Abstract
Air filtering is one of the most effective methods to enhance indoor air quality, and the filtration performance and usage form are the main parameters that affect its widespread promotion. In this paper, we compare the filtration performance of single-layer rGO composite materials with commonly used combination double-layer air filter materials. The results showed that the filtration performance of the single-layer filter material was lower than that of the combined double-layer filter material, with differences of only 7.18%, 4.97%, and 4.54% in filtration efficiency for PM10, PM2.5, and PM1.0. For particle sizes below 0.65 μm, however, the counting filtration efficiency of single-layer filter materials is 20.57% higher than that of combined double-layer filter materials. The resistance is significantly lower than the total resistance of the combined double-layer filter material, with a difference of 21.5–40.2 Pa. At the optimal filtration velocity, the QF values of single-layer filter materials for PM10, PM2.5, and PM1.0 are 0.0017 Pa−1, 0.0009 Pa−1, and 0.0005 Pa−1 higher than those of combined double-layer filter materials. In addition, the thickness of single-layer filter materials is 19.14 mm less than that of combined double-layer filter materials, and the volume is reduced by 70.89% under the same size conditions. Overall, single-layer rGO composite materials exhibit more advantages than their combined double-layer counterparts. The results presented herein lay the foundation for the development of filter materials and are of certain reference value.