Fe 3 O 4 @C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

• Published in: Nanomaterials (Basel, Switzerland) Switzerland), 2021-01, Vol.11 (2)
• Main Authors: Xiang, Hengli, Ren, Genkuan, Zhong, Yanjun, Xu, Dehua, Zhang, Zhiye, Wang, Xinlong, Yang, Xiushan
• Format: Article
• Language: English
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano11020330

Fe O @C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO , FeS , and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.52 mg/g, and that the adsorption process was exothermic. Additionally, by employing H O as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe O @C nanoparticles, while that of MB was only ~34% using pure Fe O nanoparticles. The mechanism of H O activated on the Fe O @C nanoparticles and the possible degradation pathways of MB are discussed. The Fe O @C nanoparticles retained high catalytic activity after five usage cycles. This work describes a facile method for producing Fe O @C nanoparticles with excellent catalytic reactivity, and therefore, represents a promising approach for the industrial production of Fe O @C nanoparticles for the treatment of high concentrations of dyes in wastewater.