In situ preparation of magnetic Fe3 O4 .Cu2 O.Fe3 O4 /cryogel nanocomposite powder via a reduction-coprecipitation method as adsorbent for methylene blue water pollutant

2018 ◽  
Vol 67 (7) ◽  
pp. 925-935 ◽  
Author(s):  
Ayman M Atta ◽  
Hamad A Al-Lohedan ◽  
Ahmed M Tawfeek ◽  
Mona A Ahmed
Keyword(s):  
Methylene Blue ◽  
Coprecipitation Method ◽  
Blue Water ◽  
Nanocomposite Powder ◽  
In Situ Preparation ◽  
Water Pollutant

Controllable in-situ preparation of high-coverage horizontal TiO2 nanosheet array

2021 ◽  
Vol 765 ◽  
pp. 138284
Author(s):  
Junqi Wang ◽  
Xiaoping Zou ◽  
Jialin Zhu ◽  
Jin Cheng ◽  
Xiao Bai ◽  
...  
Keyword(s):  
High Coverage ◽  
Nanosheet Array ◽  
In Situ Preparation

scholarly journals Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 330
Author(s):  
Hengli Xiang ◽  
Genkuan Ren ◽  
Yanjun Zhong ◽  
Dehua Xu ◽  
Zhiye Zhang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Solid Phase ◽  
Raw Materials ◽  
Phase Method ◽  
Maximum Adsorption Capacity ◽  
High Catalytic Activity ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
High Concentrations

Fe3O4@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO4, FeS2, 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 H2O2 as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe3O4@C nanoparticles, while that of MB was only ~34% using pure Fe3O4 nanoparticles. The mechanism of H2O2 activated on the Fe3O4@C nanoparticles and the possible degradation pathways of MB are discussed. The Fe3O4@C nanoparticles retained high catalytic activity after five usage cycles. This work describes a facile method for producing Fe3O4@C nanoparticles with excellent catalytic reactivity, and therefore, represents a promising approach for the industrial production of Fe3O4@C nanoparticles for the treatment of high concentrations of dyes in wastewater.

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