Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 13, Pages 12880-12889Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b01508
Keywords
air filtration; antibacterial; electrospinning nanofibers; multifunctional; photodegradation
Funding
- National Natural Science Foundation of China [21774060, 31770609]
- National Key R&D Program of China [2017YFF0207800]
- Jiangsu Key Lab of Biomass based Energy and Materials [JSBEM2016011]
- State Key Laboratory for Mechanical Behavior of Materials [20171914]
- Natural Science Key Project of the Jiangsu Higher Education Institutions [16KJA220006]
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Ambient particulate matter pollution has posed serious threats to global environment and public health. However, highly efficient filtration of submicron particles, the so-named secondary pollution caused by, e.g., bacterial growth in filters and the use of nondegradable filter materials, remains a serious challenge. In this study, poly(vinyl alcohol) (PVA) and konjac glucomannan (KGM)-based nanofiber membranes, loaded with ZnO nanoparticles, were prepared through green electrospinning and ecofriendly thermal cross-linking. Thus obtained fibrous membranes not only show highly efficient air-filtration performance but also show superior photocatalytic activity and antibacterial activity. The filtration efficiency of the ZnO@PVA/KGM membranes for ultrafine-particles (300 nm) was higher than 99.99%, being superior to that of commercial HEPA filters. By virtue of the high photocatalytic activity, methyl orange was efficiently decolorized with a removal efficiency of more than 98% at an initial concentration of 20 mg under 120 min of solar irradiation. A multifunctional membrane with high removal efficiency, low flow resistance, superior photocatalytic activity, and superior antibacterial activity was successfully achieved. It is conceivable that the combination of a biodegradable polymer and an active metal particle would form an unprecedented photocatalytic system, which will be quite promising for environmental remediation such as air filtration and water treatment.
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