摘要
采用水热法制备了苝二酰亚胺(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。
Dye-sensitized TiO2 photocatalysts using perylene diimide (ab. TiO2/PTCDI ) and co-sensitized using Perylenediimide(PTCDI) and copper phthaloeyanine (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 photoeatalytie activities of dye-sensltized 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 photoeatalytic degradation mechanism of TiO2/PTCDI and (TiO2/PTCDI) -CuPe were explained.
出处
《北京大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第2期293-297,共5页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家重点基础研究发展计划项目(2002CB410802)
国家自然科学基金(20407002)
环境模拟与污染控制国家重点联合实验室(北京大学)专项基金资助
关键词
苝二酰亚胺
酞菁铜
染料敏化
可见光光催化
罗丹明B
perylene diimide
copper phthalocyanine
dye sensitization
visible-light photocatalysis
rhodamine B