Template-Free Hydrothermal Synthesis of β-FeOOH Nanorods and Their Catalytic Activity in the Degradation of Methyl Orange by a Photo-Fenton-Like ProcessReportar como inadecuado




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The rod-shaped form of crystalline β-FeOOH akaganeite was prepared by thetemplate-free hydrothermal method with urea as the homogeneous precipitant.X-ray diffraction, field-emission scanning electron microscope and Fourier transforminfrared spectrum were used to characterize the resulting products. Thedegradation of methyl orange MO was studied using the prepared nanostructurematerials in a photo-Fenton-like process. MO degradation was effectively achievedby hydroxyl radicals that were generated in the heterogeneous catalysisprocess. Specific surface area of the prepared β-FeOOH was an important factoraffecting the efficiency of MO degradation, which depended on the synthesisconditions such as the reaction temperature, the initial concentration of ureaand FeCl3.6H2O as well as the nurea-nFe3+ratio. The photodegradation efficiencies slightly decreased with the increaseof initial pH in the range of 4.5 - 9.5, which indicated the prepared β-FeOOH catalyst can well overcome thedrawback of a narrow pH range of homogeneous Fenton reaction. β-FeOOH catalysts loading and H2O2 concentration also play important effect on the degradation efficiency of MO.The prepared β-FeOOH showed good ability of reuse for multiple trials.

KEYWORDS

β-FeOOH; Heterogeneous; Photocatalysis; Fenton Reaction; Template-Free Hydrothermal Synthesis

Cite this paper

Z. Xu, J. Liang and L. Zhou -Template-Free Hydrothermal Synthesis of β-FeOOH Nanorods and Their Catalytic Activity in the Degradation of Methyl Orange by a Photo-Fenton-Like Process,- Open Journal of Inorganic Non-metallic Materials, Vol. 3 No. 4, 2013, pp. 58-65. doi: 10.4236-ojinm.2013.34010.





Autor: Zhihui Xu, Jianru Liang, Lixiang Zhou

Fuente: http://www.scirp.org/



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