高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (4): 695.doi: 10.7503/cjcu20131249

• 研究论文: 无机化学 • 上一篇    下一篇

F-离子对C掺杂 Nb2O5纳米粒子生长及光催化性能的影响

丁双, 王润伟(), 张宗弢, 裘式纶   

  1. 吉林大学无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2013-12-19 出版日期:2014-04-10 发布日期:2014-02-25
  • 作者简介:联系人简介: 王润伟, 男, 博士, 副教授, 主要从事新型无机催化材料的开发和催化材料性质的表征研究. E-mail: rwwang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 20971052, 20770141)资助

Effects of F- on the Growth and Photocatalytic Activity of C-doped Nb2O5 Nanocrystals

DING Shuang, WANG Runwei*(), ZHANG Zongtao, QIU Shilun   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
  • Received:2013-12-19 Online:2014-04-10 Published:2014-02-25
  • Contact: WANG Runwei E-mail:rwwang@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.20971052, 20770141)

摘要:

在合成C掺杂Nb2O5的基础上, 通过引入F-离子合成出具有更高光催化活性的C, F共掺杂Nb2O5光催化材料, 对合成样品进行了分析、 表征并测试了其光降解罗丹明B的活性, 研究了F-离子对C掺杂Nb2O5纳米粒子生长及光催化性能的影响. 结果表明, 在合成过程中引入F-离子能够促进Nb2O5纳米晶的生长, 尤其是沿[001]方向的生长. 实验结果还表明, F未进入Nb2O5纳米晶的晶格内部, 而是以F-离子的形式分散在Nb2O5纳米结构中, 通过促进Nb2O5表面·OH自由基的产生, 起到提高合成样品光催化活性的作用.

关键词: F-离子, C掺杂Nb2O5, 可见光, 光催化

Abstract:

C and F co-doped Nb2O5 photocatalysts were prepared by introducing F- ions to C-doped Nb2O5. The effects of F- ions on the growth and photocatalytic activity of Nb2O5 nanocrystals were studied. The synthesized samples were characterized by XRD, SEM, TEM, N2 adsorption-desorption, XPS, UV-Vis and photodegradation of RhB. The experimental results indicate that the F- ions can promote the growth of Nb2O5 nanocrystals, especially along the direction of [001]. The results also show that the F- ions are not incorporated into the lattice of Nb2O5 by occupying the O atoms, but physically adsorbed on the surface of Nb2O5 nanocrystals. The fluorination over the surface of C-doped Nb2O5 can enhance the generation of free ·OH radicals thus accelerate the photocatalytic reaction.

Key words: F- ion, C-doped Nb2O5, Visible light, Photocatalysis

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