Dye-sensitized TiO2-catalyzed photodegradation of sulfamethoxazole under blue or yellow light

作者：Lu Norman^*; Yeh Yun Peng; Wang Guan Bo; Feng Tsung Yao; Shih Yang hsin^*; Chen Dong^*

来源：Environmental Science and Pollution Research, 2017, 24(1): 489-499.

DOI：10.1007/s11356-016-7815-6

• Sulfamethoxazole (SMX)
• Visible light irradiation
• Photodegradation
• Emerging contaminant
• Pt-based dye

Visible light-induced photocatalysis is potentially advantageous and could be an efficient approach to degrade contaminants because it can be used to selectively target specific wavelength for decomposition of organic contaminants in water and wastewater. This study demonstrates the photodegradation of sulfamethoxazole (SMX) using [Pt(3,3'-dicarboxy-2,2'-bpy)(1,2-benzenedithiolate)] (Complex 1)-sensitized and [Pt(4,4'-dicarboxy-2,2'-bpy)(1,2-benzenedithiolate)] (Complex 2)-sensitized titanium dioxide (TiO2) under blue or yellow light (420 or 580 nm, respectively) irradiation in water. The Complex 1-sensitized TiO2 photocatalytic oxidation of SMX reached almost 100 % removal under 420 nm irradiation for 3 h in water. In addition, the formation of hydroxyl radicals can be facilitated by bubbling O-2 during the photodegradation in which an effective decomposition of SMX was observed. Based on HPLC and UV-Vis studies of the decomposed products, it was found that SMX underwent cleavage of aromatic rings during the photodegradation process.

• 出版日期2017-1