| http://www.w3.org/ns/prov#value | - cites the photocatalyst can be used, including visible rays, UV rays, and infrared rays. [0069] Examples of the photocatalytic material used for the wettability changeable layer 202 are metal oxides such as titanium oxide (TiO2), zinc oxide (ZnO), tin oxide (SnO2), strontium titanate (SrTiO3), tungsten oxide (WO3), bismuth oxide (Bi2O3), and iron oxide (Fe2O3), which are known as optical semicondu
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