| TiO2/polyaniline composites： An efficient photocatalyst for the degradation of methylene blue under natural light |
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| 作者姓名： | Fang Wang Shi Xiong Min |
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| 作者单位： | Fang Wang Shi Xiong Min~* Department of Chemistry，Key Laboratory of Resource and Environmental Chemistry of West China，Hexi University，Zhangye 734000，China |
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| 基金项目： | We are grateful to financial support from Department of Chemistry and Key Laboratory of Resources and Environmental Chemistry of West China, Hexi University, China. |
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| 摘 要： | Polyaniline (PAn) sensitized nanocrystalline TiO_2 composites (TiO_2/PAn) were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue (MB).The results showed that PAn was able to sensitize TiO_2 efficiently and the composite photocatalyst could be activated by absorbing both the ultraviolet and visible light (λ:190～800nm),whereas pure TiO_2 absorbed ultraviolet light only (λ<380nm).Under the irradiation of natural light,MB could be degraded more efficiently on the TiO_2/PAn composites than on the TiO_2.Furthermore,it could be easily separated from the solution by simple sedimentation.
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| 关 键 词： | 聚苯胺 亚甲基 老化 自然光 |
| 收稿时间： | 9 April 2007 |
| 修稿时间： | 2007-04-09 |
TiO2/polyaniline composites: An efficient photocatalyst for the degradation of methylene blue under natural light |
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| Fang Wang Shi Xiong Min.TiO2/polyaniline composites: An efficient photocatalyst for the degradation of methylene blue under natural light[J].Chinese Chemical Letters,2007,18(10):1273-1277. |
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| Authors: | Fang Wang Shi Xiong Min |
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| Institution: | Department of Chemistry, Key Laboratory of Resource and Environmental Chemistry of West China, Hexi University, Zhangye 734000, China |
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| Abstract: | Polyaniline (PAn) sensitized nanocrystalline TiO2 composites (TiO2/PAn) were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue (MB). The results showed that PAn was able to sensitize TiO2 efficiently and the composite photocatalyst could be activated by absorbing both the ultraviolet and visible light (λ: 190 ∼ 800 nm), whereas pure TiO2 absorbed ultraviolet light only (λ < 380 nm). Under the irradiation of natural light, MB could be degraded more efficiently on the TiO2/PAn composites than on the TiO2. Furthermore, it could be easily separated from the solution by simple sedimentation. |
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| Keywords: | TiO2/PAn Composite photocatalyst Methylene blue Degradation Natural light |
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