Recyclable Fe3O4/Au Nanocomopsites for Oxidation Degradation of Methylene Blue in Near Neutral Solution

Yan Xing; Xiao-Hui Bai; Ming-Li Peng; Xiang-Rong Ma; Norbert Buske; Ya-Li Cui

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자료유형: 학술저널

저자정보: Yan Xing (Yulin University) Xiao-Hui Bai (Yulin University) Ming-Li Peng (Northwest University) Xiang-Rong Ma (Yulin University) Norbert Buske (National Engineering Research Center for Miniaturized Detection Systems) Ya-Li Cui (Northwest University)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.10

발행연도: 2019.1

수록면: 1 - 9 (9page)

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Fe3O4/Au nanocomopsites (Fe3O4/Au NPs) with much improved catalytic activity were successfully fabricated through a simple seed growth method in aqueous solution. The petal-like structure, high saturation magnetization, the negatively charged sodium citrate-stabilized Fe3O4/Au NPs was characterized by transmission electron microscopy (TEM), X-ray diffractometer (XRD), dynamic light scattering (DLS) and vibrating sample magnetometry (VSM). The activated-H2O2 ability of Fe3O4/Au NPs was evaluated by using methylene blue (MB) as a cationic phenothiazines dye to be degraded in near neutral solution. The results showed Fe3O4/Au NPs removed over 95% MB from an aqueous solution within 60 min under the optimum conditions. The apparent rate constant of Fe3O4/Au NPs was 10.8 x 10 -2 min -1 which was 43.2 and 8.3 times higher than pure Fe3O4 (2.5 x 10 -3 min -1) and Au (1.3 x 10 -2 min -1) NPs. The enhanced catalytic activity and increased oxidation rate constant probably owing to the synergistic effect between Fe3O4 and Au NPs to activate H2O2 generate a large amount of strong oxidizing species, such as ·OH. In addition, nanocrystalline structure of Fe3O4/Au NPs was also very important to the peroxidase-like effect, especially the interaction interface between Fe3O4 and Au NPs. Moreover, Fe3O4/Au NPs was stable and could be regenerated and reused for at least five cycles.

#Fe3O4/Au nanocomopsites #catalytic oxidation #methylene blue #synergistic effect

참고문헌 (36)

참고문헌 신청

Sinan Du / 2017 / Polydopamine-Coated Fe3O4 Nanoparticles as Synergistic Redox Mediators for Catalytic Reduction of Azo Dyes / NANO 12(3):93~101

Z. F. Cao / 2018 / Colloids Surf. A 549:94

Q. Wu / 2016 / J. Taiwan. Inst. Chem. E 67:484

I. A. W. Tan / 2008 / J. Hazard. Mater 154:337

I. A. W. Tan / 2008 / Desalination 225:13

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