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Adak, Asok; Pathak, Amita; Pramanik, Panchanan

doi:10.1023/a:1006521603958

Cited by 78 publications

(27 citation statements)

References 7 publications

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“…They are commonly used in semiconductor and sensor technology as well as in heterogeneous catalysis [6][7][8][9][10][11][12][13][14]. Transition metal aluminates are commonly prepared by a solid state reaction [15], co-precipitation method [16], hydrothermal [17], combustion [18], and sol-gel [19,20]. The disadvantages of solid-state routes, such as inhomogeneity, lack of stoichiometry control, high temperature and low surface area, are improved when the material is synthesized using a solution-based method.…”

Section: Introductionmentioning

confidence: 99%

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Maddahfar

Ramezani

Sadeghi

et al. 2015

J Mater Sci: Mater Electron

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In this work, modify sol-gel method was used to synthesize nickel aluminate (NiAl 2 O 4 ) nanoparticles with aid of nickel nitrate hexahydrate and aluminium nitrate nonahydrate as the starting reagents in the presence of ethanol as the solvent. Besides, to examine the effect of different chelate agent such as citric acid monohydrate, oxalic acid, salicylic acid, and malic acid on the morphology and particle size of final products several tests were performed. The structural, morphological, and optical properties of as-obtained products were characterized by techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray microanalysis, scanning electron microscopy and ultraviolet-visible. The photocatalytic degradation was investigated using methyl orange under visible light irradiation (k [ 400 nm). The resulting degradation rates of the methyl orange were measured to be as high as 90 % in 270 min.

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Section: Introductionmentioning

confidence: 99%

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Maddahfar

Ramezani

Sadeghi

et al. 2015

J Mater Sci: Mater Electron

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“…monomer center. While the visible emission is ascribed to emission from the D-level, which is believed to originate from a charge transfer transition [10,13].Many fabrication methods of ZnAl 2 O 4 phosphor such as solid state reaction [14], co-precipitation [15], hydrothermal [16], combustion [17] and sol-gel [18] have been developed. As an alternative, in this work, we have adopted the sol-gel method [18], which is known to be a low-temperature technique, in order to obtain a low cost green phosphor for use in applications such as X-ray imaging device, low pressure lamps, and high-energy physics [18].…”

Section: Introductionmentioning

confidence: 99%

Effects of Pb2+ ions concentration on the structure and PL intensity of Pb-doped ZnAl2O4 nanocrystals synthesized using sol–gel process

Motloung

Dejene

Swart

et al. 2014

J Sol-Gel Sci Technol

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Undoped and Pb 2? -doped ultrafine cubic zinc aluminate (ZnAl 2 O 4 ) hosts were successfully prepared at a relatively low temperature (*80°C) using the sol-gel method. The concentration of Pb 2? was varied from 0 to 5 mol%. The TGA showed that the minimum annealing temperature required to obtain single phase ZnAl 2 O 4 must be above 400°C. The XRD data revealed that all the annealed samples were single phase crystalline structures and the estimated crystallites size were in the range of 21-30 nm in diameter. The FTIR results suggest that heattreating can destroy some of the bonds. The surface morphology of the phosphors was influenced by the Pb 2? mol%. Undoped and Pb 2? -doped ZnAl 2 O 4 nanoparticles exhibit the violet emission at slightly different positions. The slight peak shifts suggests the possibilities that the luminescence centre can either be due to the defects level in the host or Pb 2? ions. The emission peaks at 390 and 399 nm are ascribed to the typical UV transitions 3 P 0,1 ? 1 S 0 in Pb 2? ion. At the higher Pb 2? mol%, the luminescence quenching behaviour occurs, which suggests that doping with Pb 2? ions is accompanied by the introduction of new defect sites that enhance non-radiative recombination of the excited electrons.

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“…Transition metal aluminates are commonly prepared by a solid state reaction [7], coprecipitation method [8,9], hydrothermal [10][11][12], combustion [13] and sol-gel [14][15][16][17][18][19][20][21][22]. The disadvantages of solid-state routes, such as inhomogeneity, lack of stoichiometry control, high temperature and low surface area, are improved when the material is synthesized using a solution-based method.…”

Section: Introductionmentioning

confidence: 99%

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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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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Cited by 78 publications

References 7 publications

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

NiAl2O4 nanoparticles: synthesis and characterization through modify sol–gel method and its photocatalyst application

Effects of Pb2+ ions concentration on the structure and PL intensity of Pb-doped ZnAl2O4 nanocrystals synthesized using sol–gel process

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

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