Rapid removal of methyl orange by a UV Fenton-like reaction using magnetically recyclable Fe-oxalate complex prepared with rice husk

Heo, Jun Neoung; Yeon, Jeong; Son, Namgyu; Kim, Junyeong; Kim, Yang Soo; Hwang, Hae Jin; Kang, Misook

doi:10.1016/j.jiec.2018.10.038

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…It can be seen from Figure 9 b that the magnet can separate β-FeOOH/Fe 3 O 4 /biochar in a very short time, which also shows that β-FeOOH/Fe 3 O 4 /biochar is very magnetic. It can also be seen from the previous VSM data that the composite is superparamagnetic [ 33 , 41 ].…”

Section: Resultsmentioning

confidence: 85%

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Zhang

Wang

et al. 2021

Nanomaterials

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A novel nano-β-FeOOH/Fe3O4/biochar composite with enhanced photocatalytic performance and superparamagnetism was successfully fabricated via an environmentally friendly one-step method. The structural properties of the prepared composite were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and a vibrating sample magnetometer. The XPS spectrum of the as-prepared composites confirmed the presence of Fe-O-C bonds between β-FeOOH and biochar, which could be conducive to transfer photo-generated electrons. UV-vis spectroscopy confirmed the existence of an electron–hole connection between β-FeOOH and biochar, which promoted the rapid interface transfer of photogenerated electrons from β-FeOOH to biochar. These novel structures could enhance the response of biochar to accelerate the photoelectrons under visible light for more free radicals. Electron spin resonance analysis and free radical quenching experiments showed that •OH was the primary active species in the photodegradation process of methyl orange by nano-β-FeOOH/Fe3O4/biochar. In the synergistic photocatalytic system, β-FeOOH/Fe3O4/biochar exhibited excellent catalytic activity for the degradation of azo dye (methyl orange), which is 2.03 times higher than that of the original biochar, while the surface area decreased from 1424.82 to 790.66 m2·g−1. Furthermore, β-FeOOH/Fe3O4/biochar maintained a stable structure and at least 98% catalytic activity after reuse, and it was easy to separate due to its superparamagnetism. This work highlights the enhanced photocatalytic performance of β-FeOOH/Fe3O4/biochar material, which can be used in azo dye wastewater treatment.

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Section: Resultsmentioning

confidence: 85%

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Zhang

Wang

et al. 2021

Nanomaterials

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“…Dispersing the active phase on a support as a heterogeneous system is a possibility to enhance the efficiency and the separated ability [4,5] due to avoiding the agglomeration, the poison of the active site during the reaction. Among supports such as carbon [3], zeolite [6], diatomite [7], or fly ash [8], amorphous silica from rice husk, a popular agricultural byproduct in Vietnam [8,9], is an excellent carrier with high surface area, nanoparticle size, and high stability in acid media [8,10,11]. Moreover, in a heterogeneous process, the degradation of pollutants in water can occur over a wide pH range [12].…”

Section: Introductionmentioning

confidence: 99%

Application of the Fenton-like agent based on magnetic iron and manganese oxide in the degradation process of paracetamol in water

Nguyen Manh,

Long Ha Phuong,

Dat Tran Phuc

et al. 2023

Mong. J. Chem.

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A Fenton-like catalyst MnO2-Fe3O4/SiO2 is synthesized via a two-step approach. The prepared composite has a mesoporous structure and a high surface area of 190 m2/g. The XRD pattern describes a specific peak of Fe3O4 magnetite on the baseline of amorphous silica. Furthermore, the FTIR spectra not only show the height assigned to stretching vibrations of Si-O-Si bonds, and Fe–O–Fe connections but also exhibit a small peak that matches the Mn–O bonds. SEM images exhibit a porous network structure of the composites with some holes among 30 – 100 nm clusters. The activity of the catalyst is determined in a paracetamol degradation as a Fenton oxidation. The paracetamol removal efficiency is at 85.6% with the optimal condition as initial pH 3, catalyst dosage of 0.15 g/50mL and H2O2 concentration of 1 mL/50 mL. In addition, the catalyst can be reused at least 5 times with a low reduction of the catalytic activity from 85.6% to 80.8%. The experiment results open a direction that has high efficiency in the treatment process of excess paracetamol in pharmacy wastewater.

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Characterization of amino-crosslinked hypromellose and its adsorption characteristics for methyl orange from water

Huang

et al. 2020

J Mater Sci

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Rapid removal of methyl orange by a UV Fenton-like reaction using magnetically recyclable Fe-oxalate complex prepared with rice husk

Cited by 11 publications

References 32 publications

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Application of the Fenton-like agent based on magnetic iron and manganese oxide in the degradation process of paracetamol in water

Characterization of amino-crosslinked hypromellose and its adsorption characteristics for methyl orange from water

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