Core/Shell ZnO/TiO<sub>2</sub>, SiO<sub>2</sub>/TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO<sub>2</sub> Nanoparticles for the Photodecomposition of Brilliant Blue E-4BA

Core/Shell ZnO/TiO<sub>2</sub>, SiO<sub>2</sub>/TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO<sub>2</sub> Nanoparticles for the Photodecomposition of Brilliant Blue E-4BA

The synthesis and characterization of ZnO/TiO<sub>2</sub>, SiO<sub>2</sub>/TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO&l...

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Bibliographic Details
Main Authors: Mahboubeh Dolatyari, Mehdi Tahmasebi, Sudabeh Dolatyari, Ali Rostami, Armin Zarghami, Ashish Yadav, Axel Klein
Format: Article
Language:English
Published: MDPI AG 2024-10-01
Series:Inorganics
Subjects:
photocatalyst
nanomaterials
heterojunction
dye degradation
DFT calculations
Online Access:https://www.mdpi.com/2304-6740/12/11/281
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Summary:The synthesis and characterization of ZnO/TiO<sub>2</sub>, SiO<sub>2</sub>/TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO<sub>2</sub> core/shell nanoparticles (NPs) is reported. The NPs were used for photocatalytic degradation of brilliant blue E-4BA under UV and visible light irradiation, monitored by high-performance liquid chromatography and UV-vis absorption spectroscopy. The size of the NPs ranged from 10 to 30 nm for the core and an additional 3 nm for the TiO<sub>2</sub> shell. Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> and Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO<sub>2</sub> showed superior degradation under UV and visible light compared to ZnO/TiO<sub>2</sub> and SiO<sub>2</sub>/TiO<sub>2</sub> with complete photodecomposition of 20 ppm dye in 20 min using a 10 mg/100 mL photocatalyst. The “Co-doped” Al<sub>1.9</sub>Co<sub>0.1</sub>O<sub>3</sub>/TiO<sub>2</sub> NPs show the best performance under visible light irradiation, which is due to increased absorption in the visible range. DFT-calculated band structure calculations confirm the generation of additional electronic levels in the band gap of γ-Al<sub>2</sub>O<sub>3</sub> through Co<sup>3+</sup> ions. This indicates that Co-doping enhances the generation of electron–hole pairs after visible light irradiation.
ISSN:2304-6740

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