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Structure and high photocatalytic activity of (N, Ta)-doped TiO2 nanoparticles

Le, N. T.H. ; Thanh, T. D. ; Pham, Van-Thai LU ; Phan, T. L. ; Lam, V. D. ; Manh, D. H. ; Anh, T. X. ; Le, T. K.C. LU ; Thammajak, N. and Hong, L. V. , et al. (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.

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publishing date
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}},
}