Cooperation between N and Fe in co-doped TiO2 photocatalyst

Cooperation between N and Fe in co-doped TiO2 photocatalyst TiO2 photocatalysts co-doped with N and Fe were synthesized by the sol–gel method. Cooperation of N and Fe in the co-doped TiO2 was studied by monitoring NH3 decomposition, X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–Vis) absorption spectroscopy, and simulation based on density functional theory (DFT). The results from NH3 decomposition revealed that cooperation of N and Fe broadened the range of response of TiO2 to visible light and also enhanced the photocatalytic activity of TiO2 under ultraviolet light. The XRD patterns and SEM and HRTEM images indicated that the co-doped samples prepared were nanometric anatase with an average particle size of 20 nm. Co-doping with N and Fe inhibited grain growth of TiO2 and resulted in larger lattice distortion. XPS analysis showed that the doped N and Fe atoms were replacing lattice oxygen and Ti atoms, respectively. UV–Vis absorption spectra of the co-doped sample showed that the optical absorption edge had been shifted to approximately 675 nm. The DFT results confirmed that cooperation of the Fe3d and N2p orbits reduced the energy gap of TiO2 and thus broadened its range of response to visible light. The synergistic action of the electron density around N and Fe in the co-doped TiO2 enhanced its photochemical stability. In addition, a photocatalytic reaction mechanism for TiO2 co-doped with N and Fe revealed the presence of N2p, Fe3d, and Ti3d orbits as photogenerated hole–electron traps, which enhanced the photocatalytic quantum efficiency. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Cooperation between N and Fe in co-doped TiO2 photocatalyst

Loading next page...
 
/lp/springer_journal/cooperation-between-n-and-fe-in-co-doped-tio2-photocatalyst-MEC1dUP8tX
Publisher
Springer Netherlands
Copyright
Copyright © 2015 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-015-2050-1
Publisher site
See Article on Publisher Site

Abstract

TiO2 photocatalysts co-doped with N and Fe were synthesized by the sol–gel method. Cooperation of N and Fe in the co-doped TiO2 was studied by monitoring NH3 decomposition, X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–Vis) absorption spectroscopy, and simulation based on density functional theory (DFT). The results from NH3 decomposition revealed that cooperation of N and Fe broadened the range of response of TiO2 to visible light and also enhanced the photocatalytic activity of TiO2 under ultraviolet light. The XRD patterns and SEM and HRTEM images indicated that the co-doped samples prepared were nanometric anatase with an average particle size of 20 nm. Co-doping with N and Fe inhibited grain growth of TiO2 and resulted in larger lattice distortion. XPS analysis showed that the doped N and Fe atoms were replacing lattice oxygen and Ti atoms, respectively. UV–Vis absorption spectra of the co-doped sample showed that the optical absorption edge had been shifted to approximately 675 nm. The DFT results confirmed that cooperation of the Fe3d and N2p orbits reduced the energy gap of TiO2 and thus broadened its range of response to visible light. The synergistic action of the electron density around N and Fe in the co-doped TiO2 enhanced its photochemical stability. In addition, a photocatalytic reaction mechanism for TiO2 co-doped with N and Fe revealed the presence of N2p, Fe3d, and Ti3d orbits as photogenerated hole–electron traps, which enhanced the photocatalytic quantum efficiency.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 25, 2015

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off