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Search: onr:"swepub:oai:DiVA.org:kth-304294" > The role of oxidati...

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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004930naa a2200517 4500
001oai:DiVA.org:kth-304294
003SwePub
008211101s2021 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3042942 URI
0247 a https://doi.org/10.1016/j.carbon.2021.07.0112 DOI
040 a (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Chernova, E. A.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.4 aut
2451 0a The role of oxidation level in mass-transport properties and dehumidification performance of graphene oxide membranes
264 1b Elsevier BV,c 2021
338 a print2 rdacarrier
500 a QC 20211101
520 a Here we report on gas and vapor transport properties of ultra-thin graphene oxide (GO) membranes, with various C:O ratios. Graphene oxide nanosheets with an average lateral size of 800 nm and C:O ratio ranging from 2.11 to 1.81 have been obtained using improved Hummers' method by variation of graphite:KMnO4 ratio. Thin-film selective layers based on the obtained graphene oxide have been spin-coated onto porous substrates. To extend the C:O range to 2.60, thermal reduction of GO membranes was applied. A decrease in C:O ratio leads to significant water vapor permeance growth to over 60 m(3)(STP).m(-2).bar(-1).h(-1) while the permeance towards permanent gases reduces slightly. According to the permeation and sorption measurements, a decisive role of H2O diffusivity has been established, while the water sorption capacity of the graphene oxide stays nearly independent of C:O ratio in GO. The result is supported by semi-empirical modeling which reveals diminution of H2O jump activation barriers with both increasing GO interlayer spacing and its oxidation degree. The height of the activation barriers was found to vary up to an order of magnitude within the entire range of relative humidity (0-100% RH), lowering significantly for strongly oxidized GO. Our results evidence the necessity of attaining maximum GO oxidation degree for improving water transport in GO, especially at low partial pressures.
650 7a NATURVETENSKAPx Kemix Materialkemi0 (SwePub)104032 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciencesx Materials Chemistry0 (SwePub)104032 hsv//eng
650 7a NATURVETENSKAPx Kemix Fysikalisk kemi0 (SwePub)104022 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciencesx Physical Chemistry0 (SwePub)104022 hsv//eng
650 7a NATURVETENSKAPx Fysikx Den kondenserade materiens fysik0 (SwePub)103042 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Condensed Matter Physics0 (SwePub)103042 hsv//eng
653 a Graphene oxide membranes
653 a Graphene oxide oxidation degree
653 a Air dehumidification
653 a Vapor transport
653 a Labyrinthine transport
7001 a Petukhov, D. I.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.;Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia.4 aut
7001 a Chumakov, A. P.u DESY Deutsch Elekt Synchrotron, Notkestr 85, D-22607 Hamburg, Germany.4 aut
7001 a Kirianova, A. V.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.4 aut
7001 a Sadilov, I. S.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.4 aut
7001 a Kapitanova, O. O.u Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia.4 aut
7001 a Boytsova, O. V.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.;RAS, Kurnakov Inst Gen & Inorgan Chem, Leninsky Ave 31, Moscow 119991, Russia.4 aut
7001 a Valeev, R. G.u Russian Acad Sci UdmFRC UB RAS, Udmurt Fed Res Ctr, Ural Brunch, St Them Tatiana Baramzina 34, Izhevsk 426067, Russia.4 aut
7001 a Roth, Stephan V.u KTH,Biokompositer,DESY Deutsch Elekt Synchrotron, Notkestr 85, D-22607 Hamburg, Germany.4 aut0 (Swepub:kth)u1b0mjzr
7001 a Eliseev, Ar A.u Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia.4 aut
7001 a Eliseev, An A.u Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.4 aut
7102 a Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.b Lomonosov Moscow State Univ, Dept Mat Sci, 1-73 Leninskiye Gory, Moscow 119991, Russia.;Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia.4 org
7730 t Carbond : Elsevier BVg 183, s. 404-414q 183<404-414x 0008-6223x 1873-3891
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-304294
8564 8u https://doi.org/10.1016/j.carbon.2021.07.011

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