Preparation and Performance Investigation of PAN/TiO2 Nanofiber Membranes

doi:10.19491/j.issn.1001-9278.2020.04.006

Abstract

Abstract:

Highly efficient and recyclable polyacrylonitrile (PAN)/TiO₂ nanofiber membranes were prepared by means of electrospinning and hydrothermal treatment, and their morphology, crystalline structure, mechanical properties and photocatalytic activity were characterized by SEM, XRD and the degradation efficiency of methylene blue (MB). The results indicated that the fiber diameter was reduced effectively with the addition of tetrabutyl titanate which could be successfully transferred into anatase TiO₂ under the hydrothermal treatment. The strength of the PAN/TiO₂ membranes was found to be higher than that of pure PAN membrane. The membranes exhibited a maximum photocatalytic degradation efficiency of 94.8 % for MB after ultraviolet irradiation for 120 min, and a great photocatalytic activity was maintained for the membranes after five?time recycling.

Key words: polyacrylonitrile, titanium dioxide, nanofiber membrane, electrospinning, photocatalysis

CLC Number:

TQ322.4

Xiaolong LU, Xuanyu LIU, Enpu DING, Beibei ZHANG, Xiang YU, Gang QIN. Preparation and Performance Investigation of PAN/TiO₂ Nanofiber Membranes[J]. China Plastics, 2020, 34(4): 30-34.

Figures/Tables 8

Fig. 1. SEM images of PAN/TiO2 nanofiber membranes

Fig. 2. Diameter distribution of PAN/TiO2 fibers

Fig. 3. TEM images of PT?1

Fig. 4. XRD patterns of PAN/TiO2 nanofiber films

Fig.5. The curves of stress?strain for PAN/TiO2 nanofiber films

样品	断裂强度/MPa	断裂伸长率/%
PAN	4.11	33.24
PT?0.5	5.35	42.56
PT?1	7.84	48.24
PT?2	6.58	56.88

Tab.1. The effect of TiO2 content on mechanical properties of PAN/TiO2 nanofiber membranes

Fig. 6. Degradation curves of PAN/TiO2 nanofibers membranes

Fig. 7. The recycle curves of PT?1

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Preparation and Performance Investigation of PAN/TiO₂ Nanofiber Membranes

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