Mixed phase titania nanocomposite codoped with metallic silver and vanadium oxide: New efficient photocatalyst for dye degradation

作者：Yang, Xia; Ma, Fengyan; Li, Kexin; Guo, Yingna; Hu, Jianglei; Li, Wei; Huo, Mingxin^*; Guo, Yihang

来源：Journal of Hazardous Materials, 2010, 175(1-3): 429-438.

DOI：10.1016/j.jhazmat.2009.10.024

• Silver
• Vanadium oxide
• Titania
• Nanocomposite
• Dye
• Photocatalysis

Titania nanocomposite codoped with metallic silver and vanadium oxide was prepared by a one-step sol-gel-solvothermal method in the presence of a triblock copolymer surfactant (P123). The resulting Ag/V-TiO2 three-component junction system exhibited an anatase/rutile (weight ratio of 73.8:26.2) mixed phase structure, narrower band gap (2.25 eV), and extremely small particle sizes (ca. 12 nm) with metallic Ag particles well distributed on the surface of the composite. The Ag/V-TiO2 nanocomposite was used as the visible- and UV-light-driven photocatalyst to degrade dyes rhodamine B (RB) and coomassie brilliant blue G-250 (CBB) in an aqueous Solution. At 1.8% Ag and 4.9% V doping, the Ag/V-TiO2 system exhibited the highest visible- as well as UV-light photocatalytic activity: additionally, the activity of the three-component system exceeded that of Degussa P25, pure TiO2, single-doped TiO2 system (Ag/TiO2 or V-TiO2) as well as P123-free-Ag/V-TiO2 codoped system. The reasons for this enhanced photocatalytic activity were revealed.

• 出版日期2010-3-15
• 单位东北师范大学