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Well-dispersed spherical amorphous alumina nanoparticles with a narrow size distribution were obtained by facile homogeneous precipitation and subsequent calcination. In the synthesis, formamide was used as the precipitant, and mixtures of aluminum sulfate and aluminum nitrate with different molar ratios were used as the aluminum sources. The average size of the amorphous alumina nanoparticles was...
Amorphous titania (TiO2) is an important precursor for synthesis of single-phase nanocrystalline anatase. Dispersed equiaxed amorphous TiO2 nanoparticles with controlled sizes were synthesized by a facile sol–gel process and calcination. The Fourier transform infrared spectroscopy and thermogravimetric analyses indicated that after calcination at 320°C for 2h, the product is pure TiO2. The amorphous...
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