Effect of the Sintering Temperature on the Photocatalytic Activity of CdO + CdTiO3 Thin Films
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Sandra Andrea Mayén-Hernández
Abstract
CdO + CdTiO3 thin films were prepared on glass substrates by means of the sol-gel technique. Two Ti/Cd ratios, 0.54 and 0.67, in the precursor solutions were studied. After the dipping process, the samples were sintered in an open atmosphere during one hour at selected temperatures (Ts) in the range of 350-600 °C. The variation of Ts was in steps of 50 °C. X-ray diffraction, UV-Vis optical absorption, and atomic force spectroscopy techniques were employed for characterization. The photocatalytic activity (PA) was measured by means of the photobleaching of an aqueous solution of methylene blue (MB) after irradiation with an UV lamp. The MB concentration was determined by using optical absorption spectra, measured before and after the photobleaching process, and the Lambert-Beer principle. The best PA was obtained for films sintered at 500 °C for both Ti/Cd ratios studied, as for this Ts value the PA was very similar.
© 2016 by Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Preface (TiO2-11 Section)
- Preface (AOTs-12 Section)
- Photocatalytic Decomposition of Formaldehyde Using Titania Coated Lime Tile
- TiO2-Nitrogen Modified for Water Decolourisation under VIS Radiation
- FTIR Studies of the Surface of TiO2, Fe-TiO2 and Fe-C-TiO2 Photocatalysts in Phenol Oxidation Via the Photo-Fenton Process
- Using Titania Photocatalysts to Degrade Toluene in a Combined Adsorption and Photocatalysis Process
- Photoelectrochemical Decomposition of VOCs on an Anodized TiO2 Plate
- Enhancement and Modeling of the Photocatalytic Degradation of Benzoic Acid
- Reactivity Indices for ortho/para Monosubstituted Phenols
- Modeling of the Photocatalytic Degradation Reactions of Aromatic Pollutants: A Solvent Effect Model
- Photodegradation of Malachite Green Using Immobilized TiO2 and Factorial Design
- Adsorption and Photodegradation of Humic Acids by Nano-Structured TiO2 for Water Treatment
- Photocatalytic Reductive Destruction of Azo Dyes by Polyoxometalates
- Effect of the Sintering Temperature on the Photocatalytic Activity of CdO + CdTiO3 Thin Films
- Photocatalytic Activity in Zn2TiO4 + ZnO Thin Films Obtained by the Sol-gel Process
- TiO2-Based Materials for Toluene Photocalytic Oxidation: Water Vapor Influence
- Influence of Aqueous Solubility of Various VOCs on Their Photocatalytic Degradation
- Photocatalysis: A Powerful Technology for Cold Storage Applications
- Some Remarks on So-Called Heterogeneous Photocatalysis and on the Mechanical Application of the Langmuir-Hinshelwood Kinetic Model
