Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 163, Issue -, Pages 459-466Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.08.035
Keywords
Fe3O4; Ionic liquid; Iron(III)-porphyrin; 2,4,6-Tribromophenol; Humic acid
Funding
- Japan Society for Promotion of Science [25241017]
- Grants-in-Aid for Scientific Research [25241017] Funding Source: KAKEN
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Iron(III)-tetrakis(p-sulfonatephenyl)porphyrin (FeTPPS), immobilized on ionic liquid (IL) functionalized Fe3O4, was used as a powerful catalyst for degrading TrBP. The prepared Fe3O4@SiO2-IL-FeTPPS catalyst was characterized by SEM, TEM, TEM-EDX, XRD and FT-IR. The percent degradation of TrBP was calculated based on the initial and remained concentrations of TrBP, as determined by high performance liquid chromatography. The amount of Br- released via the debromination was also determined by ion chromatography. The Fe3O4@SiO2-IL-FeTPPS showed a high catalytic activity and 200 mu M of TrBP was efficiently degraded at pH 6 using 500 mu M KHSO5, even in the presence of 86 mg L-1 humic acid, which is known as a major concomitant in waste waters. In addition, the degraded TrBP had undergone more than 50% mineralization, while 30% of mineralization was found for Fe3O4 alone as a control. The Fe3O4@SiO2-IL-FeTPPS catalyst had a high catalytic activity for the degradation of TrBP, and the IL modified surface played a key role in restoring the homogeneous catalytic efficiency of the supported FeTPPS. (C) 2014 Elsevier B.V. All rights reserved.
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