The ionic liquid(IL) 1-butyl-3-methylimidazolium tetrafluoroborate treated with radiofrequency plasma is proposed for functionalization and immobilization on polyethersulfone supports to form supported ionic liquid me...The ionic liquid(IL) 1-butyl-3-methylimidazolium tetrafluoroborate treated with radiofrequency plasma is proposed for functionalization and immobilization on polyethersulfone supports to form supported ionic liquid membranes for CO_(2) separation.The effects of treatment time and transmembrane pressure difference on CO_(2) permeance were evaluated.The best gas permeation performance was obtained with a treatment time of 10 min and the transmembrane pressure difference was 0.25 MPa.Characterization of the materials by Fourier transform infrared spectroscopy,x-ray photoelectron spectroscopy and nuclear magnetic resonance spectroscopy demonstrates that the IL is grafted with carboxyl groups and deprotonated through plasma treatment.A preliminary mechanism for the plasma treatment and facilitated transport of CO_(2)has been proposed on this basis.展开更多
采用高压塑片的方法制备了一种PbO2电极,用X衍射、扫描电镜、火焰原子吸收分光光度法对该电极性能进行了考察,并探讨了该电极降解硝基苯的机理和工艺条件.结果表明,该电极与普通石墨电极相比,CODCr去除率更高,电解5 h CODCr去除率最高可...采用高压塑片的方法制备了一种PbO2电极,用X衍射、扫描电镜、火焰原子吸收分光光度法对该电极性能进行了考察,并探讨了该电极降解硝基苯的机理和工艺条件.结果表明,该电极与普通石墨电极相比,CODCr去除率更高,电解5 h CODCr去除率最高可达65%.由于PbO2电极具有较高的析氧电位,在阳极极化下,PbO2电极表面易生成.OH,这是其电解效率高的主要原因.该电极电解硝基苯的最适条件:ρ(硝基苯)为501.5 mg/L,电极间距为3 cm,溶液pH为7.利用该电极处理含磷酸盐和氯离子的硝基苯废水效果尤为突出,但由于阴极的还原作用,电解过程中硝基苯不能被完全氧化.展开更多
基金supported by the National Key R&D Program of China ‘Intergovernmental International Scientific and Technological Innovation Cooperation’ (No. 2019YFE0122100)。
文摘The ionic liquid(IL) 1-butyl-3-methylimidazolium tetrafluoroborate treated with radiofrequency plasma is proposed for functionalization and immobilization on polyethersulfone supports to form supported ionic liquid membranes for CO_(2) separation.The effects of treatment time and transmembrane pressure difference on CO_(2) permeance were evaluated.The best gas permeation performance was obtained with a treatment time of 10 min and the transmembrane pressure difference was 0.25 MPa.Characterization of the materials by Fourier transform infrared spectroscopy,x-ray photoelectron spectroscopy and nuclear magnetic resonance spectroscopy demonstrates that the IL is grafted with carboxyl groups and deprotonated through plasma treatment.A preliminary mechanism for the plasma treatment and facilitated transport of CO_(2)has been proposed on this basis.
文摘采用高压塑片的方法制备了一种PbO2电极,用X衍射、扫描电镜、火焰原子吸收分光光度法对该电极性能进行了考察,并探讨了该电极降解硝基苯的机理和工艺条件.结果表明,该电极与普通石墨电极相比,CODCr去除率更高,电解5 h CODCr去除率最高可达65%.由于PbO2电极具有较高的析氧电位,在阳极极化下,PbO2电极表面易生成.OH,这是其电解效率高的主要原因.该电极电解硝基苯的最适条件:ρ(硝基苯)为501.5 mg/L,电极间距为3 cm,溶液pH为7.利用该电极处理含磷酸盐和氯离子的硝基苯废水效果尤为突出,但由于阴极的还原作用,电解过程中硝基苯不能被完全氧化.
