Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (03): 58-63.doi: 10.13475/j.fzxb.20201201106

• Fiber Materials • Previous Articles     Next Articles

Preparation and performance of modified polyacrylonitrile fibers photocatalyst with MIL-53(Fe)

DENG Yang1, SHI Xianbing1, WANG Tao1, LIU Liwei2, HAN Zhenbang1()   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. Tianjin Yunda Industry and Trade Co., Ltd., Tianjin 301600, China
  • Received:2020-12-04 Revised:2021-12-30 Online:2022-03-15 Published:2022-03-29
  • Contact: HAN Zhenbang E-mail:hzbang@aliyun.com

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Abstract:

MIL-53(Fe) powder suffers from limited photoabsorption, low catalytic efficiency and poor recycling ability in the application of photocatalysis. A highly efficient MIL-53(Fe) photocatalyst was constructed with irregular structure via an in-situ synthesis method using amidoximated polyacryloni-trile(PAN) fiber as the support. The surface morphology, microstructure and light absorption performance of the photocatalyst were characterized and analyzed by scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy and UV-Vis diffuse reflectance spectroscopy, and the photocatalytic performance was evaluated by the degradation of an organic dye. The results indicate that the in-situ synthesized MIL-53(Fe) are evenly distributed on the modified PAN fibrous support, and partial MIL-53(Fe) exhibit certain crystalline properties. Furthermore, the fibrous ligand greatly extends the spectral response of MIL-53(Fe) to 800 nm through ligand-to-metal charge transfer (LMCT) effect. Benefiting from the synergistic effect of fiber ligand and terephthalic acid ligand, the in-situ produced MIL-53(Fe) shows high photocatalytic activity for dye degradation under visible light irradiation, much superior to the MIL-53(Fe) powder and the fiber supported MIL-53(Fe) using a direct combination method. The findings provide a novel approach to design high-efficiency photocatalysts based on metal organic framework materials.

Key words: metal organic frameworks, modified polyacrylonitrile fiber, in-situ synthesis, photocatalyst, dye degradation, wastewater treatment

CLC Number: 

  • TQ619.2

Fig.1

SEM images of AO-PAN and MIL-53(Fe)-PAN and element distribution of MIL-53(Fe)-PAN(×1 000). (a) SEM image of AO-PAN; (b) SEM image of MIL-53(Fe)-PAN; (c) EDAX picture of MIL-53(Fe)-PAN; (d) Fe distribution map of MIL-53(Fe)-PAN"

Fig.2

XRD pattern of AO-PAN and MIL-53(Fe) series catalysts"

Fig.3

FT-IR spectra of AO-PAN and MIL-53(Fe) series catalysts"

Fig.4

UV-Vis DRS spectra of AO-PAN and MIL-53(Fe) series catalysts"

Fig.5

Degradation curves of RhB for MIL-53(Fe) series catalysts"

Fig.6

Effect of conversion rate of cyano group of AO-PAN on MIL-53(Fe)-PAN activity"

Fig.7

Effect of scavengers on photocatalytic degradation rate of RhB with MIL-53(Fe)-PAN"

Fig.8

Effect of solution pH on photocatalytic activity of MIL-53(Fe)-PAN"

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