Preparation of Bi20TiO32/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon

doi:10.11944/j.issn.1000-0518.2017.06.160382

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (6): 656-663.DOI: 10.11944/j.issn.1000-0518.2017.06.160382

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Preparation of Bi₂₀TiO₃₂/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon

XIE Ruyi,ZHANG Linping(),XU Hong,ZHONG Yi,SUI Xiaofeng,MAO Zhiping()

Key Laboratory of Science and Technology of Eco-textile,Ministry of Education, Donghua University,Shanghai 201620,China

Received:2016-09-21 Accepted:2017-01-17 Published:2017-05-31 Online:2017-05-31
Contact: ZHANG Linping,MAO Zhiping
Supported by:
Supported by the National Key Technology Research and Development Program(No.2014BAC13B02), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry(No.13W10539)

Abstract

Abstract:

Visible-light responsive photocatalyst Bi₂₀TiO₃₂ was prepared through solvothermal method. To achieve the immobilization of photocatalysts, Bi₂₀TiO₃₂/polyacrylonitrile(PAN) composite nanofibers with different content of Bi₂₀TiO₃₂ were prepared by coaxial electrospinning method. Through this approach, the photocatalysts could be easily recycled, meanwhile, the contact area between photocatalysts and organic pollutants was enhanced during the degradation reaction. The prepared samples were characterized by X-ray diffraction spectra(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), ultraviolet-visible(UV-Vis) diffuse reflectance spectra(UV-Vis DRS) and N₂ adsorption-desorption analysis. The photocatalytic activities of Bi₂₀TiO₃₂/PAN composite nanofibers were evaluated by the degradation of isoproturon herbicide under visible-light irradiation. The results show that the prepared Bi₂₀TiO₃₂ photocatalyst with a band gap energy 2.35 eV has a typical visible-light responsive property. The diameters of Bi₂₀TiO₃₂/PAN composite nanofibers are 600~700 nm. Bi₂₀TiO₃₂ is successfully loaded on the surface of nanofibers by this method and the composite materials have obvious visible-light responsibilities. The prepared samples exhibit great photocatalytic activity for degradation of isoproturon. The sample S3 at photocatalyst content 25.7% exhibits the highest removal efficiency of 87%. This research indicates that the photocatalysts immobilized on the organic nanofibers surface can retain their original photocatalytic activity. Coaxial electrospinning technology is a proper approach for the immobilization of photocatalysts.

Key words: Bi20TiO32, polyacrylonitrile, coaxial electrospinning, photocatalytic, isoproturon

XIE Ruyi, ZHANG Linping, XU Hong, ZHONG Yi, SUI Xiaofeng, MAO Zhiping. Preparation of Bi₂₀TiO₃₂/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon[J]. Chinese Journal of Applied Chemistry, 2017, 34(6): 656-663.

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Preparation of Bi₂₀TiO₃₂/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon

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