Magnetic mesoporous catalytic and adsorption active Fe-Al2O3 films

Mikhaylov, Vasily I.; Krivoshapkina, Elena F.; Belyy, V.A.; Исаенко, С. И.; Zhukov, M. V.; Gerasimov, Evgeny Yu.

doi:10.1016/j.micromeso.2019.04.003

Cited by 11 publications

(11 citation statements)

References 39 publications

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“…The Al(OH) 3 ‐PVA, Fe(OH) 3 , and Fe(OH) 3 ‐PVA sols were obtained by the method described in Ref. [17]. All sols were purified from excess electrolytes by dialysis against deionized water.…”

Section: Methodsmentioning

confidence: 99%

“…Kinetic measurements of hydrogen peroxide decomposition were performed under UV irradiation (Reptile UVB 150 lamp) as described in Ref. [17]. Nonlinear regression analysis of kinetic data was carried out using the Origin software (OriginLab Corporation).…”

Section: Methodsmentioning

confidence: 99%

“…Note that Cr(VI) adsorption capacity of sandwich-like films exceeds the sorption capacity of powdered Al/Fe oxide-oxyhydroxide sorbent systems, 26 synthetic Fe 2 O 3 -Al 2 O 3 nanocomposite, 27 hierarchical SiO 2 @γ-AlOOH spheres, 28 and magnetic mesoporous Fe-Al 2 O 3 films 17,18 (Table 4).…”

Section: Cr(vi) Adsorption Testmentioning

confidence: 99%

“…In our previous works, 17,18 we showed the possibility of obtaining self‐supporting composite films of Fe‐Al 2 O 3 using polyvinyl alcohol (PVA)‐assisted sol‐gel technology. In this paper, we consider the possibility of using this simple and easily scalable method (its modification) to obtain self‐supported sandwich‐like Al 2 O 3 /Fe 2 O 3 /Al 2 O 3 films, promising for solving the global environmental problem of water pollution.…”

Section: Introductionmentioning

confidence: 99%

“…14 On the other hand, high prevalence of aluminum and iron makes it possible to obtain low-cost synthetic (including nanostructured) adsorbents and catalysts with improved and reproducible characteristics, as well as other compounds with a wide range of functionalities. 15,16 In our previous works, 17,18 we showed the possibility of obtaining self-supporting composite films of Fe-Al 2 O 3 using polyvinyl alcohol (PVA)-assisted sol-gel technology. In this paper, we consider the possibility of using this simple and easily scalable method (its modification) to obtain self-supported sandwich-like Al 2 O 3 /Fe 2 O 3 /Al 2 O 3 films, promising for solving the global environmental problem of water pollution.…”

Section: Introductionmentioning

confidence: 99%

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The effect of layer thickness on adsorption and catalytic activity of sandwich‐like ceramics

et al. 2020

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Scalable and easily implementable sol‐gel approach for creating self‐supported sandwich‐like Al2O3/Fe2O3/Al2O3 films was proposed. A comprehensive study of the composition, microstructure, thermal, textural, catalytic, and adsorption properties were carried out. The possibility of varying the relative thickness of the layers allows to diversify functional properties of the materials. On the one hand, films with thick mesoporous alumina layers and a thin internal iron oxide layer behave as effective magnetically separable Cr(VI) adsorbents. On the other hand, thin thermally and chemically resistant mesoporous alumina layers, bounding the iron oxide layer, prevent degradation and deactivation of the catalytically active iron oxide sites in the catalysis process and provide full access of the reagents. The Al2O3/Fe2O3/Al2O3 films can be easily separated from a liquid medium due to rapid settling of large fragments and the possibility of magnetic separation. Thus, these films are convenient objects for various environmental applications.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Cr(vi) Adsorption Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of layer thickness on adsorption and catalytic activity of sandwich‐like ceramics

et al. 2020

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Modification of clinoptilolite with dialkylphosphinic acid for the selective removal of cobalt (II) and nickel (II) from hydrometallurgical effluent

Kabuba

Banza

2021

Can J Chem Eng

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This study describes the selective removal of cobalt (II) and nickel (II) from hydrometallurgical effluent using modified clinoptilolite. X-ray fluorescence (XRF), x-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis were used to characterize the natural and modified clinoptilolites with dialkylphosphinic acid. In a batch experiment, the influence of different variables such as initial concentration, pH, particle size, clinoptilolites dosage, temperature, and contact time was evaluated. Higher removal efficiency was obtained at initial concentration of 600 mg/L, pH 6, particles size of 1000-1400 μm, dosage of 10 g/100 mL, a temperature of 25 C, and contact time of 300 minutes. The experimental data fit satisfactorily to the pseudo-second order kinetic and to the Langmuir isotherm model. Thermodynamic parameters like Gibb's free energy (ΔG o ), enthalpy (ΔH o ), and entropy (ΔS o ) were also evaluated. The results revealed that modified clinoptilolite with dialkylphosphinic acid could be successfully employed for the selective removal of cobalt (II) and nickel (II) from hydrometallurgical effluent. K E Y W O R D Sclinoptilolite, cobalt (II) and nickel (II) selective removal, dialkylphosphinic acid, ion-exchange

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Investigation of temperature field for the in-situ fabrication of particle-reinforced alumina ceramics coating via laser induction

Zhang

Fang

et al. 2023

Applied Thermal Engineering

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Magnetic mesoporous catalytic and adsorption active Fe-Al2O3 films

Cited by 11 publications

References 39 publications

The effect of layer thickness on adsorption and catalytic activity of sandwich‐like ceramics

The effect of layer thickness on adsorption and catalytic activity of sandwich‐like ceramics

Modification of clinoptilolite with dialkylphosphinic acid for the selective removal of cobalt (II) and nickel (II) from hydrometallurgical effluent

Investigation of temperature field for the in-situ fabrication of particle-reinforced alumina ceramics coating via laser induction

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