Abstract
In this work, using economical and stable niobium oxide (Nb 2 O 5 ) 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 TiO 2 nanoparticles. They have a smaller band gap energy of 3.24 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.
| Original language | English |
|---|---|
| Pages (from-to) | 126-131 |
| Number of pages | 6 |
| Journal | Applied Surface Science |
| Volume | 415 |
| DOIs | |
| State | Published - 1 Sep 2017 |
Keywords
- Doping
- Hydrothermal process
- Niobium
- Photocatalytic activity
- Titanate nanostructures