Sono-assisted preparation of highly-efficient peroxidase-like Fe(3)O(4) magnetic nanoparticles for catalytic removal of organic pollutants with H(2)O(2)

Ultrasonics Sonochemistry
Nan WangHeqing Tang

Abstract

Fe(3)O(4) magnetic nanoparticles (Fe(3)O(4) MNPs) with much improved peroxidase-like activity were successfully prepared through an advanced reverse co-precipitation method under the assistance of ultrasound irradiation. The characterizations with XRD, BET and SEM indicated that the ultrasound irradiation in the preparation induced the production of Fe(3)O(4) MNPs possessing smaller particle sizes (16.5nm), greater BET surface area (82.5m(2)g(-1)) and much higher dispersibility in water. The particle sizes, BET surface area, chemical composition and then catalytic property of the Fe(3)O(4) MNPs could be tailored by adjusting the initial concentration of ammonia water and the molar ratio of Fe(2+)/Fe(3+) during the preparation process. The H(2)O(2)-activating ability of Fe(3)O(4) MNPs was evaluated by using Rhodamine B (RhB) as a model compound of organic pollutants to be degraded. At pH 5.4 and temperature 40 degrees C, the sonochemically synthesized Fe(3)O(4) MNPs were observed to be able to activate H(2)O(2) and remove ca. 90% of RhB (0.02mmolL(-1)) in 60min with a apparent rate constant of 0.034min(-1) for the RhB degradation, being 12.6 folds of that (0.0027min(-1)) over the Fe(3)O(4) MNPs prepared via a conventional revers...Continue Reading

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Citations

Feb 11, 2014·Environmental Science and Pollution Research International·Feifei HaoLiangguo Yan
Apr 25, 2012·Environmental Science and Pollution Research International·Jun-Xia YuJia Guo
Oct 1, 2014·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Qing Chang, Heqing Tang
Aug 16, 2015·Biochemical and Biophysical Research Communications·E TombáczL Vékás
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Jun 13, 2016·Analytical and Bioanalytical Chemistry·Huiliang WangWeiyue Feng
Aug 16, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Qing ChangHeqing Tang
Oct 4, 2016·The Science of the Total Environment·Nicolaza ParionaRicardo Clark-Tapia
Mar 28, 2017·Journal of the American Chemical Society·Zijie ZhangJuewen Liu
Apr 23, 2017·Artificial Cells, Nanomedicine, and Biotechnology·Jafar GolchinAbolfazl Akbarzadeh
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