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Fig. 10 XPS spectra of Cr 2p in the Cr,La-STO-1.0 photocatalyst before
(a), and after (b) the photocatalytic reaction; and Cr 2p in the Cr-doped
STO photocatalyst before (c), and after (d) the photocatalytic reaction.
Conclusion
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In summary, Cr,La-codoped SrTiO
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3
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significantly affected after the introduction of Cr and La into the
SrTiO crystal structure. The Cr,La-codoped SrTiO nanoparticles
3
3
exhibited an enhanced photocatalytic activity for the degradation of
RhB under sunlight irradiation. The photocatalytic results revealed
that the charge state of Cr plays an important role in the improved
photocatalytic activity of Cr,La-codoped SrTiO
enhanced photocatalytic performance of Cr,La-codoped SrTiO
nanoparticles under sunlight irradiation is due to synergistic effects
including a high visible light response, a significant decrease in
crystal size, and a high surface area. In addition, the trapping
experiments confirmed that photogenerated OH and h are the
major reactive species responsible for the photodegradation of RhB
1
1
1
2
2
2
2
2
2
3
nanoparticles. The
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ꢁ
+
1 H. Yu, S. Yan, Z. Li, T. Yu and Z. Zou, Int. J. Hydrogen Energy,
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in the Cr,La-codoped SrTiO system. Therefore, the present work
2
012, 37, 12120–12127.
2 M. J. P. Park, K. Burk and M. Ernzerhof, Phys. Rev. Lett.,
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demonstrates that the codoping strategy can be useful in the design
and development of advanced photocatalytic materials for environ-
mental remediation.
1
3 Y. Jia, S. Shen, D. Wang, X. Wang, J. Shi, F. Zhang, H. Han
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Acknowledgements
2004, 163, 181–186.
Authors thank the Department of Science and Technology,
Government of India for financial support (SR/FT/CS-096/2009).
Surendar Tonda also thanks the Ministry of Human Resource
Development, Government of India, for providing a fellowship.
5 S. X. Ouyang, H. Tong, N. Umezawa, J. Cao, P. Li,
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