Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (2): 276-280. Previous Articles     Next Articles

Reports

碲化镉量子点光催化降解溴化乙锭的研究

刘晔1,2,向蓉1,2,黄菊1,2,李东辉*,2   

  1. (1厦门大学生命科学学院 厦门 361005)
    (2厦门大学医学院抗癌研究中心 厦门 361005)
  • 投稿日期:2007-01-29 修回日期:2007-07-03 发布日期:2008-01-28
  • 通讯作者: 李东辉

Degradation of Ethidium Bromide Using CdTe Quantum Dots as Photo-catalysts

LIU Ye1,2 XIANG Rong1,2 HUANG Ju1,2 LI Dong-Hui*,2   

  1. (1 School of Life Sciences, Xiamen University, Xiamen 361005)
    (2 Cancer Research Center, Medical College, Xiamen University, Xiamen 361005)
  • Received:2007-01-29 Revised:2007-07-03 Published:2008-01-28
  • Contact: LI Dong-Hui

CdTe quantum dots (QDs) were prepared in an aqueous solution using thioglycollic acid as a stabilizing agent. After an appropriate illumination and storage, the photoluminescence (PL) and stability of the CdTe nanoparticles were enhanced. Then the water-soluble and highly stable QDs were used as a photo-catalyzer for the degradation of ethidium bromide (EB). Factors that concern fluorescent CdTe with a photocatalysis reaction including pH and irradiation time were investigated. Absorption of the photocatalysis reaction mixture suggested the decolorization of EB. Effect on the relative fluorescence intensity of EB shows that the rate of degradation can be 90% in water after 4 h under UV irradiation. Moreover, CdTe QDs also worked in agarose gel, in which EB was used as an intercalating fluorescence probe for the recognition of nucleic acids.

Key words: quantum dot, CdTe, ethidium bromide, photo-catalysis, photodegradation of dye