Acta Chimica Sinica ›› 2022, Vol. 80 ›› Issue (1): 49-55.DOI: 10.6023/A21080402 Previous Articles     Next Articles

Article

柔性可水洗的Zr-MOFs复合纳米纤维薄膜的制备和性能表征

郝肖柯a,b, 翟振宇a,b, 孙亚昕a,b, 李从举a,b,*()   

  1. a北京市高校节能与环保工程研究中心 北京 100083
    b北京科技大学能源与环境工程学院 北京 100083
  • 投稿日期:2021-08-26 发布日期:2021-10-22
  • 通讯作者: 李从举
  • 基金资助:
    项目受国家自然科学基金(52170019); 项目受国家自然科学基金(51973015); 中央高校基本科研业务费专项资金(06500100); 中央高校基本科研业务费专项资金(FRF-TP-19-046AIZ)

Preparation and Performance Characterization of Flexible and Washable Zr-MOFs Composite Nanofiber Membrane

Xiaoke Haoa,b, Zhenyu Zhaia,b, Yaxin Suna,b, Congju Lia,b()   

  1. aBeijing University Energy Conservation and Environmental Protection Engineering Research Center, Beijing 100083, China
    bSchool of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2021-08-26 Published:2021-10-22
  • Contact: Congju Li
  • Supported by:
    National Natural Science Foundation of China(52170019); National Natural Science Foundation of China(51973015); Fundamental Research Funds for the Central Universities(06500100); Fundamental Research Funds for the Central Universities(FRF-TP-19-046AIZ)

Flexible high adsorption materials play a key role in many fields such as wastewater and exhaust gas treatment, protective clothing manufacturing, toxic and harmful substance monitoring. In situ growth of NO2-UiO-66 on electrostatic spun nanofiber was obtained by aqueous synthesis using trifluoroacetic acid as regulator, and water as solvent. The effects of different ratio of trifluoroacetic acid (TFA)/deionized water, different metal salt and ligand proportions and hydrothermal growth time on NO2-UiO-66 morphology and load effects were studied. The add content of TFA was φTFA=30%, the molar ratio of metal salt and the ligand was 1∶1.5, and the hydrothermal growth time was maintained at 4 h, which proved to be the optimal synthetic conditions. The specific synthesis procedure of the NO2-UiO-66@polyacrylonitrile composite nanofiber membrane (NO2-UiO-66@PAN NM) was as follows: First, 10% (w) of PAN spinning liquid was woven into nanofiber membrane using the electrospinning method. Second, a solvent having a TFA content of 30% was prepared in a sealed glass bottle, followed by addition of metal salt (ZrCl4) and organic ligand (2-nitroterephthalic acid, NO2-H2BDC). Finally, the PAN nanofiber was immersed in the precursor mixture, and after 30 min of ultrasonic treatment, it was placed in an oven at 100 ℃ for 4 h to obtain the NO2-UiO-66@PAN NM. The structure of NO2-UiO-66@PAN NM was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TG) and nitrogen adsorption-desorption test. The characterization results showed that the NO2-UiO-66 were uniformly loaded on nanofibers. The load could reach 33.28%, the Brunner-Emmet-Teller measurements (BET) surface area was 504.16 m2/g, and the pore volume was 0.241 cm3/g. Further, the NO2-UiO-66@PAN nanofiber membrane still remained in the stability of the structure after being treated with high temperature (320 ℃), bending and washing with water, acid and alkali. Through the above characterization analysis, it was found that the NO2-UiO-66 loaded on the nanofibers, which enabled the membrane material excellent in physical and chemical stable properties, and has a large application potential under harsh conditions such as toxic and harmful.

Key words: electrospinning, nanofiber, metal-organic framework, NO2-UiO-66, aqueous synthesis