中文摘要：

以柠檬酸铋铵[Bi（NH3）2C6H7O7·H2O]、仲钨酸铵（H（42）N（10）O（42）W（12））、偏钒酸铵（NH4VO3）和聚乙烯吡咯烷酮（PVP）为原料,采用静电纺丝法成功制备前驱体PVP/Bi2W（1-x）VxO（6-δ）纤维毡,通过缓慢控温处理制得Bi2W（1-x）VxO（6-δ）微纳米纤维。采用X射线衍射光谱（XRD）、傅立叶红外光谱（FT-IR）、场发射扫描电子显微镜（FE-SEM）、X射线光电子能谱（XPS）和紫外-可见漫反射光谱（UV-Vis）对样品进行了表征。以亚甲基蓝（MB）光降解为模型反应,研究Bi2W（1-x）VxO（6-δ）样品光催化性能。结果表明,所有掺杂V2O5的样品光催化活性均高于纯Bi2WO6样品。其中VO（2.5）掺杂量为3%（原子分数）时光催化效果最好,可见光下120 min内对初始浓度为10mg/L的MB溶液的降解率可达到86.9%,较纯Bi2WO6样品提高15%。

英文摘要：

Bi2W（1-x）VxO（6-δ） micro-nanofiber were fabricated via calcining the as-synthesized precursors fibrous mat prepared by electrospinning technique route using Bi（NH3）2C6H7O7·H2O,H（42）N（10）O（42）W（12）,NH4VO3 and PVP as regent.The obtained samples were characterized by X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FT-IR）,Field emission scanning electron microscopy（FE-SEM）,X-ray photoelectron spectroscopy（XPS）and Ultraviolet-visible diffuse reflectance spectra（UV-Vis）.The photocatalytic activity of Bi2WO6 micro-nanofiber toward the decomposition of Methylene Blue（MB）was investigated.The results indicated that doping V2O5 could improve the catalytic properties of the Bi2WO6 catalyst.The results revealed that 3%（V-W at.）VO（2.5） doping exhibited the highest photocatalytic activity under visible light irradiation.After visible light irradiation for 120 min,the degradation rate of MB（10mg/L）reached 86.9%,improved 15%comparing to the pure Bi2WO6 sample.