| 不同光源对TiO2光催化降解染料污染物的影响 |
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| 引用本文： | 王侃,陈英旭,叶芬霞.不同光源对TiO2光催化降解染料污染物的影响[J].太阳能学报,2005,26(1):39-43. |
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| 作者姓名： | 王侃 陈英旭 叶芬霞 |
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| 作者单位： | 1. 浙江大学环境工程系,杭州,310029
2. 宁波高等专科学校化工系,宁波,315016 |
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| 摘 要： | 考察了在紫外光和可见光作为光源时，TiO2光催化降解偶氮染料酸性橙7(AOT)的差异。实验结果表明，在两种不同的光源下，AO7都能够被有效地降解，而且AO7降解都是以C-N化学键的断裂开始的。以可见光作为光源时，AO7分子结构中的苯环较难开环，AO7的矿化率比较低；而以紫外光作为光源时，AO7能够被彻底矿化。另外，以可见光作为光源时，AO7的降解反应主要发生在催化剂的表面，而以紫外光作为光源时，AO7的降解反应主要发生在溶液中。
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| 关 键 词： | TiO2 光催化 紫外光 可见光 染料污染物 |
| 文章编号： | 0254-0096(2005)01- |
PHOTODEGRADATION OF DYE POLLUTANTS OVER TiO2 PARTICLES UNDER UV-Vis LIGHT IRRADIATION |
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| Wang Kan,Chen Yingxu,Ye Fenxia.PHOTODEGRADATION OF DYE POLLUTANTS OVER TiO2 PARTICLES UNDER UV-Vis LIGHT IRRADIATION[J].Acta Energiae Solaris Sinica,2005,26(1):39-43. |
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| Authors: | Wang Kan Chen Yingxu Ye Fenxia |
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| Affiliation: | Wang Kan,Chen Yingxu,Ye Fenxia Department of environmental engineering,Zhejiang University,Hangzhou 310029,China Department of Chemical Engineering,Ningbo College,Ningbo 315016,China |
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| Abstract: | The photodegradation of an azo-dye acid orange 7 (AO7) in water was investigated over TiO_2 particles under UV-Vis light irradiation. Under UV-Vis light irradiation, AO7 can be easily decomposed in the presence of TiO_2 particles and the initial step of the degradation was the break of the single bond of C-N from azo group con- necting with benzene ring. The mineralization rate of AO7 on TiO_2 particles under UV light irradiation was much high than that under visible light irradiation. Moreover, the degradation of AO7 under visible light irradiation oc- curs at the TiO_2 particles surface and not in the solution. In contrast, under UV light irradiation, the degradation takes place in the solution. |
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| Keywords: | TiO_2 photodegradation UV light visible light dye pollutants |
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