When a polybasic acid salt containing at least one species selected from the
group consisting of an alkaline earth metal, a transition metal, and Al is caused
to be present on the surfaces of titanium dioxide fine particles, there are obtained
photocatalytic particles and powder exhibiting sufficient photocatalytic properties
when irradiated with light from a light source of low quantity of light. By use
of the photo-functional particles and powder, an organic polymer composition, a
slurry, a coating agent, and a product having a surface exhibiting photocatalytic
property and hydrophilicity are obtained.
