A practical scale photocatalytic air purifier equipped with a TiO₂/H-ZSM-5 composite bead filter was demonstrated to be able to effectively remove indoor volatile organic compounds (VOCs) and viruses with sustainable performances under UVA-LED illumination. TiO₂ hybridized with 5 wt% H-ZSM-5 zeolite significantly enhanced its photocatalytic activity for degrading VOCs including formaldehyde, acetaldehyde, and toluene, than bare TiO₂. H-ZSM-5 provided strong adsorption sites for these compounds, thus accelerating their photocatalytic conversion into CO₂ by adjacent TiO₂ photocatalyst. Moreover, owing to its superior adsorption capacity, the composite bead filter completely prevented the emission of formaldehyde produced by photocatalytic oxidation of toluene. The sustainability of this composite bead filter for VOC removal was confirmed by regeneration and accelerated durability tests. In addition, the photocatalytic air purifier was effective in removing aerosolized viral particles of bacteriophage Phi-X 174. It was confirmed that the viruses on filter surfaces were completely inactivated by photocatalytic oxidation. TiO₂/H-ZSM-5 composite beads also exhibited excellent efficacies for inactivation of pathogenic coronaviruses including SARS-CoV-2. The photocatalytic process degraded viral RNAs of SARS-CoV-2 by more than 99.999% in 1 h, eliminating the viral infectivity. Results of this study suggest that the air purifier equipped with the composite bead filter is ready for practical applications for home and hospital uses.

配备TiO ₂ /H-ZSM-5复合珠过滤器的实用级光催化空气净化器被证明能够在UVA-LED照明下以可持续的性能有效去除室内挥发性有机化合物（VOC）和病毒。与裸 TiO ₂相比，TiO ₂与 5 wt% H-ZSM-5 沸石杂化显着增强了其降解 VOC 包括甲醛、乙醛和甲苯的光催化活性。H-ZSM-5对这些化合物提供强的吸附位点，从而加速其光催化转化成CO ₂由相邻的TiO ₂光触媒。此外，由于其优异的吸附能力，复合珠过滤器完全阻止了甲苯光催化氧化产生的甲醛的排放。再生和加速耐久性测试证实了这种用于去除 VOC 的复合珠过滤器的可持续性。此外，光催化空气净化器可有效去除噬菌体 Phi-X 174 的雾化病毒颗粒。证实光催化氧化将过滤器表面的病毒完全灭活。二氧化钛₂/H-ZSM-5 复合珠对包括 SARS-CoV-2 在内的病原体冠状病毒的灭活也表现出优异的功效。光催化过程在 1 小时内将 SARS-CoV-2 的病毒 RNA 降解了 99.999% 以上，消除了病毒的传染性。这项研究的结果表明，配备复合珠过滤器的空气净化器已准备好用于家庭和医院的实际应用。