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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (17): 1551-1553.    下一篇

研究通讯

可见光照射下SiW12O404-/Resin光催化剂活化可见光照射下SiW12O404-/Resin光催化剂活化H2O2降解染料的研究

雷鹏翔，陈春城，马万红，赵进才*   

  1. (中国科学院化学研究所光化学实验室 北京 100080)
  • 投稿日期:2005-03-08 修回日期:2005-05-24 发布日期:2010-12-10
  • 通讯作者: 赵进才

Degradation of Dyes by Photocatalyst SiW12O404-/Resin with H2O2 under Visible Light Irradiation

LEI Peng-Xiang,CHEN Chun-Cheng,MA Wan-Hong,ZHAO Jin-Cai*   

  1. (Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080)
  • Received:2005-03-08 Revised:2005-05-24 Published:2010-12-10
  • Contact: ZHAO Jin-Cai

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将杂多酸(SiW12O404-)负载到阴离子交换树脂上, 得到SiW12O404-/Resin (SWR)固相光催化剂, 在可见光的照射下, 可以有效地活化H2O2降解染料. 以罗丹明B (Rhodamine B, RhB)为模型化合物, 研究了不同条件下RhB的降解动力学, 以及降解过程中其UV-vis光谱及体系的总有机碳(Total Organic Carbon, TOC)变化情况, 结果表明RhB的共轭芳环结构被破坏, 矿化率为24.2%. 其它染料如孔雀绿(Malachite Green, MG)和吖啶橙(Acridine Orange, AO)等也可以被降解和矿化. 催化剂的循环实验表明SWR固相光催化剂易于分离, 并且具有良好的稳定性, 可以重复利用.

关键词: 杂多酸, 树脂, 光催化剂, 降解, 总有机碳, 矿化

A heterogeneous polyoxometalate photocatalyst, SiW12O404-/Resin (SWR), was obtained by loading SiW12O404- on an anionic exchange resin and used to activate H2O2 for the efficient degradation of dyes under visible light irradiation. Rhodamine B (RhB) was employed as a model compound for the kinetic study in the photoreaction. The variations of the UV-vis spectra of RhB and the total organic carbon changes of the system indicated that the aromatic structure of RhB dye was decomposed, with a mineralization content of 24.2%. Similarly, dyes such as malachite green and acridine orange could also be degraded and mineralized. The recycle experiment suggested the excellent stability and reusability of the heterogeneous SWR photocatalyst.

Key words: polyoxometalate, resin, photocatalyst, degradation, total organic carbon, mineralization