纺织学报 ›› 2019, Vol. 40 ›› Issue (10): 42-47.doi: 10.13475/j.fzxb.20180908106

• 纤维材料 • 上一篇    下一篇

同轴静电纺多孔氧化锌薄膜制备及其光催化性能

辛民岳, 郑强, 吴江丹, 梁列峰()   

  1. 西南大学 纺织服装学院, 重庆 400715
  • 收稿日期:2018-09-28 修回日期:2019-07-17 出版日期:2019-10-15 发布日期:2019-10-23
  • 通讯作者: 梁列峰
  • 作者简介:辛民岳(1993—),男,硕士生。主要研究方向为静电纺薄膜材料。
  • 基金资助:
    国家自然科学基金项目(41573106)

Preparation of porous ZnO films by coaxial electrospinning and photocatalytic performance thereof

XIN Minyue, ZHENG Qiang, WU Jiangdan, LIANG Liefeng()   

  1. College of Textile and Garment, Southwest University, Chongqing 400715, China
  • Received:2018-09-28 Revised:2019-07-17 Online:2019-10-15 Published:2019-10-23
  • Contact: LIANG Liefeng

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摘要：

为制备轻质且具有大比表面积的光催化剂,针对静电纺丝中聚合物载体大都有污染且不可再生的问题,以丝素蛋白为载体,通过同轴静电纺丝制备醋酸锌/丝素(ZnAc/SF)纳米纤维薄膜,然后浸渍于硫化钠(Na2S)溶液中制备硫化锌(ZnS)/SF纳米纤维薄膜,最后经煅烧得到ZnS/C纳米纤维薄膜和多孔ZnO薄膜。借助X射线衍射仪、X射线光电子能谱仪、扫描电子显微镜、紫外-可见分光光度计对薄膜的结构和性能进行表征,并通过亚甲基蓝催化降解实验研究其光催化性能。结果表明:多孔ZnO薄膜是由10~20 nm颗粒组成的介孔网络组织,具有吸收紫外线能力,比ZnS/C纳米纤维薄膜有更强的光催化作用,对亚甲基蓝的降解效率可达99.5%;多孔ZnO薄膜可进行回收利用,4次循环后降解效率达91%。

关键词: 印染废水, 多孔ZnO薄膜, 同轴静电纺丝, 光催化性能, 回收利用

Abstract:

In order to prepare light photocatalysts with large specific surface area, aiming at the problem that most of polymer carriers in electrospinning are polluted and non-renewable, ZnAc/silk fibroin(SF) nanofiber films were prepared by coaxial electrospinning using silk fibroin as carrier, and then ZnAc/SF nanofiber films were immersed in Na2S solution to prepare ZnS/SF nanofiber films. Finally, porous ZnO films were obtained by calcination. The structure, element composition, surface morphology and optical properties of the samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Scanning electron microscope and UV-Vis absorption spectra. Besides, the photocatalytic performance of samples were studied by MB degrading tests. The results show that the porous ZnO film is a mesoporous network composed of 10-20 nm nanoparticles with the capability of absorbing ultraviolet light. The film is stronger in photocatalytic activity than the ZnS/C nanofiber film, and has the degradation efficiency of methylene blue up to 99.5%. In addition, porous ZnO films can be easily recycled and reused, and the degradation efficiency reaches 91% after four cycles.

Key words: dyeing waste water, porous ZnO film, coaxial electrospinning, photocatalytic property, recycling

中图分类号: 

  • TQ340.64

图1

样品的扫描电镜照片"

图2

多孔ZnO薄膜的透射电镜照片"

图3

样品的XPS光谱图"

图4

样品的紫外-可见吸收光谱曲线"

图5

样品的XRD图谱"

图6

MB自降解的紫外-可见吸收光谱图"

图7

不同条件下MB的紫外-可见吸收光谱"

图8

多孔ZnO薄膜光降解MB的紫外-可见光谱图"

图9

多孔ZnO薄膜对印染废水光降解的紫外-可见光谱"

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