The rod-shaped form of crystallineβ-FeOOH (akaganeite) was prepared by the
template-free hydrothermal method with urea as the homogeneous precipitant.
X-ray diffraction, field-emission scanning electron microscope and Fourier transform
infrared spectrum were used to characterize the resulting products. The
degradation of methyl orange (MO) was studied using the prepared nanostructure
materials in a photo-Fenton-like process. MO degradation was effectively achieved
by hydroxyl radicals that were generated in the heterogeneous catalysis
process. Specific surface area of the preparedβ-FeOOH was an important factor
affecting the efficiency of MO degradation, which depended on the synthesis
conditions such as the reaction temperature, the initial concentration of urea
and FeCl3.6H2O as well as the n(urea)/n(Fe3+)
ratio. The photodegradation efficiencies slightly decreased with the increase
of initial pH in the range of 4.5-9.5, which indicated the prepared β-FeOOH catalyst can well overcome the
drawback of a narrow pH range of homogeneous Fenton reaction. β-FeOOH catalysts loading and H2O
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