?二酰亚胺敏化TiO2可见光光催化降解罗丹明B

北京大学学报（自然科学版）

?二酰亚胺敏化TiO₂可见光光催化降解罗丹明B

赵凤伟,尚静,李佳

北京大学环境科学与工程学院, 北京100871;

收稿日期:2009-05-02 出版日期:2010-03-20 发布日期:2010-03-20

Visible-Light Photocatalytic Degradation of Rhodamine B Using Perylene Diimide Sensitized TiO₂ Photocatalyst

ZHAO Fengwei, SHANG Jing, LI Jia

College of Environmental Sciences and Engineering, Peking University, Beijing 100871;

Received:2009-05-02 Online:2010-03-20 Published:2010-03-20

摘要/Abstract

摘要： 采用水热法制备了?二酰亚胺(PTCDI) 敏化的光催化剂 TiO₂/ PTCDI 以及 PTCDI 和酞菁铜( CuPc) 共敏化的可见光光催化剂(TiO₂/ PTCDI) -CuPc。利用 XRD, TEM 和 UV-Vis 光谱对催化剂进行表面形貌和结构表征。以罗丹明 B 的光催化降解为模型反应, 考察敏化样品的可见光光催化性能。研究表明染料共敏化样品( TiO₂ / PTCDI) - CuPc 的活性比TiO₂和 TiO₂ / PTCDI 分别提高了223% 和 113% 。应用能带结构理论, 阐明了TiO₂ / PTCDI 和( TiO₂ / PTCDI) -CuPc 的光生电子转移路径和光催化降解机理。

关键词: ?二酰亚胺, 酞菁铜, 染料敏化, 可见光光催化, 罗丹明B

Abstract: Dye-sensitized TiO₂ photocatalysts using perylene diimide( ab. TiO₂ /PTCDI ) and co-sensitized using Perylenediimide( PTCDI) and copper phthalocyanine ( CuPc) ( ab. ( TiO₂ / PTCDI) -CuPc) as sensitizing compound were prepared by hydrothermal method. The crystalline structure and surface properties of the samples were characterized by XRD, TEM and UV-Vis spectra. The photocatalytic degradation of RhB under visible light illumination was used as the model reaction to investigate the photocatalytic activities of dye-sensitized TiO2 samples. The results show that the photocatalytic activity of co-sensitized photocatalyst ( TiO₂ / PTCDI) -CuPc was higher than that of TiO₂ and TiO₂ / PTCDI, by the extent of 223% and 113% , respectively. According to the band theory, the electron transfer processes and photocatalytic degradation mechanism of TiO₂ /PTCDI and ( TiO₂ / PTCDI) -CuPc were explained.

Key words: perylene diimide, copper phthalocyanine, dye sensitization, visible-light photocatalysis, rhodamine B

中图分类号:

X131

赵凤伟,尚静,李佳. ?二酰亚胺敏化TiO₂可见光光催化降解罗丹明B[J]. 北京大学学报（自然科学版）.

ZHAO Fengwei,SHANG Jing,LI Jia. Visible-Light Photocatalytic Degradation of Rhodamine B Using Perylene Diimide Sensitized TiO₂ Photocatalyst[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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链接本文: https://xbna.pku.edu.cn/CN/

https://xbna.pku.edu.cn/CN/Y2010/V46/I2/293

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?二酰亚胺敏化TiO₂可见光光催化降解罗丹明B

Visible-Light Photocatalytic Degradation of Rhodamine B Using Perylene Diimide Sensitized TiO₂ Photocatalyst

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