The Industrial Technology Research Institute (Hsinchu, TW) received U.S. Patent 7,713,912 for its nano-photocatalytic sol that may be used to form a photocatalytic coating layer on a substrate surface. Due to the interlaced structure of spherical nano-photocatalyst, non-spherical nano-photocatalyst and partially non-crystalline photocatalytic material, the coating formed layer from them possesses high adhesion, high hardness, and excellent photocatalytic activity, according toinventors Chia-Hung Huang, Yao-Ling Huang, Yao-Hsuan Tseng, Yu-Ming Lin and Shu-Ling Liu.
"Nano-photocatalyst" means a nano-sized material that can catalyze/decompose compounds under the irradiation of ultraviolet light and/or visible light. The spherical nano-photocatalytic material includes nano material known to have photocatalytic activity, such as titanium dioxide, cadmium selenide, zinc oxide, and tin dioxide.
The coating is designed to solve a problem with currently available nano-photocatalytic sols which tend to run into an adhesion problem where its coating layer on the substrate is prone to peel off, thereby adversely affecting the service life of photocatalyst.
To address the drawbacks of prior arts, the Industrial Technology Research Institute photocatalytic sol forms a harder, highly adhesive coating layer with excellent photocatalytic effect. The photocatalyst coating layer is not easy to peel off, hence prolonging the service life of photocatalyst. The coating also provides a photocatalytic sol without a binder, so that the photocatalytic activity will not be curtailed by the use of binder.
To achieve a stronger, harder coating, the nano-photocatalytic sol comprises: at least a substantially spherical nano-photocatalyst; and a non-spherical nano-photocatalytic sol; wherein the non-spherical nano-photocatalytic sol contains a non-spherical nano-photocatalyst and a partially non-crystalline photocatalyst material. The partially non-crystalline photocatalytic material includes titanium oxide, cadmium selenide, zinc oxide, tin dioxide, or mixtures of the materials.
To address the drawbacks of prior arts, the Industrial Technology Research Institute photocatalytic sol forms a harder, highly adhesive coating layer with excellent photocatalytic effect. The photocatalyst coating layer is not easy to peel off, hence prolonging the service life of photocatalyst. The coating also provides a photocatalytic sol without a binder, so that the photocatalytic activity will not be curtailed by the use of binder.
To achieve a stronger, harder coating, the nano-photocatalytic sol comprises: at least a substantially spherical nano-photocatalyst; and a non-spherical nano-photocatalytic sol; wherein the non-spherical nano-photocatalytic sol contains a non-spherical nano-photocatalyst and a partially non-crystalline photocatalyst material. The partially non-crystalline photocatalytic material includes titanium oxide, cadmium selenide, zinc oxide, tin dioxide, or mixtures of the materials.
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