Electrospun BiOCl@UiO-66-NH2@TSPAN nanofibers for visible-light-driven Cr(VI)photocatalytic reduction
Herein,to improve the photocatalytic activity of UiO-66-NH2,electrospun polyacrylonitrile nanofibers treated by thermal oxidative stabilization(TSPAN)were used as supports for in-situ loading of UiO-66-NH2 and BiOCl crystals by solvothermal method,designing and constructing flexible BiOCl@UiO-66-NH2@TSPAN composite nanofibers.The performance of the composite nanofibers for visible light-driven Cr(Ⅵ)photocatalytic reduction was investigated.The results showed that UiO-66-NH2 and BiOCl could be uniformly loaded onto the surface of the TSPAN nanofibers.Due to the introduction of BiOCl,BiOCl/UiO-66-NH2 heterojunction was formed,which improved the visible light response of the composite nanofibers,reduced the recombination rate of photo-generated electron-hole pairs,and then exhibited enhanced visible light-driven photocatalytic activity for the reduction of Cr(Ⅵ).The reduction rate reached 100%within 120minutes.After five cycles,the composite nanofibers maintained good stability and the photocatalytic reduction efficiency for Cr(Ⅵ)was still above 90%.In addition,they were flexible and could be quickly and conveniently separated from the reaction solution.
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