Mixed phase titania nanocomposite codoped with metallic silver and vanadium oxide: new efficient photocatalyst for dye degradation.
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-TiO(2) 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-TiO(2) 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-TiO(2) 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 TiO(2), single-doped TiO(2) system (Ag/TiO(2) or V-TiO(2)) as well as P123-free-Ag/V-TiO(2) codoped system. The reasons for this enhanced photocatalytic activity were revealed.
Yang
Xia
X
School of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, PR China.
Ma
Fengyan
F
Li
Kexin
K
Guo
Yingna
Y
Hu
Jianglei
J
Li
Wei
W
Huo
Mingxin
M
Guo
Yihang
Y
D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D007220:Industrial Waste; D008670:Metals / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D044367:Phase Transition; D012235:Rhodamines / Q000737:chemistry; D012394:Rosaniline Dyes / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014639:Vanadium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D007220:Industrial Waste; D008670:Metals; D010087:Oxides; D012235:Rhodamines; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical; D014639:Vanadium; D012834:Silver; D014025:Titanium; C029773:rhodamine B; C004692:coomassie Brilliant Blue