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Acta Phys. -Chim. Sin.  2013, Vol. 29 Issue (01): 157-166    DOI: 10.3866/PKU.WHXB201210152
CATALYSIS AND SURFACE SCIENCE     
Preparation of Grafted PTFE Fiber Metallic Complexes and Their Photocatalytic Degradation Abilities
DING Zhi-Zhong1, DONG Yong-Chun1,2, LI Bing1, LI Miao1
1 Division of Textile Chemistry & Ecology, School of Textiles, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
2 State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, P. R. China
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Abstract  

Polyacrylic acid grafted polytetrafluoroethylene (PAA-g-PTFE) fibers were coordinated with Fe3+ ions and with a mixture of Cu2+ and Fe3+ ions to prepare PAA-g-PTFE Fe and Cu-Fe bimetallic complexes. The chemical structures and light adsorption properties of the complexes were characterized using Fourier transform infrared (FTIR) spectrometry and UV-Vis diffuse reflection spectroscopy (DRS), respectively. The complexes were used as heterogeneous photo-Fenton catalysts in the oxidative degradation of the azo dye, Reactive Blue 222, in different pH aqueous media. The results indicate that Fe3+ coordinates with six carboxyl groups grafted on the surface of PAA-g-PTFE in the presence or absence of Cu2+ ion, and improved light adsorption properties are achieved in the UV and visible regions. When both metal ions coexist in solution, the Cu2+ ion coordinates more easily with PAA-g-PTFE than Fe3+ to produce a PAA-g-PTFE Cu-Fe bimetallic complex. Moreover, PAA-g-PTFE Fe significantly increases the degradation of Reactive Blue 222 in the pH range 3-9 under visible irradiation. However, at high pH conditions (> 7) the catalytic ability is reduced. Increasing the Fe content, and especially incorporating Cu2+ ions in the complex, dramatically improves the catalytic reusability at high pH value.



Key wordsPolytetrafluoroethylene fiber      Metallic complex      Coordination structure      Photocatalysis      Fenton reaction      Dye degradation     
Received: 20 August 2012      Published: 15 October 2012
MSC2000:  O643.2  
Fund:  

The project was supported by the Tianjin Municipal Science and Technology Committee for a Research Program of Application Foundation and Advanced Technology (11JCZDJ24600) and National Natural Science Foundation of China (20773093).

Cite this article:

DING Zhi-Zhong, DONG Yong-Chun, LI Bing, LI Miao. Preparation of Grafted PTFE Fiber Metallic Complexes and Their Photocatalytic Degradation Abilities. Acta Phys. -Chim. Sin., 2013, 29(01): 157-166.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201210152     OR     http://www.whxb.pku.edu.cn/Y2013/V29/I01/157

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