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Premium Quantum Chemical Study of Water Adsorption on the Surfaces of SrTiO 3 Nanotubes
Bandura Andrei V.,
Kuruch Dmitry D.,
Evarestov Robert A.
Publication year2015
Publication title
Resource typeJournals
PublisherWILEY‐VCH Verlag
Abstract We have studied the adsorption of water molecules on the inner and outer surfaces of nanotubes generated by rolling (001) layers of SrTiO 3 cubic crystals. The stability and the atomic and electronic structures of the adsorbed layers are determined by using hybrid density functional theory. The absorption energy and the preferred adsorbate structure are essentially governed by the nature of the surface of the nanotube. Dissociative adsorption prevails on the outer nanotube surfaces. The stability of the adsorbed layers on the inner surfaces is related to the possibility of the formation of hydrogen bonds between water molecules and surface oxygen atoms, and depends on the surface curvature. The presence of water molecules on the inner surface of the nanotubes leads to an increase of the electronic band gap. Externally TiO 2 ‐terminated nanotubes could be used for the photocatalytic decomposition of water by ultraviolet radiation.
Subject(s)adsorption , band gap , carbon nanotube , chemical engineering , chemical physics , chemistry , computational chemistry , density functional theory , engineering , materials science , molecule , nanotechnology , nanotube , optical properties of carbon nanotubes , optoelectronics , organic chemistry , selective chemistry of single walled nanotubes
SCImago Journal Rank1.016

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