Controlling the bioaerosol present in indoor environments has been evidenced to be extremely necessary. An alternative is to develop filter media for air conditioners that have biocidal properties. This study aimed to verify the biocidal effect of a high-efficiency particulate air (HEPA) filter medium modified with the deposition of nanoparticles on its surface. For this purpose, Ag, TiO₂, and Ag/TiO₂ nanoparticles were used and the antimicrobial activities of these nanomaterials against Escherichia coli, Staphylococcus aureus, and Candida albicans microorganisms were evaluated, as well as the biocidal efficacy of the modified HEPA filter with these nanomaterials in a real environment. The percentages of elimination obtained for the Ag, TiO₂, and Ag/TiO₂ nanomaterials, respectively, were 53%, 63%, and 68% (E. coli); 67%, 67%, and 69% (S. aureus); and 68%, 73%, and 75% (C. albicans). The HEPA filter media had their surfaces modified by aspersion and deposition of Ag, TiO₂, and Ag/TiO₂ nanomaterials. We could conclude that the nanoparticles adhered to the filter medium do not affect its permeability. The modified filters were arranged in an internal environment (bathroom) for the collection of the bioaerosols, and after the collection, the filter cake was plated and arranged to grow in a liquid medium. The results showed that the filters have 100% of biocidal action in passing air, and 55.6%, 72.2%, and 81% of inhibition to microbial growth in their surface for modification with Ag, TiO₂, and Ag/TiO₂, respectively, compared to unmodified filters.

已经证明控制室内环境中存在的生物气溶胶是极其必要的。一种替代方法是开发具有杀菌特性的空调过滤介质。这项研究旨在验证经过微粒表面改性的高效微粒空气（HEPA）过滤介质的杀菌作用。为此，使用了Ag，TiO ₂和Ag / TiO ₂纳米颗粒，这些纳米材料对大肠杆菌，金黄色葡萄球菌和白色念珠菌的抗菌活性。评估了微生物，以及在实际环境中使用这些纳米材料改性的HEPA过滤器的杀菌功效。对于Ag，TiO ₂和Ag / TiO ₂纳米材料，消除率分别为53％，63％和68％（大肠杆菌）。67％，67％和69％（金黄色葡萄球菌）; 和68％，73％和75％（白色念珠菌）。HEPA过滤介质的表面经过Ag，TiO ₂和Ag / TiO _2的扩散和沉积而被改性纳米材料。我们可以得出结论，粘附在过滤介质上的纳米颗粒不会影响其渗透性。将改性的滤器布置在用于收集生物气溶胶的内部环境（浴室）中，并且在收集之后，将滤饼铺板并布置成在液体介质中生长。结果表明，过滤器在通过空气时具有100％的杀生物作用，分别对表面进行微生物修饰（分别用Ag，TiO ₂和Ag / TiO ₂进行修饰）有55.6％，72.2％和81％的抑制作用，与未修改的过滤器相比