Template-Free Synthesis and Properties of Mesoporous Calcium Titanate

Resumo

X-ray amorphous powder was obtained via template-free synthesis, including the sol–gel process and coprecipitation. We showed that mesoporous calcium titanate is formed during the calcination of a powder up to 800°C. The structure and morphology of the samples thermally processed at 200, 400, 600, and 800°C are studied with scanning electron microscopy, X-ray phase analysis, thermogravimetric analysis, and IR spectroscopy. Low-temperature adsorption–desorption of nitrogen vapors and laser diffraction analysis showed that calcium titanate powder has a highly developed surface of over 100 m²/g with average particle size from 99 to 290 nm and significant pore volume.