电纺煅烧制备TiO_2纳米纤维及其可见光光催化性能

TiO_2 Nanofibers Prepared by Electrospinning-Calcining Technology and the Visible Light Photocatalytic Properties

采用静电纺丝-煅烧技术制备了Fe、C、N共掺杂Ti O2纳米纤维,并对其在可见光条件下降解亚甲基蓝模拟染料废水的性能进行了研究.探讨了Fe掺杂量和煅烧温度对Fe/C/N-Ti O2纳米纤维的可见光光催化活性的影响.结果表明,在nFe/nTi为1.5%、煅烧温度为400℃、煅烧时间为1 h的条件下,所制备的Fe/C/N-Ti O2纳米纤维的直径约为(110±50)nm,比表面积达127.48 m2·g-1,Ti O2晶相为锐钛矿相,且Fe、C、N分别以一定的形式掺杂于Ti O2晶格中.同时,在可见光光照2 h下,该纳米纤维对亚甲基蓝的光催化降解率可达98.3%,说明所制备的Fe/C/N-Ti O2纳米纤维具有较高的可见光光催化活性,有望在可见光光降解去除水中有机污染物中获得应用.

Fe,C and N co-doped TiO2 nanofibers were prepared through electrospinning combined with calcining technology. The photocatalytic properties of the resultant Fe/C/N-TiO2 nanofibers for methylene blue（MB） degradation under visible light irradiation were investigated. It is clear that the Fe/C/N-TiO2 nanofibers obtained from Fe/Ti molar ratio of 1. 5% at the calcinations temperature of 400 ℃ for 1 h show an anatase-typed phase with a diameter range of（110 ± 50） nm and a BET surface area of 127. 48 m^2·g^-1. Fe,C and N are doped onto TiO2 lattice in a certain form. The degradation ratio of methylene blue on the resultant Fe/C/N-TiO2 nanofibers is determined as high as 98. 3% under the visible light irradiation for 2 h,suggesting that the prepared nanofibers are a candidate catalyst applied for removal of organic contamination from water.