A novel CoFe layered double hydroxides adsorbent: High adsorption amount for methyl orange dye and fast removal of Cr(VI)

Ling, Faling; Fang, Liang; Lu, Yi‐Chun; Gao, Jiemei; Wu, Fang; Zhou, Miao; Hu, Baoshan

doi:10.1016/j.micromeso.2016.07.015

Cited by 126 publications

(36 citation statements)

References 40 publications

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“…Methyl orange (MO), which is widely used in dyeing industries, is known to be highly toxic, carcinogenic and mutagenic 3,4 . Therefore, it is imperative to get rid of this dye from a waste stream before it is discharged into aqueous bodies.…”

Section: Introductionmentioning

confidence: 99%

Removal of methyl orange from aqueous solution using synthetic clay type MgAl-LDH: Characterization, Isotherm and thermodynamic studies

et al. 2019

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The MgAl-LDH adsorbent (2:1) was developed by the urea method and used as an adsorbent for the removal of methyl orange from aqueous solution.Â The synthesized adsorbent was characterized by a different analytical technique: scanning electron microscope SEM, X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). The effect of adsorption parameters such as solution pH, initial concentration of dye, and the temperature was studied using a static system. X-ray diffraction analysis of the samples confirms the crystal structure of the MgAl-LDH material. The MgAl-LDH adsorbent was efficient in removing MO from aqueous solution, and maximum removal of 98.5 % was observed in the pH range from 2 to 10. The maximum adsorption capacity of MgAl-LDH (2:1) was calculated from the Langmuir isotherm; the maximum quantity is 1250 mg. g-1. The determination of the thermodynamic parameters indicates that the reaction between methyl orange and MgAl-LDH (2:1) is spontaneous and exothermic (Î”HÂ°<0 and Î”GÂ°<0).It can be concluded that LDH adsorbent can be used effectively for the removal of anionic dyes fromÂ industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

Removal of methyl orange from aqueous solution using synthetic clay type MgAl-LDH: Characterization, Isotherm and thermodynamic studies

et al. 2019

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“…The interplanar spacing (Figure b) of 0.209 and 0.241 nm of the formed nanoparticles were consistent with the (2 0 0) and (1 1 1) plane of NiO, respectively. After electrodeposition, clear LDH nanosheets were decorated on the Ni/NiO surface and the SAED image in the white circle (Figure c) indicated the (0 1 2) and (1 1 0) planes of CoFe LDH with a hydrotalcite structure (see layered structures of CoFe LDH in Figure S4). As indicated in Figure c and Figure S5, many of the NiO NPs were decorated on the CoFe LDH during the electrodeposition process, which would be beneficial for the HER performance.…”

Section: Resultsmentioning

confidence: 99%

“…For Ni/NiO foam, diffraction peaks at 37.2°, 43.3°, and 62.9° were clearly identified, corresponding to the (1 1 1), (2 0 0), and (2 2 0) plane of fcc NiO, respectively. After electrodeposition, additional peaks were observed at approximately 23.5°, 34.0°, and 59.7°, which were indexed to the (0 0 6), (0 1 2), and (1 1 0) reflections of typical CoFe LDH, indicating good crystallinity …”

Section: Resultsmentioning

confidence: 99%

“…The SEM images of the bare Ni foam, Ni/NiO foam, and NCF450a re shown in Figure 1. The SEM images of the Ni foam with as mooth surfacea td ifferent magnifications are shown in Figure 1a,b.A fter laser ablation, it is cleart hat the surface of the Ni foam was significantly modified with al arge number of micro-and nanostructures (Figure 1c (110) planes of CoFe LDH with ah ydrotalcite structure [42] (see layered structures of CoFe LDH in Figure S4). As indicated in Fig The X-ray photoelectrons pectroscopy( XPS) spectra of the Ni 2p peaks of Ni and NiO are shown in Figure 3b.O nly Ni 2 + 2p peaks of NiO were observed in the NiO sample after laser treatment on Ni, which was consistent with prior reports.…”

Section: Resultsmentioning

confidence: 99%

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Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting

Yin

et al. 2019

ChemSusChem

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The development of simple and effective methods for the rapid preparation of electrocatalysts for overall water splitting from earth‐abundant elements is an important and challenging task. A facile and ultrafast two‐step method was developed to prepare a Ni/NiO@CoFe layered double hydroxide hierarchical nanostructure (NCF) within a few minutes by femtosecond laser ablation and electrodeposition. In 1 m KOH solution, the optimized NCF catalysts show a low overpotential of 230 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm−2 with a low Tafel slope of 34.3 mV dec−1, indicating fast and efficient OER kinetics. Owing to the synergistic effect between NiO and CoFe layered double hydroxide, the hydrogen evolution reaction performance of the NCF was also improved. The synthesized electrocatalysts were further utilized in overall water splitting with a potential of only 1.56 V at a current density of 10 mA cm−2 and excellent durability, better than that of the commercial RuO2(+)//Pt/C(−) system. The present work provides new insights on the rapid and facile preparation of efficient electrocatalysts for overall water splitting on a large scale.

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“…Among the dyes in wastewater, methyl orange is a very harmful contaminant for human and aquatic animals. [2] Therefore, different methods such as physical adsorption, chemical decomposition, and microbiological decomposition are developed for the elimination of dyes and heavy metals in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Methyl Orange Adsorption by Fe2O3@Co-Al-Layered Double Hydroxide

Jamshidi

Manteghi

2020

The 23rd International Electronic Conference on Synthetic Organic Chemistry

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A magnetic composite consisting of iron oxide and a cobalt-aluminum-layered double hydroxide, Fe2O3@Co-Al-layered double hydroxide was prepared through linking of Fe2O3 to Co-Al layered double hydroxide (LDH) by sodium acetate. Layered double hydroxides are generally described as [M 2+ 1-xM 3+ x(OH)2] [An-x/n·mH2O], where M 2+ and M 3+ are divalent and trivalent metal cations, respectively, and A is an n-valent interlayer guest anion. The composite was characterized by XRD, FTIR and UV-Vis. spectroscopy methods. Afterwards, the composite was used for methylorange adsorption in aqueous solution. The UV-Vis spectrum indicates that the adsorption process was satisfying. In effect, after several washings of the composite, no decrease of the adsorption capacity was observed.

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A novel CoFe layered double hydroxides adsorbent: High adsorption amount for methyl orange dye and fast removal of Cr(VI)

Cited by 126 publications

References 40 publications

Removal of methyl orange from aqueous solution using synthetic clay type MgAl-LDH: Characterization, Isotherm and thermodynamic studies

Removal of methyl orange from aqueous solution using synthetic clay type MgAl-LDH: Characterization, Isotherm and thermodynamic studies

Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting

Methyl Orange Adsorption by Fe2O3@Co-Al-Layered Double Hydroxide

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