EFFICIENCY STUDY OF AIR FILTERS COATED BY TITANIUM DIOXIDE – REDUCED GRAPHENE OXIDE COMPOSITE FOR PM2.5 REMOVAL

Abstract

This research will study the efficiency of air filters coated with titanium dioxide – reduce graphene oxide composite for removing PM2.5 dust. To compare the efficiency of air filter paper coated with titanium dioxide - reducing graphene oxide in various ratios (TiO₂100%, TiO₂-RGO25%, TiO₂-RGO50% and RGO100%) and uncoated filter paper. The experiment used air filters coated with such sample composite and without coating to remove dust into the vacuum box with a volume of 18 liters and an air flow rate of 0.045 liters per second. The dust PM2.5 concentration inside the box starts at 600 micrograms per cubic meter. During the dust removal experiment, the concentration of dust inside the chamber was measured every 5 seconds until the dust concentration remained constant without further reduction.The experimental results showed that Air filter paper coated with TiO₂-RGO50% has the fastest efficiency in removing PM2.5, with an average removal time of PM2.5 of 253.33 seconds. Comparing the coated filter papers with uncoated ones reveals that the TiO₂-RGO50% coated paper outperforms the uncoated paper by 50.98%. Additionally, TiO₂-RGO25%, TiO₂100%, and RGO100% coated papers perform better than uncoated papers by 40.00%, 26.33%, and 22.22%, respectively. These test results indicate that air filter sheets coated with titanium dioxide-RGO composite are suitable for air purification systems targeting PM 2.5 removal.