可见光响应聚丙烯腈纤维膜的制备及其光催化性能

Preparation and visible light photocatalytic property of visible light-induced polyacrylonitrile nanofibers mat

通过静电纺丝及后续的水热处理工艺制备载有二氧化钛的聚丙烯腈纤维膜,该纤维膜具有可见光响应光催化性能。静电纺丝得到的初生纤维中含有钛酸四丁酯、硝酸钆、聚丙烯腈和聚乙烯吡咯烷酮,纤维表面光滑(直径约为320 nm)。再将初生纤维膜置于特氟龙水热釜中进行水热处理;纤维变成表面凹凸不平的多孔纤维(直径约为350 nm,BET比表面积为17.45 m2/g);结合XPS和XRD测试结果证实载有anatase相二氧化钛(Gd/N-Ti O2)晶体的聚丙烯腈纤维膜制备成功。在室温条件下,这种有机/无机杂化纤维膜对罗丹明B水溶液具有明显的可见光降解效果。

TiO2 were fabricated on electrospun polyacrylonitrile （PAN） nanofibers via the coupling of electrospinning process and hydrothermal treatment, and the resulted nanofiber mat has visible light induced photocatalystical properties. The surface of as-formed fibers containing Tetrabutyl titanate, gadolinium nitrate, PAN and polyvinylpirrolidone was smooth and the average diameter was about 320 nm. Then the as-formed fibers were transferred into Teflon-lined stainless steel autoclave for hydrothermal treatment. The surface of the resulted porous fibers （the diameter is about 350 nm） was uneven and the Brunauer-Emmett-Teller （BET） surface area was 17.45 m2/g. XPS and XRD results showed that PAN fiber mats loaded with anatase （ Gd/N-TiO2） crystals have been produced. Finally, the resulted polymer-inorganic hybrid nanofiber mats exhibited obvious photocatalytic activity to degrade rhodamine B dye under visible light.