Naslov
Properties and potential applications of manganese-doped ceria gained by mechanochemical synthesis

Autori
Ivković, Ivana Katarina ; Kurajica, Stanislav ; Duplančić, Marina ; Faraguna, Fabio ; Grbešić, Tea

Izvornik
ChemistrySelect (2365-6549) 7 (2022), 4; E202104181, 9

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

Ključne riječi
ceria ; manganese doping ; mechnanochemical synthesis ; nanoparticles ; thermal decomposition

Sažetak
Manganese doped nanosized ceria samples were prepared by mechanochemical synthesis. Characterization was done using X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS) and others. Different conditions of synthesis were tried. Beside cerium carbonate, cerium chloride and amorphous phase remain in the product. Cerium carbonate decomposes around 250°C, while the decomposition process centered at 330°C was attributed to cerium chloride decomposition. Along with ceria, birnessite occurs in doped samples after thermal treatment and washing. Ceria lattice constant is reduced from 5.405 Å for pure sample to 5.401 Å for the 30% doped sample as a consequence of manganese entrance in the ceria lattice. Ceria bandgap is significantly reduced with doping. Particle size was far greater than crystallite size due to a strong tendency toward agglomeration. All prepared powders proved to be efficient catalysts for toluene oxidation with the 30% doped sample being the most promising.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA