Self-Assembled/Oval-Shaped Iron Oxide Nanoparticles for Efficient Photo-Fenton Reaction at Neutral pH
- Authors
- Lee, Young-Chul; Lee, Hyun Uk; Oh, Seo Yeong; Jang, Sung-Chan; Lee, Soon Chang; Huh, Yun Suk
- Issue Date
- Oct-2017
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Iron Oxide; Self-Assembly; Phase Transformation; Photo-Fenton; Pilot Scale
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.17, no.10, pp.7651 - 7655
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 17
- Number
- 10
- Start Page
- 7651
- End Page
- 7655
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5626
- DOI
- 10.1166/jnn.2017.14776
- ISSN
- 1533-4880
- Abstract
- Mass-production simple synthesis of self-assembled oval-shaped iron oxide nanparticles was achieved by 24 h solvothermal treatment at 100 degrees C using a ferric nitrate precursor in ethanol media. The Brunauer-Emmett-Teller (BET) surface area was measured to similar to 100 m(2)/g, and the XRD pattern results showed a hematite crystalline structure. With increasing heat-treatment temperature from 300 to 700 degrees C under a 4% H-2/96% Ar atmosphere for 3 h operation, the oval-shaped morphology of the iron oxide nanoparticles (NPs) was disrupted, leading to a sharp decrease in BET surface area with mixed hematite, magnetite, and wustite phases. Taking into consideration H2O2 as a decomposition catalyst of iron oxide NPs, photo-Fenton degradation of methylene blue (MB) was investigated. The results showed the highest apparent rate constant of 5.36x10(-3) min(-1) (r(2) = 0.996) under the 0.2 g alpha-Fe2O3 powder dosage and 0.5 M H2O2 loading conditions; however, all of the phase-transformed alpha-Fe2O3 NPs showed smaller apparent rate constants. Notably, 50 L pilot-scale photo-Fenton reaction based on the optimal batch-scale MB-degradation conditions could be of significant potential catalytic utility in advanced oxidation processes (AOPs) for practical water/wastewater applications.
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