Chemical synthesis of nanocrystalline magnesium aluminate spinel via nitrate–citrate combustion route

Nanocrystalline Copper aluminate (CuAl 2 O 4 ) was prepared by sol-gel technique using aluminum nitrate, copper nitrate, diethylene glycol monoethyl ether and citric acid were used as precursor materials. This method starts from of the precursor complex, and involves formation of homogeneous solid intermediates, reducing atomic diffusion processes during thermal treatment. The formation of pure crystallized CuAl 2 O 4 nanocrystals occurred when the precursor was heat-treated at 600°C in air for 2 h. The stages of the formation of CuAl 2 O 4 , as well as the characterization of the resulting compounds were done using thermo-gravimetric analysis, X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. The products were analyzed by transmission electron microscopy and ultraviolet-visible (UV-Vis) spectroscopy to be round, about 17-26 nm in size and E g = 2.10 eV.

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“…In other to other paper [43] have two different roles. (1) Citric acid as a chelating agent binds metallic ions (Al 3?…”

Section: Resultsmentioning

confidence: 97%

Synthesis and characterization of spinel-type CuAl2O4 nanocrystalline by modified sol–gel method

Salavati‐Niasari

Davar

Farhadi

2009

J Sol-Gel Sci Technol

144

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“…For the sample calcined at 700°C, all organic bands disappeared and two new high-frequency absorption peaks appeared at about 518 and 692 cm ¹1 , which are related to the AlO 6 octahedra 24) and MgO stretching. 25), 26) This demonstrated that the crystalline phase of MgAl 2 O 4 spinel could be formed at this temperature. In addition, the bands related to MgOAl became stronger at higher calcination temperatures.…”

Section: ¹1mentioning

confidence: 86%

Synthesis and adsorption properties of mesoporous MgAl2O4 spinel fibers by coaxial electrospinning

Wei

et al. 2018

J. Ceram. Soc. Japan

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Mesoporous magnesium aluminate (MgAl 2 O 4 ) spinel fibers were prepared using a coaxial electrospinning technique. The phase composition, porous structure and adsorption performance of the mesoporous MgAl 2 O 4 spinel fibers were investigated. Differential thermal/thermo-gravimetric and X-ray-diffraction analysis revealed that gel fibers began to crystallize into the MgAl 2 O 4 spinel phase at 700°C and became fully crystallized at 900°C. The morphology changes in the fibers were tracked by use of a scanning electron microscope and transmission electron microscope, which showed fibers with a mesoporous structure formed at 900°C. The BrunnerEmmet-Teller specific surface area of MgAl 2 O 4 spinel fibers is 36.95 m 2 /g. In addition, the dye adsorption capacity of the fibers shows an adsorption percentage of over 80.0% in 20 mg/l methylene blue after 2 min of adsorption. The kinetic study demonstrated that the adsorption data fit the pseudo-second-order kinetic model more naturally.

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“…19) The absorption bands within the range of 500700 cm ¹1 assigned to the vibrations of the characteristic AlOMg bond became broad.…”

Section: ¹1mentioning

confidence: 98%

“…15), 19) In the FTIR spectrum of the sample after calcination at 600°C, two absorption peaks at 540 and 700 cm ¹1 appeared, which were corresponded to the characteristic stretching vibration of AlO and MgO in MgAl 2 O 4 spinel, respectively.…”

Section: ¹1mentioning

confidence: 98%

Synthesis and characterisation of MgAl2O4 spinel nanopowders via nonhydrolytic sol–gel route

Wei

Cui

et al. 2017

J. Ceram. Soc. Japan

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Magnesium aluminate spinel (MgAl 2 O 4 ) nanopowders were synthesized via nonhydrolytic solgel route using anhydrous ethanol, aluminium chloride and magnesium chloride as raw materials. The samples were characterized using differential thermal and thermogravimetric analyses, X-ray diffraction, Fourier transform infrared spectroscopy, BrunauerEmmetTeller analysis, dynamic light scattering, scanning electron microscopy and transmission electron microscopy. The results showed that the powders with a single MgAl 2 O 4 spinel phase were obtained after annealing the gel precursor at 900°C, and their average particle size and BET specific surface area were about 30 nm and 43.57 m 2 /g. In addition, the synthesized MgAl 2 O 4 spinel nanopowders possessed mesoporous structure with the pore diameter between 350 nm. The MgAl 2 O 4 spinel nanopowders also exhibited superior sintering properties.

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Chemical synthesis of nanocrystalline magnesium aluminate spinel via nitrate–citrate combustion route

Cited by 138 publications

References 16 publications

Synthesis and characterization of spinel-type CuAl2O4 nanocrystalline by modified sol–gel method

Synthesis and characterization of spinel-type CuAl2O4 nanocrystalline by modified sol–gel method

Synthesis and adsorption properties of mesoporous MgAl<sub>2</sub>O<sub>4</sub> spinel fibers by coaxial electrospinning

Synthesis and characterisation of MgAl<sub>2</sub>O<sub>4</sub> spinel nanopowders via nonhydrolytic sol–gel route

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Chemical synthesis of nanocrystalline magnesium aluminate spinel via nitrate–citrate combustion route

Cited by 138 publications

References 16 publications

Synthesis and characterization of spinel-type CuAl2O4 nanocrystalline by modified sol–gel method

Synthesis and characterization of spinel-type CuAl2O4 nanocrystalline by modified sol–gel method

Synthesis and adsorption properties of mesoporous MgAl<sub>2</sub>O<sub>4</sub> spinel fibers by coaxial electrospinning

Synthesis and characterisation of MgAl<sub>2</sub>O<sub>4</sub> spinel nanopowders via nonhydrolytic sol&ndash;gel route

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Synthesis and characterisation of MgAl<sub>2</sub>O<sub>4</sub> spinel nanopowders via nonhydrolytic sol–gel route