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Molten-salt fabrication of (N,F)-codoped single-crystal-like titania with high exposure of (001) crystal facet for highly efficient degradation of methylene blue under visible light irradiation

Published online by Cambridge University Press:  25 May 2018

Zengying Zhao ,
Mingchao Feng ,
Zhijian Peng ,
Hongwei Huang ,
Zhanhu Guo  and
Zhaohui Li
Zengying Zhao*
Affiliation:
School of Science, China University of Geosciences, Beijing 100083, China
Mingchao Feng
Affiliation:
School of Science, China University of Geosciences, Beijing 100083, China
Zhijian Peng
Affiliation:
School of Science, China University of Geosciences, Beijing 100083, China
Hongwei Huang*
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
Zhanhu Guo*
Affiliation:
Chemical and Biomolecular Engineering Department, University of Tennessee, Knoxville, Tennessee 37996, USA
Zhaohui Li
Affiliation:
Geosciences Department, University of Wisconsin – Parkside, Kenosha, Wisconsin 53144, USA
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
c)e-mail: [email protected]
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Abstract

Single-crystal-like TiO2 is claimed to be a very promising material among various catalysts. In this study, the (N,F)-co-doped single-crystal-like TiO2 was prepared by a new molten mixing process in which the mixed nitrates were used both as a morphology modifier and an N-doping agent at the same time. The prepared samples also had well-developed (001) facet due to the addition of HF. The HF can also be an F doping agent to the material. The co-doping of N and F can diminish the band gap of TiO2 from 3.05 to 2.93 eV, therefore visible light can be used effectively by the material. In addition, NO and fluorine ions existing on the surface of the sample can also help its photocatalyticity. Therefore, the photocatalytic performance of the as-prepared sample was effectively improved.

Keywords

dopantoptical propertiescatalytic
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 10 , 28 May 2018 , pp. 1411 - 1421
Copyright
Copyright © Materials Research Society 2018 

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