Naslov
Sol–gel synthesis of manganese-doped ceria from acetylacetonate precursors

Autori
Kurajica, Stanislav ; Ivković, Ivana Katarina ; Mužina, Katarina ; Mandić, Vilko ; Panžić, Ivana ; Matijašić, Gordana ; Alić, Emina Ema

Izvornik
Journal of sol-gel science and technology (0928-0707) 101 (2022), 1; 256-268

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
manganese doped ceria ; nanopowders ; sol-gel

Sažetak
Pure and manganese-doped ceria nanopowders were prepared by the sol-gel method using cerium acetylacetonate hydrate and manganese acetylacetonate as precursors, while methanol and ethylene glycol were used as a double solvent. The prepared materials have been characterized by X- ray diffraction, Fourier transformed infrared spectroscopy, differential thermal and thermogravimetric analysis, scanning electron microscope, atomic force microscope, and N2 adsorption/desorption isotherms. In the course of synthesis and aging, hydrolysis of the precursors and gel formation were achieved. The process was more advanced in the doped samples. Grain growth kinetics pointed out that manganese inhibits the grain growth rate of ceria. On the basis of thermal evolution characterization, 500 °C and 2 h were selected as thermal treatment parameters. Pure ceria was the only crystal phase obtained, while the decrease of lattice constant revealed the entrance of Mn in the crystal lattice of ceria. Doped samples displayed smaller crystallite sizes and greater specific surface areas in comparison with pure sample. The catalytic efficiency of the prepared samples was tested for toluene oxidation and it was established that doping with manganese improves the catalytic efficiency of ceria.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA