期刊
JOURNAL OF CLUSTER SCIENCE
卷 24, 期 1, 页码 97-106出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10876-012-0522-7
关键词
alpha-FeOOH; alpha-Fe2O3; Hydrothermal synthesis; Thermal treatment; Nanocrystalline materials; Photocatalytic activity
资金
- National Natural Science Foundation of China [51102160]
- Fundamental Research Funds for the Central Universities [GK201102027]
- Japan Society for the Promotion of Science (JSPS)
- Grants-in-Aid for Scientific Research [11F01066] Funding Source: KAKEN
Hollow alpha-FeOOH urchin-like spheres were synthesized by a simple hydrothermal method at 160 A degrees C for 12 h and their thermal conversion to hollow alpha-Fe2O3 urchin-like spheres was performed at 300 A degrees C for 2 h in air. The results from X-ray diffraction and electron microscopy analyses reveal that hollow alpha-FeOOH urchin-like spheres were completely transformed to hollow alpha-Fe2O3 urchin-like spheres without a significant morphological change. Also, the effect of hydrothermal treatment temperature (170-200 A degrees C for 12 h) on the phase structure and morphology of the final product was investigated. Pure alpha-FeOOH, the mixture of alpha-FeOOH and alpha-Fe2O3, and pure alpha-Fe2O3 with different morphologies were obtained at < 180, 180-190 and 200 A degrees C, respectively. The obtained materials can be used in the photodegradation of organic pollutants under visible light irradiation.
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