以柠檬酸铋铵[Bi(NH3)2C6H7O7.H2O]、仲钨酸铵(H42N10O42W12)、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/Bi2 W1－x Vx O6－δ纤维毡，通过缓慢控温处理制得Bi2 W1－x Vx O6－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Bi2 W1－x Vx O6－δ样品光催化性能.结果表明，所有掺杂 V2 O5的样品光催化活性均高于纯Bi2 WO6样品.其中VO2．5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10 mg/L的MB溶液的降解率可达到86．9％，较纯Bi2 WO6样品提高15％.
Bi2 W1-x Vx O6-δ micro-nanofiber were fabricated via calcining the as-synthesized precursors fibrous mat prepared by electrospinning technique route using Bi(NH3 )2 C6 H7 O7 .H2 O,H42 N10 O42 W12 ,NH4 VO3 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 spectros-copy (XPS)and Ultraviolet-visible diffuse reflectance spectra(UV-Vis).The photocatalytic activity of Bi2 WO6 micro-nanofiber toward the decomposition of Methylene Blue(MB)was investigated.The results indicated that doping V2 O5 could improve the catalytic properties of the Bi2 WO6 catalyst.The results revealed that 3%(V-W at.)VO2.5 doping exhibited the highest photocatalytic activity under visible light irradiation.After visible light irradiation for 120 min,the degradation rate of MB (10 mg/L)reached 86.9%,improved 15% comparing to the pure Bi2 WO6 sample.
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