催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (6): 571-576.

• 研究论文 • 上一篇    下一篇

纳米V2O5/ZnO光催化剂对壬基酚聚氧乙烯醚降解的催化活性

胡利利,杜志平,台秀梅,李秋小,赵永红   

  1. 中国日用化学工业研究院, 山西太原 030001
  • 收稿日期:2008-06-25 出版日期:2008-06-25 发布日期:2012-04-28

Catalytic activity of nano-V2O5/ZnO photocatalyst for degradation of nonylphenyl poly(oxyethylene)ether

HU Lili, DU Zhiping*, TAI Xiumei, LI Qiuxiao, ZHAO Yonghong   

  1. China Research Institute of Daily Chemical Industry, Taiyuan 030001, Shanxi, China
  • Received:2008-06-25 Online:2008-06-25 Published:2012-04-28

PDF

1075

被引次数

24

摘要： 采用氨浸法制备了不同V2O5含量的纳米V2O5/ZnO光催化剂,并用X射线衍射、比表面积测定、透射电镜、X射线光电子能谱和漫反射紫外-可见光谱测定了催化剂的晶型、比表面积、形貌尺寸、表面组成和光谱特征. 以壬基酚聚氧乙烯醚(NPE-10)为模型污染物,分别在紫外光和可见光照射下考察了光催化剂的催化活性. 结果表明,随着V2O5含量的增加, V2O5/ZnO的粒径逐渐减小,比表面积逐渐增大. 与纳米ZnO样品相比, V2O5/ZnO中V 2p的结合能减小,而Zn 2p和O 1s的结合能增大, V2O5/ZnO表面的羟基氧和吸附氧含量增加.n(V)/n(Zn)=2.5%的V2O5/ZnO光催化剂样品的催化活性最高(在紫外光和可见光照射3 h后, NPE-10降解率分别约为79%和62%).

关键词: 五氧化二钒, 氧化锌, 光催化剂, 紫外光, 可见光, 壬基酚聚氧乙烯醚, 降解

Abstract: The nano-V2O5/ZnO photocatalyst samples with different V2O5 contents were prepared by the ammonia immersion method. The crystal structure, specific surface area, particle morphology, surface composition, and spectral characteristics were analyzed byX-raydiffraction, N2 adsorption, transmission electron microscopy,X-rayphotoelectron spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy, respectively. The catalytic activity of the V2O5/ZnO photocatalyst samples for degradation of nonylphenyl poly(oxyethylene)ether(NPE-10) was measured under the irradiation with ultraviolet light and visible light. The crystal size of V2O5/ZnO decreased but its specific surface area increased slightly with the increase of V2O5 content. Compared with the nano-ZnO, the binding energy of V 2p in V2O5/ZnO decreased, but the binding energy of Zn 2p and O 1s increased. The amounts of hydroxyl oxygen and adsorbed oxygen on the V2O5/ZnO surface increased remarkably in contrast to those of the ZnO sample. The catalytic activity of the 2.5% V2O5/ZnO photocatalyst (where 2.5% meansn(V)/n(Zn)value) was the highest, and the degradation rate of NPE-10 was about 79% and 61% under the irradiation of ultraviolet light and visible light for3 h, respectively.

Key words: vanadic oxide, zinc oxide, photocatalyst, ultraviolet light, visible light, nonylphenyl poly(oxyethylene)ether, degradation