Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5350537 | Applied Surface Science | 2017 | 6 Pages |
Abstract
In this work, using economical and stable niobium oxide (Nb2O5) powder as niobium source, visible light responsive Nb-doped titanate nanostructures were synthesized by hydrothermal process. The synthesized Nb-doped titanate nanostructures were composed of two types of titanate nanostructures (nanotubes and nanosheets) and TiO2 nanoparticles. They have a smaller band gap energy of 3.24Â eV compared to pure TNTs that were synthesized under the same experimental conditions. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was evaluated under visible light irradiation through the degradation of methylene blue (MB) and rhodamine B (RhB). Consequently, the synthesized Nb-doped titanate nanostructures exhibited much higher photocatalytic activity under visible light irradiation than pure TNTs. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was 1.4 times (MB) and 3.1 times (RhB) higher than of pure TNTs because the Nb-doping narrowed the band gap and it accelerated the separation of photo-induced electron-hole pairs.
Related Topics
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Authors
Jong Min Byun, Hye Rim Choi, Young Do Kim, Tohru Sekino, Se Hoon Kim,