| 摘要 |
PROBLEM TO BE SOLVED: To provide titanium dioxide microparticles which exhibit higher photocatalysis than the conventional upon being irradiated with visible rays and develop photocatalysis excellent in stability and persistence and to provide a method for producing the same. SOLUTION: The titanium microparticles are obtained by heat-treating titanium dioxide microparticles as a raw material at 500 to 620°C in a reducing gas atmosphere containing a nitrogen-containing gas and are microparticles having a titanium dioxide component content of at least 80 wt.%, and doped with at least two types of anions containing at least 50 ppm of each of at least nitrogen and carbon, and exhibiting isopropanol oxidation activity upon being irradiated with visible rays at a wavelength of 400 to 600 nm. COPYRIGHT: (C)2005,JPO&NCIPI
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