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Start Over Author "Eder, Dominik" Journal applied catalysis b: environmental
3 results on '"Eder, Dominik"'

3. Oxygen vacancies and interfaces enhancing photocatalytic hydrogen production in mesoporous CNT/TiO2 hybrids

Author

Paul Gebhardt, Alexey Cherevan, Silvia Marchesan, Maurizio Prato, Juan J. Vilatela, Alicia Moya, Dominik Eder, Moya, Alicia, Cherevan, Alexey, Marchesan, Silvia, Gebhardt, Paul, Prato, Maurizio, Eder, Dominik, and Vilatela, Juan J.

Subjects
Materials science, Oxide, Nanotechnology, carbon nanotubes, TiO2, photocatalysis, hybrids, sol-gel, electrospinning, nanomaterials, Catalysis, Nanomaterials, photocatalysi, chemistry.chemical_compound, carbon nanotube, General Environmental Science, Hydrogen production, hybrid, Process Chemistry and Technology, Electrospinning, Chemical engineering, chemistry, Nanocrystal, Photocatalysis, Water splitting, Mesoporous material
Abstract

We demonstrate a unique route towards hierarchical assemblies of mesoporous TiO2 and CNT/TiO2 photocatalysts by a combination of electrospinning and sol–gel methods. The resulting materials exhibit a mesoporous network of highly crystalline, well-connected inorganic nanocrystals with an order of magnitude higher photocatalytic activity than individualised TiO2 nanoparticles. The in-situ combination of small amounts of MWCNTs with TiO2 to form an electrospun CNT/TiO2 hybrid further enhanced the oxide photoactivity considerably, reaching hydrogen evolution rates of 1218 μmol/h in water splitting in the presence of sacrificial reagents under UV irradiation. We also discuss the effect of oxygen vacancies on the oxide crystallisation and phase transformation. These vacancies lead to inter-bandgap states and a lower flat band potential that facilitates the photocatalytic process.

Published
2015

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