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首页> 外文期刊>Journal of Materials Research >Greatly enhanced photocatalytic activity and mechanism of H_3PW_(12)O_(40)/polymethylmethacrylate/polycaprolactam sandwich nanofibrous membrane prepared by electrospinning
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Greatly enhanced photocatalytic activity and mechanism of H_3PW_(12)O_(40)/polymethylmethacrylate/polycaprolactam sandwich nanofibrous membrane prepared by electrospinning

机译：电纺丝制备的H_3PW_（12）O_（40）/聚甲基丙烯酸甲酯/聚己内酰胺三明治纳米纤维膜的光催化活性和机理大大增强

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摘要

H_3PW_(12)O_(40)/polymethylmethacrylate (PMMA)/polycaprolactam (PA6) nanofibrous membrane with a sandwich structure was prepared by electrospinning. Characterization with Fourier transformation infrared spectroscopy (FT-IR), energy-dispersive x-ray spectroscopy (EDX), and x-ray photoelectron spectroscopy (XPS) indicated that H_3PW_(12)O_(40) has been successfully loaded into the upper and bottom layers of the sandwich membrane and its Keggin structure was not destroyed. The photocatalytic efficiency of the sandwich membranes were much higher (≥87.2%) than that of H_3PW_(12)O_(40) only (15.6%) and H_3PW_(12)O_(40)/PMMA composite nanofibrous membrane (11.6%) in the degradation of methyl orange (MO) under ultraviolet irradiation. It may be caused by two factors: one was the photoreduction mechanism induced by the electron donating from PA6 to H_3PW_(12)O_(40), the other was the double contact area between H_3PW_(12)O_(40) and MO due to the sandwich structure of the laminated membrane. What is noteworthy is that the sandwich membranes were stable in water, so that they could be easily separated from the aqueous MO solution and reused without appreciable losses in photocatalytic activity after three photocatalytic cycles. In view of this, H_3PW_(12)O_(40)/PMMA/PA6 sandwich nanofibrous membrane is promising as a photocatalyst to remove organic pollutants from practical wastewater.
机译：通过电纺丝制备了具有三明治结构的H_3PW_（12）O_（40）/聚甲基丙烯酸甲酯（PMMA）/聚己内酰胺（PA6）纳米纤维膜。用傅立叶变换红外光谱（FT-IR），能量色散X射线光谱（EDX）和X射线光电子能谱（XPS）进行表征表明，H_3PW_（12）O_（40）已成功加载到上部夹心膜的最下层及其Keggin结构未被破坏。夹心膜的光催化效率比仅H_3PW_（12）O_（40）（15.6％）和H_3PW_（12）O_（40）/ PMMA复合纳米纤维膜（11.6％）高得多（≥87.2％）。在紫外线照射下甲基橙（MO）的降解。这可能是由两个因素引起的：一个是PA6向H_3PW_（12）O_（40）供电的电子所诱导的光还原机理，另一个是由于H_3PW_（12）O_（40）与MO之间的双重接触面积。层压膜的夹层结构。值得注意的是，夹心膜在水中是稳定的，因此可以很容易地从MO水溶液中分离出来并重复使用，而在三个光催化循环后光催化活性没有明显损失。鉴于此，H_3PW_（12）O_（40）/ PMMA / PA6夹层纳米纤维膜有望作为一种光催化剂去除实际废水中的有机污染物。

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  • 来源
    《Journal of Materials Research》 |2016年第19期|3060-3068|共9页
  • 作者

    Wei Li; Tingting Li; Ce Liu; Libao An; Yuqing Li; Weiwei Zhang; Lu Liu; Zhiming Zhang;

  • 作者单位

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

    College of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, China;

    College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063009, China;

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

    College of Material Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, China;

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