▎ 摘　　要

NOVELTY - A filter is manufactured by providing a porous ceramic filter; applying a liquid cement coating on the porous ceramic filter, the liquid cement coating comprising titanium dioxide (TiO2) particles; performing first drying of the filter; soaking the filter in water; performing second drying of the filter; and exposing the filter to UV-A radiation. USE - Manufacture of filter (claimed) for purifying gases, such as air, from microbial pollutants, such as bacteria, fungi, molds, viruses and volatile organic compounds. ADVANTAGE - The method obtains filter that allows efficient purification. The use of photosensitizer allows to improve the efficiency of the titanium dioxide in the filter. The obtained filter insert has a highly porous structure, through which air can flow freely, and surface having a photocatalytic effect when exposed to UV radiation, originating both from sunlight and artificial light. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a filter comprising a porous ceramic filter coated by a cement coating comprising activated titanium dioxide (TiO2) particles. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of the filter. Flat plate (10)