TiO2 is known as a photocatalytic and hydrophilic
semiconductor material when excited by light. That is why TiO2 is
considered to be a functional material that has the potential to
create self-cleaning materials for practical applications. The
hydrophilic nature of the material surface under optical excitiation
is closely related to the material properties, surface configuration
and stimulus. For this reason, the study on the hydrophilicity of the
material is a very academically attractive subject in studying the
properties as well as physical processes on the surface.
In the world, recent studies show the relationship between the
hydrophilicity of the solid surface and surface energy. Exciation by
light produces a change in surface energy, leading to a change in
hydrophilicity.
The systematic and quantitative study of the changes in
surface energy under the differentiation of TiO2 with different
nano-structures promises to bring further information to the
photocatalytic mechanism and super-hydrophilic effects of TiO2
material.
In Vietnam, there are a few studies related to hydrophilicity or
surface energy of materials, especially hydrophilicity under the
Exciation of the light. Therefore, the objectives of the thesis are
presented as follows