Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 27, Pages 14534-14540Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp304324e
Keywords
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Funding
- Ministry of Science and Innovation of the Spanish Government [CSD2008-00023, CTQ2009-07469]
- Catalan Government (Departament de Medi Ambient i Habitatge) [SGR-0333]
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Nitrogen-doped TiO2 vertically aligned columnar arrays were grown by reactive pulsed laser deposition using self-assembled polystyrene (PS) microsphere monolayers as templates and TiO2 hemispherical arrays as buffers. The created columnar arrays showed significantly enhanced photocatalytic activity as compared with the reference thin films grown under identical experimental conditions but in the absence of the PS templates, both under visible- as well as UV-light irradiation. The photocatalytic activity decreased with the increase in the nitrogen doping level, suggesting the existence of a threshold value for the nitrogen incorporation in the TiO2 crystal lattice.
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