Structure and high photocatalytic activity of (N, Ta)-doped TiO2 nanoparticles
(2016) In Journal of Applied Physics 120(14).- Abstract
A hydrothermal method was used to prepare three nano-crystalline samples of TiO2 (S1), N-doped TiO2 (S2), and (N, Ta)-codoped TiO2 (S3) with average crystallite sizes (D) of 13-25 nm. X-ray diffraction studies confirmed a single phase of the samples with a tetragonal/anatase structure. A slight increase in the lattice parameters was observed when N and/or Ta dopants were doped into the TiO2 host lattice. Detailed analyses of extended X-ray absorption spectra indicated that N- and/or Ta-doping into TiO2 nanoparticles influenced the co-ordination number and radial distance (R) of Ti ions in the anatase structure. Concerning their absorption spectra, (N, Ta)-doping narrowed the band... (More)
A hydrothermal method was used to prepare three nano-crystalline samples of TiO2 (S1), N-doped TiO2 (S2), and (N, Ta)-codoped TiO2 (S3) with average crystallite sizes (D) of 13-25 nm. X-ray diffraction studies confirmed a single phase of the samples with a tetragonal/anatase structure. A slight increase in the lattice parameters was observed when N and/or Ta dopants were doped into the TiO2 host lattice. Detailed analyses of extended X-ray absorption spectra indicated that N- and/or Ta-doping into TiO2 nanoparticles influenced the co-ordination number and radial distance (R) of Ti ions in the anatase structure. Concerning their absorption spectra, (N, Ta)-doping narrowed the band gap (Eg) of TiO2 from 3.03 eV for S1 through 2.94 eV for S2 to 2.85 eV for S3. Such results revealed the applicability of these nanoparticles in the photocatalytic field working in the ultraviolet (UV)-visible region. Among these, photocatalytic activity of S3 was the strongest. By using S3 as a catalyst powder, the degradation efficiency of methylene blue solution was about 99% and 93% after irradiation of UV-visible light for 75 min and visible-light for 180 min, respectively.
(Less)
- author
- publishing date
- 2016-10-14
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Applied Physics
- volume
- 120
- issue
- 14
- article number
- 142110
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- scopus:84985025962
- ISSN
- 0021-8979
- DOI
- 10.1063/1.4961718
- language
- English
- LU publication?
- no
- id
- 13be6596-0ad5-4974-8042-5d28558e3cad
- date added to LUP
- 2019-06-30 09:30:34
- date last changed
- 2022-04-10 19:28:02
@article{13be6596-0ad5-4974-8042-5d28558e3cad, abstract = {{<p>A hydrothermal method was used to prepare three nano-crystalline samples of TiO<sub>2</sub> (S1), N-doped TiO<sub>2</sub> (S2), and (N, Ta)-codoped TiO<sub>2</sub> (S3) with average crystallite sizes (D) of 13-25 nm. X-ray diffraction studies confirmed a single phase of the samples with a tetragonal/anatase structure. A slight increase in the lattice parameters was observed when N and/or Ta dopants were doped into the TiO<sub>2</sub> host lattice. Detailed analyses of extended X-ray absorption spectra indicated that N- and/or Ta-doping into TiO<sub>2</sub> nanoparticles influenced the co-ordination number and radial distance (R) of Ti ions in the anatase structure. Concerning their absorption spectra, (N, Ta)-doping narrowed the band gap (E<sub>g</sub>) of TiO<sub>2</sub> from 3.03 eV for S1 through 2.94 eV for S2 to 2.85 eV for S3. Such results revealed the applicability of these nanoparticles in the photocatalytic field working in the ultraviolet (UV)-visible region. Among these, photocatalytic activity of S3 was the strongest. By using S3 as a catalyst powder, the degradation efficiency of methylene blue solution was about 99% and 93% after irradiation of UV-visible light for 75 min and visible-light for 180 min, respectively.</p>}}, author = {{Le, N. T.H. and Thanh, T. D. and Pham, Van-Thai and Phan, T. L. and Lam, V. D. and Manh, D. H. and Anh, T. X. and Le, T. K.C. and Thammajak, N. and Hong, L. V. and Yu, S. C.}}, issn = {{0021-8979}}, language = {{eng}}, month = {{10}}, number = {{14}}, publisher = {{American Institute of Physics (AIP)}}, series = {{Journal of Applied Physics}}, title = {{Structure and high photocatalytic activity of (N, Ta)-doped TiO<sub>2</sub> nanoparticles}}, url = {{http://dx.doi.org/10.1063/1.4961718}}, doi = {{10.1063/1.4961718}}, volume = {{120}}, year = {{2016}}, }