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

To test the photoactivity of relevant RNMs, we equipped a daylight irradiation device with an irradiance of 6.5 mW cm −2 and a facile availability of light source [D65 standard daylight tube (GE F15T8/D)] and measured the formed ROS in terms of two typical species: OH• and H 2 O 2 (36) . The relevant RNMs were subjected to a cyclic irradiation test with 20-min interval light-dark fatigue cycles. As shown in Fig. 2 (F and G), generation of OH• and H 2 O 2 was mainly observed during irradiation and paused during dark periods, and the amount of ROS steadily increased after irradiation with no significant decrease in activity. The BD-RNM and BDCA-RNM exhibited robust photoactivity, whereas the BA-RNM and CA-RNM only showed poor ROS generation capacity. Significantly, the BDCA-RNMs exhibited the highest OH• and H 2 O 2 generation capacities of 49.96 and 15.26 mg g −1 min −1 , respectively, which were one to two orders of magnitude higher than those of other daylight-driven photoactive materials (26, 39) .