原位生长法制备NH_(2)-MIL-88B/PAN静电纺丝纳米纤维膜及其在水处理中的应用

Preparation of NH_(2)-MIL-88B/PAN Electrospun Nanofiber Membrane by In-situ Growth Method and Its Application in Water Treatment

基于PAN静电纺丝纳米纤维膜,利用原位生长法制备了具有光芬顿降解性能及过滤分离性能的静电纺丝纳米纤维复合膜NH_(2)-MIL-88B/PAN;研究了膜结构变化对乳液分离、染料及抗生素催化降解性能的影响。研究结果表明:原位生长2mmol的NH_(2)-MIL-88B(NM88B)的静电纺丝纳米纤维膜对染料(亚甲基蓝,MB)及抗生素(红霉素)水溶液光催化降解速率高于生长1 mmol的PAN基膜;80 min MB的降解率可达99.6%,而60 min后红霉素的降解率已达100%。受重力驱动,该膜对甲苯乳液的分离效率可达99.2%,渗透通量高达650 L·m^(-2)·h^(-1);经过8次循环分离实验测试,甲苯乳液的分离效率仍保持97%以上,被污染的膜经可见光处理后,乳液渗透通量基本可以恢复如初,具有较好的自清洁能力。

Electrospun nanofiber membrane(NH_(2)-MIL-88B/PAN)with photo Fenton degradation and separation capacity was prepared via electrospinning and in-situ growth method.The structural changes of composite membranes and their effects on emulsion separation and dye degradation were studied.The results showed that the degradation rate of PAN/NM88B(2 mmol NM88B)nanofiber membrane towards MB was more efficient than that of the growth 1 mmol catalyst,with the degradation rate of 99.6%after 80 min.The decomposition rate of erythromycin reached 100%after 60 min.Driven by gravity,the separation efficiency of the membrane to toluene emulsion reached 99.2%,and the permeation flux was as high as 650 L·m^(-2)·h^(-1).After 8 repeated tests,the separation efficiency of toluene emulsion still remained above 97%.After being treated with visible light,the permeable flux of the contaminated membrane could basically recover and had good self-cleaning ability.