催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (6): 561-566.

• 研究论文 • 上一篇    下一篇

Fe3+改性纳米ZnO光催化降解壬基酚聚氧乙烯醚

张靖峰,杜志平,赵永红,台秀梅   

  1. 中国日用化学工业研究院山西纳米技术应用研究中心, 山西太原 030001
  • 收稿日期:2007-06-25 出版日期:2007-06-25 发布日期:2011-05-28

Fe3+-Modified Nano-ZnO Photocatalyst and Its Catalytic Activity for Degradation of Nonylphenol Ethoxylate-10

ZHANG Jingfeng, DU Zhiping*, ZHAO Yonghong, TAI Xiumei   

  1. Nanotechnology Applied Research Center of Shanxi Province, China Research Institute of Daily Chemical Industry, Taiyuan 030001, Shanxi, China
  • Received:2007-06-25 Online:2007-06-25 Published:2011-05-28

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842

被引次数

93

摘要： 采用氨浸法制备了不同Fe3+含量的Fe3+/ZnO光催化剂,并用X射线衍射、N2吸附、X射线光电子能谱和紫外-可见漫反射光谱对纳米Fe3+/ZnO进行了表征. 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下考察了纳米Fe3+/ZnO的光催化活性. 结果表明,该方法能成功地将Fe掺杂到ZnO晶体上,且随着Fe3+添加量的增加, ZnO的晶粒尺寸逐渐减小,比表面积逐渐增大. 与纳米ZnO样品相比, Fe3+/ZnO中Fe 2p结合能减小,而Zn 2p和O 1s结合能增大, ZnO表面的羟基氧和吸附氧含量增加,光催化活性提高. 当Fe3+的添加量大于0.5%时, Fe3+/ZnO样品的吸收光谱发生红移,在可见光区出现吸收. 光催化降解结果显示, 0.5%Fe3+/ZnO样品的光催化活性最高,在紫外光和可见光照射3 h后对NPE-10的降解率分别比纯ZnO提高18%和69%.

关键词: 铁, 氧化锌, 可见光, 紫外光, 光催化降解, 壬基酚聚氧乙烯醚, 表面活性剂

Abstract: Fe3+-modified ZnO samples with different amounts of Fe were prepared by the ammonia immersion method. The crystal structure, specific surface area, atomic states on surface, and spectral characteristics were analyzed byX-raydiffraction, N2 adsorption,X-rayphotoelectron spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy, respectively. The photocatalytic activity of Fe3+/ZnO samples for degradation of nonylphenol ethoxylate-10 (NPE-10) was studied under the irradiation with ultraviolet and visible light. The results showed that Fe could be successfully doped on the nano-ZnO crystal. The particle size of Fe3+/ZnO decreased and its specific surface area increased with the increase in doping Fe3+. Compared with the nano-ZnO, the binding energy of Fe 2p in Fe3+/ZnO dropped, but the binding energy of Zn 2p and O 1s increased. The content of adsorbed O and hydroxy O on the surface of Fe3+/ZnO increased remarkably in contrast to that of the pure ZnO sample. The 0.5%Fe3+/ZnO exhibited a red shift in the absorption spectrum. The photocatalytic activity of the 0.5%Fe3+/ZnO sample was highest, and the extra 18% and 69% degradation rate of NPE-10 could be found under3 hirradiation of ultraviolet and visible light, respectively.

Key words: iron, zinc oxide, visible light, ultraviolet light, photodegradation, nonylphenol ethoxylate-10, surfactant