Приказ основних података о документу

Karakterizacija površinskih kiseoničnih grupa različitih karbonskih materijala Bemovom (Boehm) metodom i temperaturski programiranom desorpcijom

dc.creatorKalijadis, Ana
dc.creatorVukčević, Marija
dc.creatorJovanović, Zoran M.
dc.creatorLaušević, Zoran
dc.creatorLaušević, Mila
dc.date.accessioned2021-03-10T11:29:36Z
dc.date.available2021-03-10T11:29:36Z
dc.date.issued2011
dc.identifier.issn0352-5139
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/1802
dc.description.abstractThe surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N2 adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehm's method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm method. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO2 reduction on the carbon material surface.en
dc.description.abstractIspitivane su površinske osobine različitih karbonskih materijala: aktivnog uglja, karbonskog filca, staklastog ugljenika i poroznog karbon monolita. Specifična površina uzoraka ispitivana je BET metodom, a količina i tip površinskih grupa Bemovim titracijama i temperaturski programiranom desorpcijom (TPD). Poredeći rezultate dobijene BET metodom sa rezultatima TPD-a i Bemove titracije, zaključeno je da broj površinskih grupa nije proporcionalan specifičnoj površini uzoraka. Ukupan broj kiseoničnih grupa kod poroznih uzoraka, dobijen na osnovu TPD-a, je veći nego u slučaju Bemovih titracija. Razlog neslaganja rezultata ovih dveju metoda potiče iz činjenice da je Bemov metod ograničen na određivanje samo kiselih i baznih grupa, dok TPD daje informaciju o ukupnom broju svih kiseoničnih grupa. Takođe, kod Bemovog metoda, postojanje poroznosti može smanjiti rastvoru dostupnu površinu. TPD spektri izdvajanja SO pokazali su nisko-temperaturski maksimum, ispod 650 K, koji potiče od redukcije SO2 na površini karbonskog materijala.sr
dc.publisherSerbian Chemical Society, Belgrade
dc.relationMinistry of Science and Technological Development of the Republic Serbia [151005B, 142002]
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceJournal of the Serbian Chemical Society
dc.subjectcarbon materialsen
dc.subjectsurface oxygen groupsen
dc.subjecttemperature programmed desorptionen
dc.titleCharacterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorptionen
dc.titleKarakterizacija površinskih kiseoničnih grupa različitih karbonskih materijala Bemovom (Boehm) metodom i temperaturski programiranom desorpcijomsr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage768
dc.citation.issue5
dc.citation.other76(5): 757-768
dc.citation.rankM23
dc.citation.spage757
dc.citation.volume76
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/12178/11_4646_4157.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_1802
dc.identifier.scopus2-s2.0-79957459508
dc.identifier.wos000291413700011
dc.type.versionpublishedVersion


Документи

Thumbnail

Овај документ се појављује у следећим колекцијама

Приказ основних података о документу