Sol–gel synthesis and characterization of the binary Ni–Mg–O oxide system

Karnaukhov, Timofey M.; Cherepanova, Svetlana V.; Rogov, Vladimir A.; Mishakov, Ilya V.

doi:10.1007/s10971-019-05076-2

Cited by 17 publications

(14 citation statements)

References 28 publications

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“…This con rms the Mg doped NiO nanoparticles and its heterogeneous dispersed on the surface of the F-MWCNTs. The results obtained from the FESEM analysis are similar to a study prepared by Saravanakkumar et al [26], Karnaukhov et al [27], and Mustafa et al [28].…”

Section: Morphological Measurementssupporting

confidence: 87%

WITHDRAWN: Mg-doped NiO Nanoparticles Decorated Multi-Walled Carbon Nanotube (MWCNT) Nanocomposite and their Biological Activities

Taha

Mka

et al. 2021

Preprint

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Here we report a novel nanocomposite composed from Mg-doped NiO and Mg-doped\MWCNT using a facile sol-gel method. The synthesized Mg-doped NiO and Mg-doped\MWCNT nanocomposite was characterization by XRD diffraction (XRD), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and UV–Vis spectrophotometer. The X-Ray analysis revealed that the formation of nanocomposites, which has a cubic phase and a high crystalline nature. The FE-SEM images confirmed the success of decoration the 6%Mg- doped NiO on the surface of the treated MWCNT through the emergence of spherical shapes over the cylindrical tubes. Conversely, optical measurements reveal that the energy gap value for the Mg-NiO and the Mg/NiO-MWCNT nanocomposite are 3.28 and 2.82 eV, respectively. This indicates decreasing the zone between conduction band and valance band. Moreover, it found that Mg doped NiO\MWCNT nanocomposite showed high removal efficiency towards the lead element compared with the Mg-doped NiO. Also, MTT test was employed to study antitumor activity against MCF-7 and WRL68 cells. Our results showed that the Mg doped NiO-MWCNT had cell viability of 66.7 and 71.9% against MCF-7 and WRL68, respectively. Whereas, Mg-doped NiO sample showed cell viability of 70.2 and 71.9% against MCF-7 and WRL68, respectively.

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Section: Morphological Measurementssupporting

confidence: 87%

WITHDRAWN: Mg-doped NiO Nanoparticles Decorated Multi-Walled Carbon Nanotube (MWCNT) Nanocomposite and their Biological Activities

Taha

Mka

et al. 2021

Preprint

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“…Both the oxides belong to the NaCl structural type and have very close lattice parameters: NiO—Fm3m, a = 4.177 Å; MgO—Fm3m, a = 4.211 Å. Therefore, these oxides can easily form solid solutions [ 32 ]. No molybdenum-containing phase was observed that presumably testifies towards roentgen-amorphous molybdenum clusters uniformly distributed within the bulk of the oxide matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we reported the application of the sol-gel method for the preparation of two-component MgO-based systems [ 29 , 30 , 31 , 32 , 33 ]. The preparation procedures included the hydrolysis of magnesium methoxide in a methanol/toluene solution, the drying of the formed gel in air (or supercritical drying), and the calcination of the xerogel in a muffle.…”

Section: Introductionmentioning

confidence: 99%

“…Initially, the approach considered the hydrolysis of magnesium methoxide by water with the subsequent addition of an organic precursor of the second component [ 29 ]. In recent works, an aqueous solution of an inorganic precursor of the second component was used instead of pure water during the hydrolysis stage [ 30 , 31 , 32 , 33 ]. In the present research, this modified approach was applied to prepare the nanoparticles of Ni and Mo oxides distributed within the MgO matrix.…”

Section: Introductionmentioning

confidence: 99%

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Sol-Gel-Prepared Ni-Mo-Mg-O System for Catalytic Transformation of Chlorinated Organic Wastes into Nanostructured Carbon

et al. 2020

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The present work aimed to prepare Ni-Mo particles distributed within the MgO matrix. With this purpose in mind, a ternary Ni-Mo-Mg oxide system was synthesized by a sol−gel approach. The samples were studied by low-temperature nitrogen adsorption, X-ray diffraction analysis, and transmission electron microscopy equipped with energy dispersive X-ray analysis. Both the nickel and molybdenum species in the prepared samples were characterized by a fine and uniform distribution. The diffraction pattern of the ternary system was predominantly represented by the MgO reflections. The catalytic activity of the samples was tested in the decomposition of 1,2-dichloroethane used as a representative of the chlorinated organic wastes. The nanostructured carbon filaments resulting from the decomposition of the halogenated substrate were found to be characterized by a narrow diameter distribution, according to the transmission electron microscopy data, thus confirming the fine distribution of the active Ni-Mo particles. The results obviously show the advantages of the sol−gel technique for obtaining efficient catalysts.

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“…Ni-Mg-O is another binary system where nickel oxide species are uniformly distributed within the magnesium oxide matrix. Partial substitution of magnesium ions with nickel ions can result from a solid solution during the process, and the prominent hydrogen uptake occurs at about 350-550 • C [240]. Overall, among the metal-oxide cycles, Zn/ZnO and FeO/Fe 3 O 4 thermochemical cycles represent higher hydrogen production and can be used as a new research direction.…”

Section: Other Metal Oxide Cyclesmentioning

confidence: 99%

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

2022

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The thermochemical water-splitting method is a promising technology for efficiently converting renewable thermal energy sources into green hydrogen. This technique is primarily based on recirculating an active material, capable of experiencing multiple reduction-oxidation (redox) steps through an integrated cycle to convert water into separate streams of hydrogen and oxygen. The thermochemical cycles are divided into two main categories according to their operating temperatures, namely low-temperature cycles (<1100 °C) and high-temperature cycles (<1100 °C). The copper chlorine cycle offers relatively higher efficiency and lower costs for hydrogen production among the low-temperature processes. In contrast, the zinc oxide and ferrite cycles show great potential for developing large-scale high-temperature cycles. Although, several challenges, such as energy storage capacity, durability, cost-effectiveness, etc., should be addressed before scaling up these technologies into commercial plants for hydrogen production. This review critically examines various aspects of the most promising thermochemical water-splitting cycles, with a particular focus on their capabilities to produce green hydrogen with high performance, redox pairs stability, and the technology maturity and readiness for commercial use.

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Sol–gel synthesis and characterization of the binary Ni–Mg–O oxide system

Cited by 17 publications

References 28 publications

WITHDRAWN: Mg-doped NiO Nanoparticles Decorated Multi-Walled Carbon Nanotube (MWCNT) Nanocomposite and their Biological Activities

WITHDRAWN: Mg-doped NiO Nanoparticles Decorated Multi-Walled Carbon Nanotube (MWCNT) Nanocomposite and their Biological Activities

Sol-Gel-Prepared Ni-Mo-Mg-O System for Catalytic Transformation of Chlorinated Organic Wastes into Nanostructured Carbon

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

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