期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 199, 期 -, 页码 280-286出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.12.020
关键词
N-doped TiO2; Solid-state reaction; Titanate nanotubes; Inorganic ammonium salt; Visible light photocatalysis
资金
- National Natural Science Foundation of China [21001093]
- Zhejiang Provincial Natural Science Foundation of China [Y4090285, Y4110418]
- Science Foundation of Zhejiang Sci-Tech University [0913840-Y]
- Qianjiang talent project of Zhejiang Province of China [2011R10048]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
A facile and convenient method has been developed to prepare N-doped TiO2 visible light nanocatalysts, which is performed by a solid-state calcination of one-dimensional titanate nanotubes with an inorganic ammonium salt (NH4Cl). The ion-exchange reaction between layered nanotubes and NH4Cl contributes to the phase transition to crystalline TiO2 combined with N doping. X-ray diffraction and transmission electron microscopy are carried out to study the phase evolution, compositions, and morphologies of obtained samples. X-ray photoelectron spectroscopy reveals that the N dopant in TiO2 is assigned to the interstitial NHx species. Both the phase transition and N doping are further confirmed by UV-vis diffuse reflectance spectra. All N-doped TiO2 materials exhibit significantly higher visible light activities than that of the parent nanotubes for degrading rhodamine B. In addition, the N-doped TiO2 nanocatalyst holds a strong stability and durability for the removal of organic pollutions. (C) 2012 Elsevier Inc. All rights reserved.
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