Bi2O3纳米纤维的静电纺丝制备、表征及光催化性能
Electrospinning preparation, characterization and photocatalytic properties of Bi2O3 nanofibers.
作者信息
Wang Changhua, Shao Changlu, Wang Lianjia, Zhang Lina, Li Xinghua, Liu Yichun
机构信息
Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China.
出版信息
J Colloid Interface Sci. 2009 May 1;333(1):242-8. doi: 10.1016/j.jcis.2008.12.077. Epub 2009 Jan 10.
Bi(2)O(3) nanofibers with diameter of 70-200 nm were successfully prepared by electrospinning a precursor mixture of polyacrylonitrile (PAN)/bismuth nitrate, followed by calcination treatment of the electrospun polymer/inorganic composite fibers. The resulting Bi(2)O(3) nanofibers were characterized with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, FT-IR spectra and UV-vis diffuse reflectance spectroscopy. The Bi(2)O(3) nanofibers calcined at 500 degrees C exhibited beta phase, and whereas the nanofibers calcined at 550 and 600 degrees C both exhibited dominant beta phase together with a trace amount of alpha phase. Photocatalytic experiments indicated that the obtained Bi(2)O(3) nanofibers calcined at 500 degrees C were highly active for photodegradation of organic pollutants Rhodamine B (RB). Furthermore, the Bi(2)O(3) nanofibers could be easily recycled without decrease of the photocatalytic activity.
通过静电纺丝聚丙烯腈（PAN）/硝酸铋的前驱体混合物，随后对静电纺丝的聚合物/无机复合纤维进行煅烧处理，成功制备出直径为70 - 200 nm的Bi(2)O(3)纳米纤维。所得的Bi(2)O(3)纳米纤维通过X射线衍射、X射线光电子能谱、扫描电子显微镜、傅里叶变换红外光谱和紫外-可见漫反射光谱进行表征。在500℃煅烧的Bi(2)O(3)纳米纤维呈现β相，而在550℃和600℃煅烧的纳米纤维均呈现主要的β相以及微量的α相。光催化实验表明，在500℃煅烧得到的Bi(2)O(3)纳米纤维对有机污染物罗丹明B（RB）的光降解具有高活性。此外，Bi(2)O(3)纳米纤维可以很容易地回收，且光催化活性不会降低。
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