3D hexagonal (R-3m) mesostructured nanocrystalline titania thin films: Synthesis and characterization

被引：78

作者：

Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ont. M5S 3H6, Canada ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

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]}

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]}

机构：

[1] Materials Chemistry Research Group, Department of Chemistry, University of Toronto, Toronto, Ont. M5S 3H6

[2] X-ray Science Division, Advanced Photon Source (APS), Argonne National Laboratory, Argonne, IL 60439

[3] Oak Ridge National Laboratory (ORNL), Oak Ridge

[4] Xerox Research Centre of Canada, Mississauga, Ont. L5K 2L1

[5] Plastic Additives Research and Technology, Ciba Specialty Chemicals, Tarrytown, NY 10591

来源：

Adv. Funct. Mater. | 2006年 / 13卷 / 1731-1738期

关键词：

D O I：

10.1002/adfm.200500507

中图分类号：

学科分类号：

摘要：

A straightforward and reproducible synthesis of crack-free large-area thin films of 3D hexagonal (R-3m) mesostructured nanocrystalline titania (meso-nc-TiO2) using a Pluronic triblock copolymer (P123)/1-butanol templating system is described. The characterization of the films is achieved using a combination of electron microscopy (high-resolution scanning electron microscopy and scanning transmission electron microscopy), grazing-incidence small-angle X-ray scattering, in situ high-temperature X-ray diffraction, and variable-angle spectroscopic ellipsometry. The mesostructure of the obtained films is found to be based upon a 3D periodic array of large elliptically shaped cages with diameters around 20 nm interconnected by windows of about 5 nm in size. The mesopores of the film calcined at 300°C are very highly ordered, and the titania framework of the film has a crystallinity of 40 % being composed of 5.8 nm sized anatase crystallites. The film displays high thermal stability in that the collapse of the pore architecture is incomplete even at 600°C. The accessible surface area of 3D hexagonal meso-nc-TiO2 estimated by the absorption of methylene blue is nearly twice as large as that of 2D hexagonal meso-nc-TiO2 at the same annealing temperature. © 2006 WILEY-VCH Verlag GmbH & Co.

引用

页码：1731 / 1738

页数：7

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