Fabrication of Nano Iron Oxide–Modified Biochar from Co-Hydrothermal Carbonization of Microalgae and Fe(II) Salt for Efficient Removal of Rhodamine B

Peng, Ziling; Fan, Zeyu; Chen, Xia; Gao, Zhuo Fan; Deng, Shanshan; Wan, Sha; Lv, Xingdong; Shi, Yan; Han, Wei

doi:10.3390/nano12132271

Cited by 27 publications

(3 citation statements)

References 53 publications

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“…4d shows that the peaks at 713.7 eV and 727.04 eV correspond to Fe 2p 1/2 and Fe 2p 3/2 , respectively. 55 Compared with FeSO 4 ·7H 2 O, the binding energy of Fe@Co-MOF-3 is highly shifted to lower energy levels, which further indicates that the electronic structure of Fe in the material is greatly changed during the post-treatment process. 56,57 The transfer of the binding energy of metal elements is also strong evidence for the electron transfer and subsequent synergistic coupling effect between Fe and Co, which will be beneficial to the improvement of the OER performance of the material.…”

Section: Resultsmentioning

confidence: 96%

Iron-doped novel Co-based metal–organic frameworks for preparation of bifunctional catalysts with an amorphous structure for OER/HER in alkaline solution

et al. 2022

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Section: Resultsmentioning

confidence: 96%

Iron-doped novel Co-based metal–organic frameworks for preparation of bifunctional catalysts with an amorphous structure for OER/HER in alkaline solution

et al. 2022

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“…The SEM image of the activated carbon (Figure 3B) shows a spongelike structure with enhanced porosity as a result of the chemical activation process. The SEM image of the ferromagnetic activated carbon (Figure 3C) shows a surface covered with dispersed particles of iron oxides that clog the pores (Aurelien et al, 2022;Peng et al, 2022).…”

Section: Edx and Sem Of Ac-ps And Ac-ps@feiimentioning

confidence: 99%

Synthesis and characterization of peanut shell-derived ferromagnetic activated carbon: application in the Fenton process for the degradation of methyl orange

Ndongmo,

Mabou,

Tchuifon Tchuifon

et al. 2024

Front. Environ. Chem.

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The objective of the current work was to synthesize and characterize ferromagnetic activated carbon from peanut shells (PSs) and apply it for the degradation of methyl orange (MO) following the heterogeneous Fenton process. PSs were activated with phosphoric acid and potassium hydroxide at 1:1, 1:2, and 1:3 solid/liquid activation ratios and different concentrations (0.5, 1, and 1.5 M) and pyrolized at 500°C. Based on the iodine indexes, KOH-activated carbon adsorbents exhibited higher porosity than the H3PO4-activated adsorbents. KOH-activated carbon at a 1:3 activation ratio (iodine value 591 mg/g) was selected for magnetization using iron (II) ions and catalytic mineralization of MO dye. The ferromagnetic activated carbon (AC-PS@FeII) was characterized using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) analysis, and nitrogen-adsorption BET measurements. AC-PS@FeII contained ferromagnetite with a cubic spinel structure and a specific area of 181.96 m2·g–1. AC-PS@FeII degraded MO with a degradation efficiency of 99.22% at pH 2, 4 g/L of catalyst dosage, and a 50-min contact time. The results of recyclability tests, using distilled water, revealed a slight decrease in degradation capacity after four runs, indicating that the developed catalyst was appreciably stable. The hetero-Fenton catalyst from peanut shells could be an ideal catalyst for treating wastewater contaminated with dyes as a path toward a circular economy.

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“…The surface mapping of the ferromagnetic biochar (Figure 3B1) shows a surface filled with iron oxide that covers the porous carbonaceous and oxygenated surface of the biochar. In addition, the presence of cavity-shaped pores on the surface of the biochar is favorable to the adsorption of iron particles during synthesis [34,35]. modified the amorphous structure of the BNM to obtain the ferromagnetic biochar BNMF of crystalline structure.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Ferromagnetic Biochar Prepared from Hydrothermally Modified Calcined Mango Seeds for Fenton-like Degradation of Indigo Carmine

Bopda

Mafo

Ndongmo

et al. 2022

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Biochar and ferromagnetic biochar obtained from the pyrolysis of dried mango seeds and modified using a hydrothermal method were used as catalyst for the heterogeneous degradation of indigo carmine in an aqueous medium. These prepared biochars were characterized using different techniques: Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The analyses of the results revealed the presence of iron oxide in the form of magnetite (Fe3O4) in the catalyst. The catalytic tests carried out with this composite material showed a significant degradation of indigo carmine. The maximum degradation of indigo carmine in the aqueous solution was reached after 240 min of agitation. The Fenton degradation process using irradiation with a 100 W electric lamp and hydrogen peroxide (concentration 4 mol/L) showed the best results at pH = 3. From this study, it emerged that the second-order kinetic model better described the degradation process, and it gave lower half-lives compared to those obtained with the first-order kinetic law. The study also showed that ferromagnetic biochar could be prepared from mango seeds and used for the degradation of indigo carmine in an aqueous solution.

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Fabrication of Nano Iron Oxide–Modified Biochar from Co-Hydrothermal Carbonization of Microalgae and Fe(II) Salt for Efficient Removal of Rhodamine B

Cited by 27 publications

References 53 publications

Iron-doped novel Co-based metal–organic frameworks for preparation of bifunctional catalysts with an amorphous structure for OER/HER in alkaline solution

Iron-doped novel Co-based metal–organic frameworks for preparation of bifunctional catalysts with an amorphous structure for OER/HER in alkaline solution

Synthesis and characterization of peanut shell-derived ferromagnetic activated carbon: application in the Fenton process for the degradation of methyl orange

Ferromagnetic Biochar Prepared from Hydrothermally Modified Calcined Mango Seeds for Fenton-like Degradation of Indigo Carmine

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