 adsorption, specific adsorption on the pore surface—from 5.4 to 7.3 μmol H2/m2 and from 2.2 to 5.4 μmol CO2/m2 for carbon and synthesized samples of nonstoichiometric carbon nitride, respectively, due to the incorporation of nitrogen atoms into the carbon framework was noticed.

Senast uppdaterad 2019-16-10 vid 03:25