▎ 摘　　要

NOVELTY - A photocatalytic filter screen is prepared by spraying a photocatalytic suspension on a metal filter screen. The photocatalytic suspension comprises 60-75 parts by mass water, 2-10 parts by mass photocatalyst, 0.3-1.5 parts by mass dispersing agent, 0.5-2 parts by mass wetting agent, 1-3 parts by mass curing agent and 6-12 parts by mass aqueous industrial paint. USE - The photocatalytic suspension sprayed on filter screen, is used in the treatment of volatile organic compounds (VOCs) (claimed). ADVANTAGE - The environmentally safe photocatalytic suspension sprayed on the filter screen, has improved efficiency. Even after the filter screen is brushed 20-50 times, the catalytic degradation efficiency of the suspension is not reduced. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. photocatalytic suspension. 2. preparation of photocatalytic filter screen. The method involves mixing and stirring dispersing agent and distilled water uniformly, followed by adding photocatalyst into mixed solution, stirring and dispersing uniformly, adding wetting agent, curing agent and water-based industrial paint into dispersion liquid, followed by stirring and uniformly dispersing to form a photocatalytic suspension. The photocatalytic suspension liquid is sprayed on metal filter screen by using a spraying device and drying.