Zno Photocatalyst Active In The Visible Light Spectrum

  • Ilya M. Sosnin, Alexey E. Romanov, Anatoly A. Vikarchuk


The article provides the data on the influence of substructure of zinc oxide plate-like microparticles
on their photocatalytic activity in the phenol oxidation reaction when exposed to solar, visible, and ultraviolet
light. Thermal treatment of microparticles in air controls their substructure. It has been shown that an increase
in the size of coherent scattering areas (up to 140nm) and formation of the ordered dislocation substructure in
microparticles substantially raise the rate of photocatalytic oxidation. The relatively large size of particles
(about 0.5µm in two dimensions) allows to easily separate them from the purified water after photocatalysis
applying microfiltration.
A method has been shown for obtaining ZnO microparticles with the visible-light photocatalytic activity.
An ordered dislocation structure ensures the visible-light photocatalytic activity.
Air annealing is used to control the dislocation structure of ZnO microparticles.
The reasons for the visible-light activity of ZnO microparticles with ordered dislocation structure have been