Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 18, Issue 4, Pages 2637-2642Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2018.15191
Keywords
alpha-Fe2O3; Nanorods; Fenton Oxidation; Morphology Control
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Funding
- Natural Science Foundation of China [21444006]
- public welfare research fund of China Liaoning provincial Science and Technology Department [2015003015]
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Different morphologies hematite (alpha-Fe2O3) nanocrystals were synthesized by hydrothermal process and subsequent calcination treatment. The crystal structure and shape of the products were confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Fenton oxidation degradation of Congo red (CR) was carried out with alpha-Fe2O3 nanocrystals with different morphologies to compare their catalytic performance. The result shows that CR can be degraded above 90% after 2 h by using alpha-Fe2O3 nanorods. In addition, degradation efficiencies of alpha-Fe2O3 nanocrystals with different morphologies towards CR were also investigated. It reveals that alpha-Fe2O3 nanorods with exposed {210} and {001} planes exhibited superior Fenton oxidation performance to that of nanoparticles. It is traceable to the higher density of Fe3+ exposed on the {210} and {001} planes of nanorods than that of other morphologies crystals. The mechanism of Fenton oxidation and kinetics analysis were extensively studied.
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