Heterojunction of CuO nanoclusters with TiO2 for photo-oxidation of organic compounds and for hydrogen production
Heterojunctions of small CuO nanoclusters (synthesized by radiolysis) with TiO2 (commercial P25) induced a photocatalytic activity under visible light irradiation in a wide range of wavelengths due to the narrow bandgap of CuO nanoclusters of around 1.7 eV. The optical, chemical, and electrical prop...
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| Veröffentlicht in: | The Journal of chemical physics 2020-07, Vol.153 (3), p.034705-034705 |
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| container_title | The Journal of chemical physics |
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| creator | Méndez-Medrano, Maria Guadalupe Kowalska, Ewa Ohtani, Bunsho Bahena Uribe, Daniel Colbeau-Justin, Christophe Rau, Sven Rodríguez-López, José Luis Remita, Hynd |
| description | Heterojunctions of small CuO nanoclusters (synthesized by radiolysis) with TiO2 (commercial P25) induced a photocatalytic activity under visible light irradiation in a wide range of wavelengths due to the narrow bandgap of CuO nanoclusters of around 1.7 eV. The optical, chemical, and electrical properties of these composite nanomaterials were studied. The photocatalytic properties of bare and modified TiO2–P25 were studied for water purification (photooxidation of organic compounds such as phenol and 2-propanol) and for hydrogen generation under visible light irradiation. Time resolved microwave conductivity signals showed activation of TiO2 under visible light, proving the injection of electrons from CuO nanoclusters to the conduction band of TiO2–P25. The modified materials showed high photocatalytic activity under visible light. The important role of charge-carriers was demonstrated for both photoreduction and photooxidation reactions. |
| doi_str_mv | 10.1063/5.0015277 |
| format | Article |
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The optical, chemical, and electrical properties of these composite nanomaterials were studied. The photocatalytic properties of bare and modified TiO2–P25 were studied for water purification (photooxidation of organic compounds such as phenol and 2-propanol) and for hydrogen generation under visible light irradiation. Time resolved microwave conductivity signals showed activation of TiO2 under visible light, proving the injection of electrons from CuO nanoclusters to the conduction band of TiO2–P25. The modified materials showed high photocatalytic activity under visible light. 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| subjects | Catalytic activity Chemical Sciences Conduction bands Current carriers Electrical properties Electrical resistivity Heterojunctions Hydrogen production Light irradiation Nanoclusters Nanomaterials Optical properties Organic compounds Oxidation Photocatalysis Photochemical reactions Photooxidation Radiolysis Titanium dioxide Water purification |
| title | Heterojunction of CuO nanoclusters with TiO2 for photo-oxidation of organic compounds and for hydrogen production |
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