不同液体环境对PAN/TiO_(2)纤维膜的催化效率影响探究

The effect of different liquid environment on the catalytic efficiency of PAN/TiO_(2) fiber membrane

以聚丙烯腈(PAN)、纳米二氧化钛(TiO_(2))为原材料,利用远场静电纺丝技术,制备PAN/TiO_(2)纤维膜,探究含有不同离子的液体环境对PAN/TiO_(2)纤维膜催化亚甲基蓝(MB)活性的影响。结果表明,不同pH值的液体环境对PAN/TiO_(2)纤维膜的吸附能力影响较小,对催化活性有较大影响。液体环境中Cl^(-)浓度对PAN/TiO_(2)纤维膜的吸附性能有较大的影响,间接导致PAN/TiO_(2)纤维膜催化活性发生改变。相同浓度的CO^(2-)_(3)、Cl^(-)、HPO^(2-)4、SO^(2-)_(4)对PAN/TiO_(2)纤维膜吸附能力的影响差别较小,但是相较于其他阴离子,CO^(2-)_(3)对PAN/TiO_(2)纤维膜的催化活性具有更强的抑制能力。

PAN/TiO_(2) fiber membranes were prepared by electrospinning with polyacrylonitrile(PAN)and nano-TiO_(2)(TiO_(2)).Using PAN/TiO_(2) fiber membrane as the catalytic material and methylene blue as the reaction substrate,explore the influence of liquid environment containing different ions on the catalytic activity of PAN/TiO_(2) fiber membrane.The results show that the pH of liquid environment has little effect on the adsorption capacity of PAN/TiO_(2) fiber membrane,but has a great influence on the catalytic efficiency.Different concentrations of Cl-in liquid environment have great influence on the adsorption capacity of PAN/TiO_(2) fiber membrane,which indirectly leads to the change of catalytic efficiency of PAN/TiO_(2) fiber membrane.The same concentration of Cl^(-),CO^(2-)_(3),SO^(2-)_(4),HPO^(2-)_(4) has little effect on the adsorption capacity of PAN/TiO_(2) fiber membrane,but,compared with other anions,CO^(2-)_(3) has a stronger inhibitory ability on the catalytic activity of PAN/TiO_(2) fiber membranes.