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Tuning the electronic and chemisorption properties of hexagonal MgO nanotubes by doping - Theoretical study
Univ Belgrade, Fac Phys Chem, Studentski Trg 12-16, Belgrade 11158, Serbia.;Oberflachentechnol GmbH, CEST Kompetenzzentrum Elektrochem, Viktor Kaplan Str 2,Sect A, A-2700 Wiener Neustadt, Austria..
Univ Belgrade, Fac Phys Chem, Studentski Trg 12-16, Belgrade 11158, Serbia..
Univ Belgrade, Fac Phys Chem, Studentski Trg 12-16, Belgrade 11158, Serbia..ORCID-id: 0000-0002-1000-9784
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap. Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden.;Humboldt Univ, Phys Dept, Zum Grossen Windkanal 6, D-12489 Berlin, Germany..
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2018 (Engelska)Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 457, s. 1158-1166Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Oxide materials offer a wide range of interesting physical and chemical properties. Even more versatile behavior of oxides is seen at the nanoscale, qualifying these materials for a number of applications. In this study we used DFT calculations to investigate the physical and chemical properties of small hexagonal MgO nanotubes of different length. We analyzed the effect of Li, B, C, N, and F doping on the properties of the nanotubes. We find that all dopants favor the edge positions when incorporated into the nanotubes. Doping results in the net magnetization whose value depends on the type of the impurity. Using the CO molecule as a probe, we studied the adsorption properties of pristine and doped MgO nanotubes. Our results show that the dopant sites are also the centers of significantly altered chemical reactivity. While pristine MgO nanotubes adsorb CO weakly, very strong adsorption at the dopant sites (B-, C-, and N-doped nanotubes) or neighboring edge atoms (F- and Li-doped nanotubes) is observed. Our results suggest that impurity engineering in oxide materials can be a promising strategy for the development of novel materials with possible use as selective adsorbents or catalysts.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018. Vol. 457, s. 1158-1166
Nyckelord [en]
Magnesium oxide, Nanotube, Doping, Surface reactivity
Nationell ämneskategori
Materialkemi
Identifikatorer
URN: urn:nbn:se:kth:diva-235098DOI: 10.1016/j.apsusc.2018.07.041ISI: 000441872300136Scopus ID: 2-s2.0-85049745139OAI: oai:DiVA.org:kth-235098DiVA, id: diva2:1249399
Forskningsfinansiär
Vetenskapsrådet, 2014-5993Carl Tryggers stiftelse för vetenskaplig forskning
Anmärkning

QC 20180919

Tillgänglig från: 2018-09-19 Skapad: 2018-09-19 Senast uppdaterad: 2018-09-19Bibliografiskt granskad

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Johansson, BörjeSkorodumova, Natalia

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Pasti, Igor A.Johansson, BörjeSkorodumova, Natalia
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