Effect of deposition of Ag on TiO2 nanoparticles on the photodegradation of Reactive Yellow-17.
Nanoparticles of TiO(2) were synthesized by sol-gel technique and the photodeposition of about 1% Ag on TiO(2) particles was carried out. Ag-deposited TiO(2) catalyst was characterised by XRD, TEM and UV-vis spectroscopy. The Ag-TiO(2) catalyst was evaluated for their photocatalytic activity towards the degradation of Reactive Yellow-17 (RY-17) under UV and visible light irradiations. Then the results were compared with synthesized nano-TiO(2) sol and P-25 Degussa and the enhanced degradation was obtained with Ag-deposited TiO(2). This enhanced activity of Ag-TiO(2) may be attributed to the trapping of conduction band electrons. The effect of initial dye concentration, pH and electron acceptors such as H(2)O(2), K(2)S(2)O(8) on the photocatalytic activity were studied and the results obtained were fitted with Langmuir-Hinshelwood model to study the degradation kinetics and discussed in detail.
Rupa
A Valentine
AV
Department of Chemical Engineering, A.C. College of Technology, Anna University, Chennai 600025, Tamilnadu, India.
Manikandan
D
D
Divakar
D
D
Sivakumar
T
T
D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010782:Photolysis; D017319:Photosensitizing Agents / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D011720:Pyrazoles / Q000737:chemistry* / Q000528:radiation effects; D012834:Silver / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
D001391:Azo Compounds; D017319:Photosensitizing Agents; D017680:Potassium Compounds; D011720:Pyrazoles; D013431:Sulfates; C524439:reactive yellow-17; C009495:titanium dioxide; D012834:Silver; C009007:potassium persulfate; D006861:Hydrogen Peroxide; D014025:Titanium