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Titania Nano-network Film Templated from Microphase-separated Block Copolymer and its Photocatalysis in Fractured Form

Published online by Cambridge University Press:  01 June 2005

Shih-Yuan Lu ,
Chia-Hao Chang ,
Chi-Hsien Yu ,
Hsin-Lung Chen  and
Yih Hsing Lo
Shih-Yuan Lu*
Affiliation:
Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu, Taiwan 30043, Republic of China
Chia-Hao Chang
Affiliation:
Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu, Taiwan 30043, Republic of China
Chi-Hsien Yu
Affiliation:
Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu, Taiwan 30043, Republic of China
Hsin-Lung Chen
Affiliation:
Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu, Taiwan 30043, Republic of China
Yih Hsing Lo
Affiliation:
Department of Polymerization Catalysis and Engineering, Union Chemical Laboratories, ITRI, Hsin-Chu, Taiwan 300, Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A thin-frame nano-network film of titania with backbone diameter of 20–30 nm was obtained from precursor templating of nano-porous polymer with nano-channels 50 nm in width. The nano-porous polymer templates were prepared by selective removal of the polyisoprene (PI) domain with ozone from the bicontinuous structure formed through blending a symmetric polystyrene-block-polyisoprene (PS-b-PI) copolymer with a PS homopolymer (h-PS). The titania network possessed the preferred anatase crystallinity for photocatalytic applications and a specific surface area of 53 m2/g, comparable to that of Degussa P25, a widely used commercial photocatalyst. Photocatalytic performance of the fractured titania network film was also comparable to that of Degussa P25 in both gas-phase NO oxidation and liquid phase methylene blue degradation. The much larger overall structure size of the fractured titania network film, however, offers advantages over the nano-particulate form of P25, namely, easy handling and rapid recycling from treated streams.

Keywords

CatalyticInfiltrationMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 6 , June 2005 , pp. 1523 - 1528
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1Sopajaree, K., Qasim, S.A., Basak, S. and Rajeshwar, K.: An integrated flow reactor-membrane filtration system for heterogeneous photocatalysis. Part I: Experiments and modelling of a batch-recirculated photoreactor. J. Appl. Electrochem. 29, 533 (1999).CrossRefGoogle Scholar
2Caruso, R.A., Giersig, M., Willig, F. and Antonietti, M.: Porous “coral-like” TiO2 structures produced by templating polymer gels. Langmuir 14, 6333 (1998).CrossRefGoogle Scholar
3Caruso, R.A. and Schattka, H.: Cellulose acetate templates for porous inorganic network fabrication. Adv. Mater. 12, 1921 (2000).3.0.CO;2-B>CrossRefGoogle Scholar
4Breulmann, M., Davis, S.A., Mann, S., Hentze, H-P. and Antonietti, M.: Polymer-gel templating of porous inorganic macro-structures using nanoparticle building blocks. Adv. Mater. 12, 502 (2000).3.0.CO;2-#>CrossRefGoogle Scholar
5Caruso, R.A., Antonietti, M., Giersig, M., Hentze, H-P. and Jia, J.: Modification of TiO2 network structures using a polymer gel coating technique. Chem. Mater. 13, 1114 (2001).CrossRefGoogle Scholar
6Schattka, J.H., Shchukin, D.G., Jia, J., Antonietti, M. and Caruso, R.A.: Photocatalytic activities of porous titania and titania/zirconia structures formed by using a polymer gel templating. Chem. Mater. 14, 5103 (2002).CrossRefGoogle Scholar
7Shchukin, D.G. and Caruso, R.A.: Inorganic macroporous films from preformed nanoparticles and membrane templates: Synthesis and investigation of photocatalytic and photoelectrochemical properties. Adv. Funct. Mater. 13, 789 (2003).CrossRefGoogle Scholar
8Shchukin, D.G., Schattka, J.H., Antonietti, M. and Caruso, R.A.: Photocatalytic properties of porous metal oxide networks formed by nanoparticle infiltration in a polymer gel template. J. Phys. Chem. B 107, 952 (2003).CrossRefGoogle Scholar
9Meyer, U., Larsson, A., Hentze, H-P. and Caruso, R.A.: Templating of porous polymeric beads to form porous silica and titania spheres. Adv. Mater. 14, 1768 (2002).3.0.CO;2-0>CrossRefGoogle Scholar
10Arabatzis, I.M. and Falaras, P.: Synthesis of porous nanocrystalline TiO2 foam. Nano Lett. 3, 249 (2003).CrossRefGoogle Scholar
11Yang, D., Qi, L. and Ma, J.: Eggshell membrane templating of hierarchically ordered macroporous networks composed of TiO2 tubes. Adv. Mater. 14, 1543 (2002).3.0.CO;2-B>CrossRefGoogle Scholar
12Hashimoto, T., Tsutsumi, K. and Funaki, Y.: Nanoprocessing based on bicontinuous microdomains of block copolymers: Nanochannels coated with metals. Langmuir 13, 6869 (1997).CrossRefGoogle Scholar
13Chan, V.Z-H., Hoffman, J., Lee, V.Y., Iatrou, H., Averopoulos, A., Hadjichristidis, N., Miller, R.D. and Thomas, E.L.: Ordered bicontinuous nanoporous and nanorelief ceramic films from self assembling polymer precursors. Science 286, 1716 (1999).CrossRefGoogle ScholarPubMed
14Matsen, M.W. and Bates, F.S.: Unifying weak- and strong-segregation block copolymer theories. Macromoecules 29, 1091 (1996).CrossRefGoogle Scholar
15Leaustic, A., Babonneau, F. and Livage, J.: Structural investigation of the hydrolysis-condensation process of titanium alkoxides Ti(OR)4 (OR - OPr-iso, OEt) modified by acetylacetone. 2. From the modified precursor to the colloids. Chem. Mater. 1, 248 (1989).CrossRefGoogle Scholar
16Allen, G.C., Dalton, J.S., Janes, P.A., Jones, N.G., Nicholson, J.A. and Hallam, K.R.: Photocatalytic oxidation of NOx gases using TiO2: A surface spectroscopic approach. Environ. Pollut. 120, 415 (2002).Google Scholar