Tailoring the Morphology of Mesoporous Titania Thin Films through Biotemplating with Nanocrystalline Cellulose

0439792 - ÚFCH JH 2015 RIV US eng J - Článek v odborném periodiku
Ivanova, A. - Fattakhova-Rohlfing, D. - Kayaalp, B. E. - Rathouský, Jiří - Bein, T.
Tailoring the Morphology of Mesoporous Titania Thin Films through Biotemplating with Nanocrystalline Cellulose.
Journal of the American Chemical Society. Roč. 136, č. 16 (2014), s. 5930-5937. ISSN 0002-7863. E-ISSN 1520-5126
Grant ostatní: AVČR(CZ) CZ12-DE02/2013-2014
Institucionální podpora: RVO:61388955
Klíčová slova: SENSITIZED SOLAR-CELLS * PHOTOCATALYTIC PROPERTIES * POROUS MATERIALS
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 12.113, rok: 2014

The tunable porosity of titania thin films is a key factor for successful applications in photovoltaics, sensing, and photocatalysis. Here, we report on nanocrystalline cellulose (NCC) as a novel shape-persistent templating agent enabling the straightforward synthesis of mesoporous titania thin films. The obtained structures are highly porous anatase morphologies having well-defined, narrow pore size distributions. By varying the titania-to-template ratio, it is possible to tune the surface area, pore size, pore anisotropy, and dimensions of titania crystallites in the films. Moreover, a post-treatment at high humidity and subsequent slow template removal can be used to achieve pore widening; this treatment is also beneficial for the multilayer deposition of thick films. The resulting homogeneous transparent films can be directly spin- or dip- coated on glass, silicon, and transparent conducting oxide (TCO) substrates. The mesoporous titania films show very high activity in the photocatalytic NO conversion and in the degradation of 4-chlorophenol. Furthermore, the films can be successfully applied as anodes in dye-sensitized solar cells.
Trvalý link: http://hdl.handle.net/11104/0242996