Triboelectric nanogenerator enhanced multilayered antibacterial nanofiber air filters for efficient removal of ultrafine particulate matter
triboelectric nanogenerator, antibacterial property, electrospinning, Ag-polyimide nanofiber, air filter, ultrafine particle
ABSTRACT We developed a high-efficiency rotating triboelectric nanogenerator (R-TENG)- enhanced multilayered antibacterial polyimide (PI) nanofiber air filters for removing ultrafine particulate matter (PM) from ambient atmosphere. Compared to singlelayered PI nanofiber filters, the multilayered nanofiber filter can completely remove all of the particles with diameters larger than 0.54 µm and shows enhanced removal efficiency for smaller PM particles. After connecting with a R-TENG, the removal efficiency of the filer for ultrafine particles is further enhanced. The highest removal efficiency for ultrafine particulate matter is 94.1% at the diameter of 53.3 nm and the average removal efficiency reached 89.9%. Despite an increase in the layer number, the thickness of each individual layer of the film decreased, and hence, the total pressure drop of the filter decreased instead of increasing. Moreover, the nanofiber film exhibited high antibacterial activity because of the addition of a small amount of silver nanoparticles. This technology with zero ozone release and low pressure drop is appropriate for cleaning air, haze treatment, and bacterial control.
Tsinghua University Press
Guang Qin Gu,Chang Bao Han,Jing Jing Tian,Tao Jiang,Chuan He,Cun Xin Lu,Yu Bai,Jin Hui Nie,Zhou Li,Zhong Lin Wang, Triboelectric nanogenerator enhanced multilayered antibacterial nanofiber air filters for efficient removal of ultrafine particulate matter. NanoRes.2018, 11(8): 4090–4101