应用化学2017，Vol.34Issue(6)：656-663,8.DOI:10.11944/j.issn.1000-0518.2017.06.160382
Bi20TiO32/聚丙烯腈复合纳米纤维的制备及其对异丙隆的光催化降解性能
Preparation of Bi20TiO32/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon
摘要
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.关键词
Bi20TiO32/聚丙烯腈/同轴静电纺/光催化/异丙隆Key words
Bi20TiO32/polyacrylonitrile/coaxial electrospinning/photocatalytic/isoproturon分类
化学化工引用本文复制引用
谢汝义,张琳萍,徐红,钟毅,隋晓锋,毛志平..Bi20TiO32/聚丙烯腈复合纳米纤维的制备及其对异丙隆的光催化降解性能[J].应用化学,2017,34(6):656-663,8.基金项目
国家科技支撑计划项目(2014BAC13B02),教育部留学回国人员科研启动基金资助项目(13W10539) （2014BAC13B02）
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) （No.2014BAC13B02）
