Journal
APPLIED SURFACE SCIENCE
Volume 395, Issue -, Pages 110-116Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.07.034
Keywords
Cu+2 doped TiO2 thin films; Anatase TiO2; Optical properties; Structural properties; Photocatalytic activity
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Funding
- Chinese Academy of Science (CAS) through CAS President's International Fellowship Initiative [2015 VTA016]
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Pure and Cu+2 doped TiO2 thin films have been successfully deposited onto glass substrate by sol-gel dip-coating. The films were annealed at 450 degrees C for 1 h and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), atomic force microscopy (AFM), UV-vis spectrophotometer and photocatalytic degradation of methylene blue. XRD confirmed the presence of two phases at higher Cu concentration; TiO2 anatase and CuO. AFM analysis showed that the surface roughness increases within increasing Cu content as well as the presence of large aggregates at higher Cu content. SEM observations confirmed the granular structure of the films, and EDX analysis revealed a low solubility limit (effective doping) of Cu into TiO2 lattice. It was found that the optical band gap energy decreases with increasing Cu content. At constant irradiation time, the photo-degradation of methylene blue rate decreased with increasing concentration of Cu+2. (C) 2016 Elsevier B.V. All rights reserved.
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