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Bensaha, Rabah
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Publications (2/2 displayed)
- 2019Synthesis and photocatalytic efficiency of sol-gel Al<SUP>3+</SUP>-doped TiO<SUB>2</SUB> thin films: correlation between the structural, morphological and optical propertiescitations
- 2006Variation of the structural and optical properties of sol-gel TiO <SUB>2</SUB> thin films with different treatment temperaturescitations
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article
Synthesis and photocatalytic efficiency of sol-gel Al<SUP>3+</SUP>-doped TiO<SUB>2</SUB> thin films: correlation between the structural, morphological and optical properties
Abstract
Porous Al<SUP>3+</SUP>-doped TiO<SUB>2</SUB> thin films, synthesized by a simple sol─gel dip-coating method onto glass substrates and annealed at 500 °C for 2 h, were studied. X-ray diffraction and Raman analyses showed that these films crystallize in pure anatase phase. As far as Al<SUP>3+</SUP> doping augments, the nanocrystallinity enhances and the grain size increases from 15.07 to 24.59 nm. According to atomic force microscopy images, 3 at% is the Al<SUP>3+</SUP> doping content that promotes the highest porous surface formation. The UV─vis and photoluminescence measurements indicate that Al<SUP>3+</SUP> doping decreases the band gap from 3.51 to 3.25 eV and reduces the electrons─hole recombination rate, respectively. The photocatalytic activity of porous 3 at% Al:TiO<SUB>2</SUB> film has been tested for the degradation of two different organic pollutants under UV light irradiation. In fact, total degradation of both rhodamine B (RhB) dye and phenol in water was obtained. Also, the photocatalyst displays a good photostability....