| http://www.w3.org/ns/prov#value | - In certain embodiments of the present invention, at least a portion of the photocatalytic material is present in the liquid composition in the form of particles having an average crystalline diameter of 1 to 100 nanometers, such as 3 to 35 nanometers, or, in yet other embodiments, 7 to 20 nanometers.
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