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Enhanced visible photocatalytic activity of nitrogen doped single-crystal-like TiO2 by synergistic treatment with urea and mixed nitrates

Published online by Cambridge University Press:  08 December 2016

Chenxi Li ,
Zengying Zhao ,
Hamukwaya Shindume Lomboleni ,
Hongwei Huang  and
Zhijian Peng
Chenxi Li
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, People’s Republic of China
Zengying Zhao*
Affiliation:
School of Science, China University of Geosciences, Beijing 100083, People’s Republic of China
Hamukwaya Shindume Lomboleni
Affiliation:
School of Science, China University of Geosciences, Beijing 100083, People’s Republic of China
Hongwei Huang
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, People’s Republic of China
Zhijian Peng
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: 1012278135@qq.com
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Abstract

N-doped single-crystal-like TiO2 is claimed to be a very promising material among various catalytic. In this paper, N-doped single-crystal-like TiO2 (N-S-TiO2) samples were firstly prepared by molten salt method with urea and mixed nitrates as synergistic doping agents, therein, the mixed nitrates works also as a morphology modifier to form a single-crystal-like structure in the sample. The nitrogen content in the N-S-TiO2 sample could be improved because of the adding of NaNO3 and KNO3 mixed nitrates compared with using urea as a single nitrogen source. UV–Vis absorption spectroscopy analysis indicated that the nitrogen doped TiO2 has a red shift of the light absorption edge. The presence of N–O bonds on the surface of the N-S-TiO2 samples could be confirmed by x-ray photoelectron spectroscopy. The degradation efficiency of N-S-TiO2 to methylene blue under visible light is the best compared with different TiO2 samples without the treatment of mixed nitrates.

Keywords

mixed nitratesmolten salt methodN-doped single-crystal-like TiO2catalyticvisible light
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 4 , 28 February 2017 , pp. 737 - 747
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Copyright
Copyright © Materials Research Society 2016 

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Footnotes

Contributing Editor: Xiaobo Chen

References

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