Daylight-driven rechargeable antibacterial and antiviral nanofibrous membranes for bioprotective applications

Si, Yang; Zhang, Zheng; Wu, Wanrong; Fu, Qiuxia; Huang, Kang; Nitin, Nitin; Ding, Bin; Sun, Gang

Characterization SEM images were examined by a Philips FEI XL30. UV-vis absorption spectra were collected with an Evolution 600 spectrophotometer (Thermo Fisher Scientific), and the diffuse reflection spectra were collected with a DRA-EV-600 diffuse reflectance accessory (Labsphere). 1 H NMR spectra were recorded on a 400-MHz Bruker Avance HD spectrometer, and DMSO-d 6 was used as a solvent. A TSI Model 8130 automated filter tester (TSI Inc.) was used to measure the filtration efficiency and pressure drop, and NaCl monodisperse aerosols with a size of 0.3 to 0.5 mm and an SD less than 1.86 were used as the model particles. The filtration QF values were defined by the formula: QF = −ln(1 − h)/Dp, in which the h was the filtration efficiency and the Dp was the pressure drop.