期刊
JOURNAL OF RAMAN SPECTROSCOPY
卷 44, 期 11, 页码 1609-1614出版社
WILEY-BLACKWELL
DOI: 10.1002/jrs.4376
关键词
Al-substituted goethite; goethite; micro-Raman spectroscopy; linear relationship; in situ
类别
资金
- Natural Science Foundation of China [41130206, 41072036]
- PhD Programs Foundation of Ministry of Education of China [20110111110003]
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology
The characterization of X-ray diffraction, X-ray fluorescence, and field emission scanning electron microscope were used to confirm the successful preparation of Al-substituted goethite with different Al content. The micro-Raman spectroscopy was utilized to investigate the effect of Al content on the goethite lattice. The results show that all the feature bands of goethite shifted to high wavenumbers after the occurrence of Al substitution for Fe in the structure of goethite. The shift of wavenumber shows a good linear relationship as a function of increasing Al content especially for the band at 299cm(-1) (R-2=0.9992). The in situ Raman spectroscopy of thermally treated goethite indicated that the Al substitution not only hinders the transformation of goethite, but also retarded the crystallization of thermally formed hematite. All the results indicated that Raman spectrum displayed an excellent performance in characterizing Al-substituted goethite, which implied the promising application in other substituted metal oxides or hydroxides. Copyright (c) 2013 John Wiley & Sons, Ltd.
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