PHOTODISCOLORATION OF REACTIVE BLACK 5 DYE USING MECHANOCHEMICALLY ACTIVATED TIO2-CEO2 PHOTOCATALYSTS
Katya Milenova, Katerina Zaharieva, Zara Cherkezova-Zheleva, Boris Kunev, Alexander Eliyas, Vlado Blaskov, Irina Stambolova, Ivan Mitov
Pages: 241-249
Published: 2 Jun 2014
Views: 3,848
Downloads: 1,386
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Abstract: The mechanochemical activation was used as a preparation method for obtaining nanosized mixed oxide TiO₂–CeO₂ photocatalysts. Commercial TiO₂ and CeO₂ oxides (Alfa Aesar GmbH & Co. KG) were mixed at mass ratio: 1:1; 1:2 and 2:1 and then treated mechanochemically. The prepared nanostructured TiO₂–CeO₂ materials were physicochemically characterized with techniques such as X-ray diffraction analysis and Fourier transform infrared spectroscopy. The photodiscoloration tests of Reactive Black 5 dye solutions under UV light irradiation established that equal contents of TiO₂ and CeO₂ in mechanochemically activated TiO₂–CeO₂ mixtures lead to best photocatalytic activity of prepared catalyst samples (highest rate constant). TiO₂–CeO₂ (1:1) (2.5 × 10⁻³ min⁻¹) > TiO₂–CeO₂ (1:2) (2.6 × 10⁻³ min⁻¹) > TiO₂–CeO₂ (2:1) (2.8 × 10⁻³ min⁻¹).
Keywords: photocatalysts, mechanochemical treatment, photocatalytic degradation, reactive black 5 dye
Cite this article: Katya Milenova, Katerina Zaharieva, Zara Cherkezova-Zheleva, Boris Kunev, Alexander Eliyas, Vlado Blaskov, Irina Stambolova, Ivan Mitov. PHOTODISCOLORATION OF REACTIVE BLACK 5 DYE USING MECHANOCHEMICALLY ACTIVATED TIO2-CEO2 PHOTOCATALYSTS. Journal of International Scientific Publications: Materials, Methods & Technologies 8, 241-249 (2014). https://www.scientific-publications.net/en/article/1000168/
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