| 摘要 |
PURPOSE: Provided is a semi-photocatalytic filter that has superior deodorant/antibacterial function even in the absence of light sources such as UV lamp. CONSTITUTION: The filter is prepared by the following steps: a preparation step of a solution or a photo semi-conductive composite ceramic from the mixture of 50 % TiO2 sol, 40% SiO2 sol, 9% ZnO sol, and 1% silver, an impregnation step of the solution or the ceramic on the pore of filter, and a dry step. Titanium isopropoxide (Ti(OCH(CH3)2)4) and isopropyl alcohol (CH3)2CHOH) are used as precursors of 0.57 mol/l TiO2 sol, tetraethyl orthosilicate tetraethoxysilane (C8H20O4Si) and isopropyl alcohol (CH3)2CHOH) as 0.44 mol/l SiO2 sol, and Zn acetate (Zn(C2H3O2)2) as 0.5 mol/l ZnO. Non-woven fiber, activated carbon, zeolite, or ocher is used as a filter material.
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