title: Transparent air filter for high-efficiency PM2.5 capture.
abstract: Particulate matter (PM) pollution has raised serious concerns for public health. Although outdoor individual protection could be achieved by facial masks, indoor air usually relies on expensive and energy-intensive air-filtering devices. Here, we introduce a transparent air filter for indoor air protection through windows that uses natural passive ventilation to effectively protect the indoor air quality. By controlling the surface chemistry to enable strong PM adhesion and also the microstructure of the air filters to increase the capture possibilities, we achieve transparent, high air flow and highly effective air filters of ~90% transparency with >95.00% removal of PM2.5 under extreme hazardous air-quality conditions (PM2.5 mass concentration >250 μg m(-3)). A field test in Beijing shows that the polyacrylonitrile transparent air filter has the best PM2.5 removal efficiency of 98.69% at high transmittance of ~77% during haze occurrence.
authors: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors: Chong
authors: C
authors: Liu
authors: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors: Po-Chun
authors: PC
authors: Hsu
authors: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors: Hyun-Wook
authors: 0000000190741619
authors: HW
authors: Lee
authors: Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, USA.
authors: Meng
authors: M
authors: Ye
authors: Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA.
authors: Guangyuan
authors: G
authors: Zheng
authors: Department of Chemistry, Stanford University, Stanford, California 94305, USA.
authors: Nian
authors: N
authors: Liu
authors: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors: Weiyang
authors: W
authors: Li
authors: 1] Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA [2] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors: Yi
authors: Y
authors: Cui
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D061808:Air Filters; D000397:Air Pollution / Q000032:analysis*; D000068476:Beijing; D006813:Humidity; D057139:Nanofibers / Q000737:chemistry; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D056951:Photoelectron Spectroscopy; D013499:Surface Properties; D014919:Wind
chemical_list: D000180:Acrylic Resins; D052638:Particulate Matter; C010504:polyacrylonitrile