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

Abstract

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.

The influence of substrate temperature on properties of Cu-Al-O films deposited using the reactive ion beam sputtering method

“…In these spectra, the weak absorption peaks within the range 630…635 cm -1 and intense weak absorption peaks within the range 960…1045 cm -1 are observed. These weak absorption peaks are associated with Cu-O and Al-O vibrations in CuO, Cu 2 O, AlCu 2 O 4 and AlCuO 2 films [14][15][16][17][18]. The intense absorption peak was also observed in the FTIR spectrum of Si substrate (Fig.…”

Effect of copper doping on CoTiO3 ilmenite type nanoparticles for removal of congo red from aqueous solution

“…Nanoparticles of CuAl 2 O 4 and CuFe 2 O 4 were shown catalytic activity [26,27]. These nano particles have been reported as good adsorption activities for many organic dyes [28].…”

Diffusion-controlled growth of CuAl2O4 nanoparticles: effect of sintering and photodegradation of methyl orange

“…These peaks are in close agreement with other synthesis methods. [31,45,46] The band at 3200À3700 cm ¡1 was attributed to the longitudinal vibrations of the OH bond in water. The band at 1643 cm ¡1 was due to the bending of the HÀOÀH bond of water.…”