A novel mixed matrix nanofiltration membrane was constructed by coating a casting solution containing polyvinylidene fluoride(PVDF),polyethylene glycol(PEG)as hydrophilic agent,zeolitic like framework-67(ZIF-67),ethyl...A novel mixed matrix nanofiltration membrane was constructed by coating a casting solution containing polyvinylidene fluoride(PVDF),polyethylene glycol(PEG)as hydrophilic agent,zeolitic like framework-67(ZIF-67),ethylenediamine as cross-linking agent on Ag-nanoparticle-decorated polyester textile(PT)support(PT/AgNPs/PVDF-PEG/ZIF-67).PT/Ag-NPs/PVDF-PEG/ZIF-67 morphology,crystalline structure,surface chemical composition and hydrophilicity of PT/Ag-NPs/PVDF-PEG/ZIF-67 were fully characterized by field emission scanning electron microscopy(FE-SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR)and water contact angle technique,respectively.PT/Ag-NPs/PVDF-PEG/ZIF-67 was applied in cross module set-up for removal of contaminated water containing rose bengal(RB)dye.The effect of operational parameters such as dye concentration,solution pH and flow rate on performance of PT/Ag-NPs/PVDF-PEG/ZIF-67 were investigated and optimized by central composite design(CCD).Casting solution containing 0.5 wt.%ZIF-67 as optimum value showed the good wettability,high pure water flux(PWF;35.8 L·m-2·h-1),flux recovery ratio(FRR;90%),dye removal efficiency(96.41%).The selectivity factor of 12.72 and 14.42 was found to be for RB in the presence of amido black and methylene blue as interferent dyes,respectively,which showed a good selective recognition ability for RB dye.展开更多
文摘A novel mixed matrix nanofiltration membrane was constructed by coating a casting solution containing polyvinylidene fluoride(PVDF),polyethylene glycol(PEG)as hydrophilic agent,zeolitic like framework-67(ZIF-67),ethylenediamine as cross-linking agent on Ag-nanoparticle-decorated polyester textile(PT)support(PT/AgNPs/PVDF-PEG/ZIF-67).PT/Ag-NPs/PVDF-PEG/ZIF-67 morphology,crystalline structure,surface chemical composition and hydrophilicity of PT/Ag-NPs/PVDF-PEG/ZIF-67 were fully characterized by field emission scanning electron microscopy(FE-SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR)and water contact angle technique,respectively.PT/Ag-NPs/PVDF-PEG/ZIF-67 was applied in cross module set-up for removal of contaminated water containing rose bengal(RB)dye.The effect of operational parameters such as dye concentration,solution pH and flow rate on performance of PT/Ag-NPs/PVDF-PEG/ZIF-67 were investigated and optimized by central composite design(CCD).Casting solution containing 0.5 wt.%ZIF-67 as optimum value showed the good wettability,high pure water flux(PWF;35.8 L·m-2·h-1),flux recovery ratio(FRR;90%),dye removal efficiency(96.41%).The selectivity factor of 12.72 and 14.42 was found to be for RB in the presence of amido black and methylene blue as interferent dyes,respectively,which showed a good selective recognition ability for RB dye.
