| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the durability of a photocatalyst powder for purifying environment to be added into organic fibers and others by kneading and others, by making an anionic surfactant exist on an interface between a titanium dioxide fine particle and a porous calcium phosphate coating layer formed on a part of its surface. SOLUTION: In the photocatalyst powder for purifying environment which can purify environment effectively, economically, and safely, a powder, in which a porous calcium phosphate coating layer is formed on a part of the surface of a titanium dioxide fine particle, is prepared, an anionic surfactant is made to exist on the interface between the coating layer and the particle. When the photocatalyst powder is supported on an organic polymer medium such as organic fibers by kneading, embedding, and other means and used, the durability is made able to be improved without deteriorating the medium. The titanium dioxide fine particles to be used are preferably a substance the average particle diameter of the primary particles of which is 0.001-0.2 micron.</p> |
