Synthesis and characterisation of LDH‐type anionic nanomaterials for the effective removal of doxycycline from aqueous media

Moaty, S.A. Abdel; Mahmoud, Rehab; Gaber, Yasser; Farghali, Ahmed A.; Wahed, Mahmoud S. M. Abdel; Younes, Heba A.

doi:10.1111/wej.12526

Cited by 27 publications

(9 citation statements)

References 62 publications

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“…As a consequence of the surface charge of the starting layered host matrix, as well as the resulting chemical composition of the hybrid materials, a change in the values of zeta potential (ZHN-CA and ZHA-CA) was obtained. Based on the results of the zeta potential values, the interfacial behavior indicates suspension stability based on electrostatic interactions of the hybrid materials and the starting host matrices, which have differences owing to the chemical composition and interactions [2,25,29,30].…”

Section: Interfacial Characterizationmentioning

confidence: 99%

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

2020

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Caffeic acid (CA) molecules were immobilized in a layered inorganic host matrix based on zinc hydroxide structures with different starting interlayer anions, nitrate, and acetate. The chemical composition, structure, thermal stability, morphology, and surface of the host matrices and hybrid compounds were analyzed by X-ray diffraction (XRD), themogravimetric/differencial thermal analysis (TG/DTA), Fourier transform infrarred spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Additionally, the surface charge of the materials was investigated using zeta potential at pH ~7. The results show an influence of the surface charge on the chemical, interaction, and structure of the resulting hybrid materials as a function of the starting layered structures. An expansion of the basal spacing to 10.20 Å for zinc hydroxide nitrate (ZHN), and a shrinkage to 10.37 Å for zinc hydroxide acetate (ZHA). These results suggest that the CA lies with a tilt angle in the interlayer region of the inorganic host matrix. The immobilization of CA is favored in ZHN, with respect to ZHA, because a single-layered phase was identified. A higher thermal stability at 65 °C was observed for ZHN-CA than for ZHA-CA. The evaluation of the release behavior showed a higher percentage of CA released from ZHN than ZHA, and the release mechanism was described by the Elovich model. The hybrid materials show potential characteristics for use as bioactive delivery systems.

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Section: Interfacial Characterizationmentioning

confidence: 99%

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

2020

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“…(Abdel Moaty et al. 2019), Fe‐Mg LDH has a higher surface area than Al‐Mg LDH. However, the average pore diameter of Al‐Mg LDH is higher than Fe‐Mg LDH.…”

Section: Resultsmentioning

confidence: 99%

“…2015), and for water remediation from industrial pollution (Zubair et al. 2017, Extremera 2012), and for removing antibiotics from aqueous media (Abdel Moaty et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of calcined Aluminum‐Magnesium layered double hydroxide for adsorption of aflatoxin M₁ from solution and matrix of milk

Jahanmard

Keramat

Nasirpour

et al. 2021

Journal of Food Science

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Detoxification of aflatoxin M1 from solution and milk using layered double hydroxides was investigated. The Aluminum‐Magnesium layered double hydroxide (Al‐Mg LDH) and Iron‐Magnesium layered double hydroxide (Fe‐Mg LDH) were selected in their calcined and non‐calcined forms to evaluate the effect of the calcination on detoxification. These materials were produced using the co‐precipitation method. Preliminary adsorption tests confirmed use of Al‐Mg LDH as the selected adsorbent. Characteristics of the adopted adsorbent were studied and confirmed by XRD, FTIR, SEM, and BET methods. Effects of the initial content of aflatoxin, amount of the adsorbents and detoxification time were investigated. Influence of the adsorbents on the nutritional aspects of milk were also studied. The study showed that while the non‐calcined forms of LDH were not able to adsorb aflatoxin M1 more than 23%, the calcined form of Al‐Mg LDH exhibited 100% adsorption in the solutions and about 70–100% in the contaminated milk samples. The reason is pointed to the fact that calcination of Al‐Mg LDH considerably increased the surface area, the total pore volume, and the pore size of the material. Multivariate regression analysis and calculation of the Pearson correlation factor showed that the remained aflatoxin at each time was more strongly correlated with the initial amount of aflatoxin and the elapsed time and less strongly with the amount of the adsorbent. It was found that the adsorption isotherms fitted to the Freundlich equation with a high adsorption capacity of 555.5 mg g−1. Practical Application This study is focused on examining ability of layered double hydroxides (LDH) for adsorbing AFM1. LDHs are promising layered materials due to some of their interesting characteristics, such as ease of synthesis and uniqueness of structure. In practice, results of this study can be used for detoxification of aflatoxin, especially in milk, at high efficiency in shorter time durations.

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“…On the other hand, the band at 1629 cm −1 is due to the bending vibration of the interlayer H 2 O water molecules 28 , 29 . The band at 1378 cm −1 was attributed to the ν 3 stretching vibration of the nitrate groups in the interlayer of LDH 30 . This band intensity decreased with calcination temperature elevation due to the decomposition of nitrates into NO and/or any residual carbonate into CO 2 with increasing temperature as reported before 31 , 32 .…”

Section: Resultsmentioning

confidence: 99%

Valorization of spent double substituted Co–Ni–Zn–Fe LDH wastewater nanoadsorbent as methanol electro-oxidation catalyst

Mahmoud

Mohamed

Hafez

et al. 2022

Sci Rep

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Finding suitable non-expensive electrocatalyst materials for methanol oxidation is a significant challenge. Waste valorization of spent wastewater nanoadsorbents is a promising route toward achieving circular economy guidelines. In this study, the residual of layered double hydroxide (LDH) can be used as an electrocatalyst in direct methanol fuel cells as a novel approach. The Co–Ni–Zn–Fe LDH was prepared by the co-precipitation method followed by the adsorption of methyl orange (MO). Moreover, the spent adsorbent was calcined at different temperatures (200, 400, and 600 °C) to be converted to the corresponding mixed metal oxides (MMO). The prepared samples were characterized using XRD, FTIR, HRTEM, zeta potential, and hydrodynamic size measurements. The spent adsorbent was tested as an electro-catalyst for direct methanol electro-oxidation. The spent LDH/MO adsorbent showed a maximum current density of 6.66 mA/cm2 at a 50 mV/s scan rate and a 1 M methanol concentration. The spent MMO/MO adsorbent showed a maximum current density of 8.40 mA/cm2 at a 200 °C calcination temperature, 50 mV/s scan rate, and a 3 M methanol concentration. Both samples show reasonable stability over time, as indicated by the chronoamperometric response. Further nanoengineering of used nanoadsorbents could be a promising path to repurposing these wastes as electro-oxidation catalysts.

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Synthesis and characterisation of LDH‐type anionic nanomaterials for the effective removal of doxycycline from aqueous media

Cited by 27 publications

References 62 publications

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

Efficiency of calcined Aluminum‐Magnesium layered double hydroxide for adsorption of aflatoxin M₁ from solution and matrix of milk

Valorization of spent double substituted Co–Ni–Zn–Fe LDH wastewater nanoadsorbent as methanol electro-oxidation catalyst

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Synthesis and characterisation of LDH‐type anionic nanomaterials for the effective removal of doxycycline from aqueous media

Cited by 27 publications

References 62 publications

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid

Efficiency of calcined Aluminum‐Magnesium layered double hydroxide for adsorption of aflatoxin M1 from solution and matrix of milk

Valorization of spent double substituted Co–Ni–Zn–Fe LDH wastewater nanoadsorbent as methanol electro-oxidation catalyst

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Efficiency of calcined Aluminum‐Magnesium layered double hydroxide for adsorption of aflatoxin M₁ from solution and matrix of milk