title: Photoelectrocatalytic degradation of benzoic acid using Au doped TiO2 thin films.
abstract: Highly transparent pure and Au doped TiO2 thin films are successfully deposited by using simple chemical spray pyrolysis technique. The effect of Au doping onto the structural and physicochemical properties has been investigated. The PEC study shows that, both short circuit current (Isc) and open circuit voltage (Voc) are (Isc=1.81mA and Voc=890mV) relatively higher at 3at.% Au doping percentage. XRD study shows that the films are nanocrystalline in nature with tetragonal crystal structure. FESEM images show that the film surface covered with a smooth, uniform, compact and rice shaped nanoparticles. The Au doped thin films exhibit indirect band gap, decreases from 3.23 to 3.09eV with increase in Au doping. The chemical composition and valence states of pure and Au doped TiO2 films are studied by using X-ray photoelectron spectroscopy. The photocatalytic degradation effect is 49% higher in case 3at.% Au doped TiO2 than the pure TiO2 thin film photoelectrodes in the degradation of benzoic acid. It is revealed that Au doped TiO2 can be reused for five cycles of experiments without a requirement of post-treatment while the degradation efficiency was retained.
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: V S
authors.initials: VS
authors.lastname: Mohite
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: M A
authors.initials: MA
authors.lastname: Mahadik
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: S S
authors.initials: SS
authors.lastname: Kumbhar
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: Y M
authors.initials: YM
authors.lastname: Hunge
authors.affiliation: Department of Materials Science and Engineering, Chonnam National University, 300 Yong bong-Dong, Puk-Gu, Gwangju 500-757, South Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: A V
authors.initials: AV
authors.lastname: Moholkar
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India.
authors.forename: K Y
authors.initials: KY
authors.lastname: Rajpure
authors.affiliation: Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India. Electronic address: chbhosale@gmail.com.
authors.forename: C H
authors.initials: CH
authors.lastname: Bhosale
mesh_terms: D019817:Benzoic Acid / Q000737:chemistry*; D002384:Catalysis; D004553:Electric Conductivity; D006046:Gold / Q000737:chemistry*; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D010782:Photolysis / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: C009495:titanium dioxide; D006046:Gold; D019817:Benzoic Acid; D014025:Titanium