催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (6): 1048-1054.DOI: 10.3724/SP.J.1088.2012.20126

• 研究论文 • 上一篇    下一篇

高比表面积 CuPc/TiO2 纳米管复合材料的制备及其可见光光催化活性

廖兰1, 黄彩霞1,2, 陈劲松1, 吴月婷1,2, 韩志钟1, 潘海波1,2,*, 沈水发1   

  1. 1福州大学化学化工学院, 福建福州 350108; 2福州大学福建省医疗器械和医药技术重点实验室, 福建福州 350002
  • 收稿日期:2012-01-12 修回日期:2012-03-05 出版日期:2012-05-30 发布日期:2012-05-30

Synthesis of CuPc/TiO2 Nanotube Composite Materials with Large Surface Area and Their Photocatalytic Activity under Visible Light

LIAO Lan1, HUANG Caixia1,2, CHEN Jinsong1, WU Yueting1,2, HAN Zhizhong1, PAN Haibo1,2,*, SHEN Shuifa1   

  1. 1College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2Fujian Key Laboratory of Medical Instrument & Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, Fujian, China
  • Received:2012-01-12 Revised:2012-03-05 Online:2012-05-30 Published:2012-05-30

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摘要： 以 P25 为前驱体, 在碱性条件下采用水热法制备了 TiO2 纳米管 (NT), 然后通过浸渍法将敏化剂酞菁铜 (CuPc) 附着于 TiO2NT 表面, 制得可见光响应的 CuPc/TiO2NT 复合光催化材料, 并对其进行了表征, 考察了它在可见光下降解罗丹明 B 的光催化活性. 结果表明, 在 NaOH 碱性条件下水热法制备的 TiO2NT 具有较大的比表面积 (362.6 m2/g) 和高孔容 (2.039 cm3/g), 经 0.2%CuPc 修饰后, 复合材料仍然保持较高的比表面积 (244.2 m2/g) 和孔容 (1.024 cm3/g), 进而提高了 CuPc 与 TiO2 界面的光生电荷转移速率, 使光生电子-空穴能够在此界面上形成有效分离, 从而明显提高了复合材料的光催化活性. 在可见光辐照下, 0.2%CuPc/TiO2NT 复合材料的光催化性能最好, 反应 180 min 时, 罗丹明 B 的降解率可达 59%, 比 TiO2NT 的提高了 3.3 倍.

关键词: 二氧化钛, 纳米管, 酞菁铜, 染料敏化, 可见光, 罗丹明 B

Abstract: TiO2-based nanotubes (TiO2NT) were synthesized by hydrothermal treatment under the alkaline conditions using P25 as the raw material. Then copper phthalocyanine (CuPc) was chosen as a sensitizer to prepare CuPc modified TiO2NT composite material (CuPc/TiO2NT) by the immersion method. The structure and properties of the samples were characterized, and the photocatalytic activity of pure TiO2NT and CuPc/TiO2NT was also evaluated by degradating rhodamine B under the visible light. The results showed that the TiO2NT had large surface area (362.6 m2/g) and high pore volume (2.039 cm3/g). Even after modified by CuPc, the composite material still kept the high surface area (244.2 m2/g) and pore volume (1.024 cm3/g) for 0.2%CuPc/TiO2NT. The decrease of recombination of photo-injected electrons is expected to appear attributing to the effective charge separation on the interface of TiO2NT and CuPc, improving the transfer efficiency of the photo-excited charges under visible light. Furthermore, the catalyst exhibited obvious visible photocatalytic activity after sensitized by CuPc. As the mole percentage of CuPc was 0.2% in the composite, the degradation rate of rhodamine B over 0.2%CuPc/TiO2NT could reach 59%, increasing by 3.3 times compared with pure TiO2NT after reaction for 180 min.

Key words: titanium dioxide, nanotube, copper phthalocyanine, sensitizing, visible light, rhodamine B