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Enhanced photocatalytic activity of (Mo, C)-codoped anatase TiO2 nanoparticles for degradation of methyl orange under simulated solar irradiation

Published online by Cambridge University Press:  31 January 2011

Pengyu Dong
Affiliation:
Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
Bin Liu*
Affiliation:
Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
Yuhua Wang*
Affiliation:
Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
Huanhuan Pei
Affiliation:
Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
Shu Yin
Affiliation:
IMRAM, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
*
a)Address all correspondence to these authors. e-mail: liubin@lzu.edu.cn
b)Address all correspondence to these authors. e-mail: wyh@lzu.edu.cn
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Abstract

C-doped, Mo-doped, and (Mo, C)-codoped TiO2 photocatalysts were prepared by a sol-gel process. The photocatalytic activity was evaluated by the photocatalytic degradation of methyl orange (MO) under simulated solar irradiation. Results indicated that both monodoped and codoped TiO2 exhibited better visible light absorption behavior and narrower energy gap than pure TiO2, and codoped TiO2 showed a slightly higher adsorption property in the dark because of higher Brunauer–Emmett–Teller-specific surface area. The photocatalytic activity of monodoped TiO2 was also enhanced, and the (0.04% Mo, C)-codoped sample had the best photocatalytic activity for degrading MO among all of the samples. The reason can be ascribed to the synergistic effect due to Mo and C doping. Furthermore, the transfer pathways of photoinduced carriers and photocatalytic reaction mechanism of (Mo, C)-codoped TiO2 was first investigated.

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Articles
Copyright
Copyright © Materials Research Society 2010

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References

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