Degradation of dye pollutants by immobilized polyoxometalate with H2O2 under visible-light irradiation
文献类型：期刊论文
| 作者 | Lei, PX; Chen, CC; Yang, J; Ma, WH; Zhao, JC; Zang, L |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2005-11-01 |
| 卷号 | 39期号:21页码:8466-8474 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/es050321g |
| 英文摘要 | A Keggin polyoxometalate (POM, i.e., PW12O403-) and its lacunary derivative are immobilized on an anionic exchange resin through electrostatic interaction at pH 4.6 in an aqueous dispersion. The resin-supported POM thus obtained catalyzes the efficient degradation of cationic dye pollutants in the presence of H2O2 under visible-light irradiation. To evaluate the photocatalytic system, degradation of a rhodamine B (RB) dye was investigated in detail using UV-visible spectroscopy, high performance liquid chromatography, and gas chromatography/mass spectrometry techniques to identify the intermediates and final products. Fluorescence lifetime measurements revealed the electron transfer from the visible-light-excited RB molecules to the POMs. Electron paramagnetic resonance measurements, investigation of the effects of (OH)-O-circle and (OOH)-O-circle scavengers on the photoreaction kinetics, and IR analysis indicated that de-ethylation of RB was due to (OOH)-O-circle radicals, but the decomposition of the conjugated xanthene structure was caused by the peroxo species formed by interaction of H2O2 with the lacunary POM loaded on the resin. A total organic carbon removal of ca. 22% was achieved, and the recycle experiment suggested excellent stability and reusability of the heterogeneous catalyst. On the basis of the experimental results, a photocatalytic mechanism is discussed. |
| 语种 | 英语 |
| WOS记录号 | WOS:000233078000056 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56219]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhao, JC |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Photochem, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China 2.So Illinois Univ, Dept Chem & Biochem, Carbondale, IL 62901 USA |
| 推荐引用方式 GB/T 7714 | Lei, PX,Chen, CC,Yang, J,et al. Degradation of dye pollutants by immobilized polyoxometalate with H2O2 under visible-light irradiation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2005,39(21):8466-8474. |
| APA | Lei, PX,Chen, CC,Yang, J,Ma, WH,Zhao, JC,&Zang, L.(2005).Degradation of dye pollutants by immobilized polyoxometalate with H2O2 under visible-light irradiation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,39(21),8466-8474. |
| MLA | Lei, PX,et al."Degradation of dye pollutants by immobilized polyoxometalate with H2O2 under visible-light irradiation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 39.21(2005):8466-8474. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。