کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4988727 | 1455968 | 2017 | 8 صفحه PDF | دانلود رایگان |
- An air cleaning membrane with hierarchical nano-structure was successfully prepared.
- Ag NPs and ZnO NRs endowed the membrane with multi-pollutant control functions.
- The novel membrane exhibited good antibacterial and HCHO degradation performance.
It has been well recognized that there are a number of indoor contaminants including particulate matter, gaseous pollutants and microbials. The removal of indoor contaminants often requires multiple layers of various air filters. Herein, we report on a multifunctional air purifying filter produced by the hydrothermal growth of ZnO nanorod-wrapped PTFE nanofibers, constructed of nanostructured Ag deposited on the ZnO nanorods with a hierarchical structure for gas contaminant removal. Atomic layer deposition (ALD) was used to seed a layer of ZnO nanoseeds onto the PTFE fibrils which were then subjected to a hydrothermal reaction to form ZnO nanorods. Ag nanoparticels were subsequently assembled on the surface of the ZnO nanorods via a silver electroless deposition reaction. The resulting composite membrane exhibited an excellent dynamic antibacterial property of ~100% and a formaldehyde degradation rate of 60%. Compared with the pristine membrane, the gas permeation of the composite membrane increased from 227.26Â m3Â mâ2Â hâ1Â kPaâ1 to 275.36Â m3Â mâ2Â hâ1Â kPaâ1. The successful fabrication of this composite membrane with remarkable antibacterial and excellent formaldehyde degradation performance may provide a new route for the preparation of indoor air purification filters.
Air purification process of functionalized PTFE membrane.231
Journal: Journal of Membrane Science - Volume 531, 1 June 2017, Pages 86-93