activat-Using graphene oxide to efficiently filter particulate matter at high concentrations

the air. PM comprises most of the air pollution around the world and is separated into three categories according to particle diameter. PM 1.0 describes particles with a diameter of 1 mm and smaller, PM 2.5 describes particulates with a diameter of 2.5 mm and smaller, and PM 10 describes particulates with a diameter of 10 mm and smaller. PM 2.5 is especially notable for its toxicity to the human body (3). In this paper, we showed that coating graphene oxide onto commercial filters increased the purification efficiency of air filters. , or PM 1.0 ). We observed that filters with the addition of graphene oxide were able to purify polluted air containing PM at concentrations above 3000\ \mu g/m 3 , a concentration above which commercially available filters cannot. The efficiency of graphene oxide-treated filters was much greater than commercially available filters. Based on our data, we proposed a mechanism by which graphene oxide can effectively diminish the amount of PM in the air.