Fabrication an‎d investigation of properties of air filter based on nylon mesh coated with nanostructures of silver, graphene an‎d carbon nanotubes

9/22/2026 12:00:00 AM

PM2.5 particles, as one of the most important air pollutants, have become a global challenge in the fields of health an‎d the environment. Similar to many other regions worldwide,iran, especially in its metropolitan areas like Tehran, faces the critical of increasing PM2.5 concentrations, which impose heavy economic an‎d social costs on the healthcare an‎d environmental systems thereby doubling the necessity for developing novel filtration technologies. This study focuses on the fabrication an‎d eva‎luation of an air filter based on a nanofiber mesh coated with silver nanoparticles, graphene oxide, an‎d carbon nanotubes. The objective of this research is to enhance filtration performance an‎d compare the efficiency of zero-, one-, an‎d two-dimensional nanomaterials in improving the removal efficiency of PM2.5. A nylon mesh with a pore size of 10μm an‎d initial removal efficiency of 36.45% was selec‎ted as the substrate. Characterization tests such as SEM, TEM, FTIR, XRD, an‎d contact angle measurements were performed on the nanomaterials an‎d the nylon mesh. The samples were immersed for 1, 3, an‎d 5 coating cycles, an‎d SEM images confirmed the successful deposition of nanomaterials on the nylon surface.The removal efficiency of PM2.5 for the samples coated with silver nanoparticles, carbon nanotubes, an‎d graphene oxide reached 39.02%, 46.2%, an‎d 52.21% after one cycle; 44.28%, 48.99%, an‎d 69.07% after three cycles; an‎d 47.71%, 50.76%, an‎d 69.71% after five cycles, respectively.The best-performing sample in terms of efficiency was the mesh coated with graphene oxide after five immersion cycles. Finally, the highest performance was achieved by stacking two layers of the best-performing filter (GO-coated after five immersions), which increased the adsorption efficiency to 81.77%. These results demonstrate that the use of nanomaterials can effectively enhance the efficiency of filters in adsorbing PM2.5, among which two-dimensional nanomaterials such as graphene oxide exhibit superior performance compared to one- an‎d zero-dimensional nanomaterials like carbon nanotubes an‎d silver nanoparticles. This research can be an effective step towards developing air filters with enhanced capabilities for reducing PM2.5 an‎d improving air quality.

: فيلتر هوا، نانوذرات نقره، گرافن، نانولوله كربني، آلودگي هوا، ذرات معلق

Air filter, silver nanoparticles, graphene, carbon nanotubes, air pollution, particulate matter

Behnam Sedigh Imani

DR. Maisam Jalaly