Page 593 - Book Hosokawa Nanoparticle Technology Handbook

34 DEVELOPMENT OF PHOTOCATALYST APPLICATIONS

TiO -complex Original aluminosilicate
2

Initial After 6 hours Initial After 6 hours

Figure 34.9
The comparison of bleaching effect of paper with the TiO complex and the original aluminosilicate after 6 h under
2
UV light.

displayed photoendurance on having photocatalysis.
100
It seems that the TiO complex does not decompose
2
5 wt% organic materials, because the TiO photocatalyst
2
TiO -complex inserted on the porous surface of aluminosilicate is
2
80 not directly in contact with a fiber of the paper.
The TiO as a photocatalyst and the porous alumi-
Tensile strength ratio (%) 60 TiO 2 5 wt% with a cationic surfactant. The presence of TiO 2
2
nosilicate were combined in an aqueous solution
nanoparticles, which inserted and uniformly dis-
persed on the porous surface of aluminosilicate, was
observed by TEM–EDS analysis. The TiO complex
-mixture
2
has photocatalysis, and its photocatalytic efficiency
40
was also improved compared with that of TiO mix-
2
ture. On the other hand, the tensile strength of the
paper with the TiO complex did not decrease under
20 2
UV light, although the TiO mixture decreased down
2
to a half of its initial strength. Accordingly, the TiO 2
aluminosilicate complex had photocatalysis without
0 decomposing organic materials.
0 3 6 9 12
Irradiation time (month)
Figure 34.10 References
The tensile strength ratio of the paper with the TiO 2
complex and the TiO mixture under UV light in a fade [1] A. Fujishima, K. Hashimoto and T. Watanabe: TiO 2
2
meter. Photocatalyst, Fundamentals and Applications, BKC,
Inc., Tokyo (1999).
[2] H. Nimura, S. Imaizumi, K. Hayashi and N. Yamashita:
J. Eng. Technol. Ind., 49, 97 (2001).
irradiated on the papers with 20 wt.% of these pow- [3] T. Nonami: J. Odor Res. Eng., 33, 333 (2002).
ders in a fade-meter. The irradiation for 3 weeks in [4] M. Nikaido, S. Furuya and T. Kakui: J. Surf. Finish.
the fade meter is equivalent to a year under ordinary Soc. Jpn., 55, 33 (2004).
sunlight. The tensile strength ratios of papers that are [5] T. Kakui, M. Nikaido and S. Furuya: Proceedings of
represented by the value that tensile strengths were
divided in each initial tensile strength are shown in the 107th Annual Meeting of The American Ceramic
Fig. 34.10. The tensile strength of paper with the Society on CD-ROM (2005).
TiO complex did not decrease, although that with [6] M. Nikaido, S. Furuya, T. Kakui and H. Kamiya: 18th
2
the TiO mixture decreased down to a half of its ini- Fall Meeting of the Ceramic Society of Japan, Preprints,
2
tial strength. The paper containing the TiO complex Osaka, Japan, 376 (2005).
2
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