Journal
POLYMER TESTING
Volume 113, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2022.107613
Keywords
Polyvinylidene fluoride; Hydrophilic performance; Antifouling property; Photocatalytic
Funding
- National Science and Technology Support Project of China [2014BAB07B01, 2015BAB09B01]
- Key Technology R & D Program of Shanghai Committee of Science and Technology in China [14231201503]
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In this study, a novel membrane was developed by incorporating ZnO@ZIF-8 nanoparticles into PVDF substrates, resulting in improved antifouling property. The modified membrane showed high pure water flux and flux recovery rate, as well as high separation efficiency and degradation rate in 4-NP degradation test.
ZIF-8 modification can reduce aggregation of ZnO (a typical photocatalyst), and enhances antifouling property of PVDF membranes. In this study, we developed a novel membrane by adding ZnO@ZIF-8 nanoparticles into polyvinylidene fluoride (PVDF) substrates by using non-solvent induced phase separation (NIPS) method. Filtration test with bovine serum albumin (BSA) showed that the modified membrane has good pure water flux (395 L m(-2) h(-1), PWF) and high flux recovery rate (94%, FRR). Furthermore, the SiO2:ZnO@ZIF-8 membrane showed high separation effect in 4-NP degradation test under light condition, with the flux achieved about 321 L m(-2) h(-1) during filtration process. The degradation efficiency reached 81.5%, the apparent rate constant (Kapp/min(-1)) was 0.211 min(-1). Besides, in prolonged 4-nitrophenol (4-NP) degradation test, the SiO2:ZnO@ZIF-8 membrane maintained higher flux and degradation rate. Thus, we reported a novel membrane with a prominent antifouling property.
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