NiO-TiO_2同轴纳米纤维的制备及光催化

Preparation and photocatalytic properties of NiO-TiO_2 coaxial nanofibers

以PVP/Ti(OC4H9)4溶胶为壳层,以PVP/Ni(CH3 COO)2·4H2O溶胶为核层,采用同轴静电纺丝法制备了核壳结构Ti(OC4H9)4/Ni(CH3COO)2·4H2O PVP纤维;用程序升温法,在550℃下烧结6 h,制备了NiO-TiO2同轴纳米纤维。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、红外吸收光谱(FTIR)、热重(TG)等测试技术对复合纳米纤维的结构和性能进行了表征,并研究了该催化剂在紫外光照射下对亚甲基蓝溶液的催化降解性能。结果表明,NiO-TiO2同轴纳米纤维具有很好的光催化活性,而且该复合催化剂可以循环使用。

Ti（OC4H9）4/Ni（CH3COO）2·4H2O PVP fibers were prepared by coaxial electrospinning using PVP/Ni（CH3COO）2·4H2O sol as the core and PVP/Ti（OC4H9）4 sol as the shell,and then Ti（OC4H9）4/ Ni（CH3COO）2·4H2O PVP fibers were heated at 550 ℃ for 6 h to obtain NiO-TiO2 coaxial nanofibers.The structure and properties of the NiO-TiO2 coaxial fibers were investigated using XRD,SEM,FTIR and TG.The photocatalytic properties of NiO-TiO2 coaxial nanofibers were studied by the degradation of methylene blue under UV irradiation.In comparing with TiO2 nanofibers,the NiO-TiO2 coaxial nanofibers exhibite higher photocatalytic activity for the degradation of methylene blue,and the catalyst could be used repeatedly.