C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 23/04 (2006.01) A61L 9/18 (2006.01) B01J 21/06 (2006.01) B01J 35/00 (2006.01) C01G 23/047 (2006.01) C01G 23/053 (2006.01)
Patent
CA 2311980
There are provided titanium oxide, which exhibits a superior photocatalytic activity through irradiation of a visible light as well as an ultraviolet light; a photocatalyst comprising said titanium oxide; and a photocatalytic coating agent comprising said photocatlyst and a solvent, wherein said titanium oxide has a value of an index X1 calculated by the following equation (I) of not more than about 0.90, and a value of an index Y1 calculated by the following equation (II) of not less than about 0.075, X1 = B1/A1 (I) Y1 = D1/C1 (II) wherein, as to the equation (I), A1 and B1 stand for respective half-widths of peaks, which are obtained by the process consisting of the steps: (i) analyzing titanium oxide eight times according to an X-ray photoelectron spectroscopy, (ii) obtaining an integrated spectrum of an electron state of titanium with respect to the above first analysis and the second analysis, (iii) obtaining a half-width, A1, of a peak within a binding energy range of from 458 eV to 460 eV with respect to the integrated spectrum obtained in the above step (ii), and (iv) carrying out the same steps as the above steps (ii) and (iii) with respect to the above seventh analysis and the eighth analysis to obtain a half-width, B1, of a peak, and as to the equation (II), C1 stands for an integrated value of absorbance within a wavelength range of from 250 nm to 550 nm in measurement of an ultraviolet-visible diffuse reflection spectrum of titanium oxide, and D1 stands for an integrated value of absorbance of titanium oxide within a wavelength range of from 400 nm to 550 nm.
Koike Hironobu
Sakatani Yoshiaki
Takeuchi Yoshiaki
Fetherstonhaugh & Co.
Sumitomo Chemical Co. Ltd.
Sumitomo Chemical Company Limited
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