采用静电纺丝法制备了磷钨酸(H3PW12O40)/聚甲基丙烯酸甲酯(PMMA)/尼龙6(PA6)夹层复合纳米纤维膜,并通过扫描电镜、X射线能谱和红外光谱对其形貌和结构进行表征.结果显示,H3PW12\40存在于夹层膜的上层与下层,且其Keggin结构未遭到破坏.与H3PW12\40粉末和H3 PW12O40/PMMA复合纳米纤维膜相比,夹层膜对甲基橙(MO)具有更高的光催化活性.夹层纳米纤维膜易于回收并能重复使用,循环使用3次后光催化活性无明显下降,主要归咎于H3PW12O40稳定地负载于纳米纤维膜中.因此,H3PW12O40/PMMA/PA6夹层复合纳米纤维膜在水污染治理领域具有潜在的实际应用价值.
H3PW12O40/polymethylmethacrylate (PMMA)/polycaprolactam (PA6) sandwich nanofibrous membranes were prepared by electrospinning technique.The morphology and structure of the sandwich nanofibrous membranes were characterized by scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDX) and Fourier transformation infrared spectroscopy (FT-IR).The results indicate that H3PW12O40 is successfully compounded in the upper and under layers of the sandwich nanofibrous membrane and its Keggin structure has not been destroyed.H3PW12O40/PMMA/PA6 sandwich nanofibrous membranes exhibit enhanced photocatalytic efficiency in the degradation of methyl orange (MO) compared with H3PW12O40 powder and H3PW12O40/PMMA composite nanofibrous membrane.Furthermore,the sandwich nanofibrous membrane could be easily separated from aqueous MO solution and reused.The photocatalytic efficiency of the membrane has little change after three photocatalytic cycles,which may be attributed to stability of H3PW12O40 in the sandwich nanofirous membrane.In view of this,H3PW12O40/PMMA/PA6 sandwich nanofirous membranes exhibit the potential for practical applications to eliminate organic pollutants from wastewater.
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