Niobium-Doped Titania Nanoparticles: Synthesis and Assembly into Mesoporous Films and Electrical Conductivity

0348369 - ÚFCH JH 2011 RIV US eng J - Journal Article
Liu, Y. - Szeifert, J. M. - Feckl, J. M. - Mandlmeier, B. - Rathouský, Jiří - Heyden, O. - Fattakhova-Rohlfing, D. - Bein, T.
Niobium-Doped Titania Nanoparticles: Synthesis and Assembly into Mesoporous Films and Electrical Conductivity.
ACS Nano. Roč. 4, č. 9 (2010), s. 5373-5381. ISSN 1936-0851. E-ISSN 1936-086X
R&D Projects: GA ČR GA104/08/0435
Institutional research plan: CEZ:AV0Z40400503
Keywords : nanoparticle synthesis * nanoparticle self-assembly * conducting
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 9.855, year: 2010

Crystalline niobium-doped titania nanoparticles were synthesized via solvothermal procedures using tert-butyl alcohol as a novel reaction medium, and their assembly into mesoporous films was investigated. The solvothermal procedure enables the preparation of crystalline doped and undoped nonagglomerated titania nanoparticles, whose size can be controlled from 4 to 15 nm by changing the reaction temperature and time. The anatase lattice of these particles can incorporate more than 20 mol % of Nb ions. The nanoparticles can be easily dispersed at high concentrations in THF to form stable colloidal suspensions and can be assembled into uniform porous mesostructures directed by the commercial Pluronic block copolymer F127. The resulting mesoporous films show a regular mesostructure with ad spacing of about 17 nm, a uniform pore size of about 10 nm with crystalline walls, a high porosity of 43%, and a large surface area of 190 m(2) cm(-3).
Permanent Link: http://hdl.handle.net/11104/0188920