Improved structural and catalytic attributes of Ba2Co2Fe12−2x(Zr,Ni)xO22 materials synthesized by sol–gel and microwave heating methods

Abstract

Nominal composition of Zr-Ni co-doped Ba 2 Co 2 Fe 12À2x (Zr,Ni) x O 22 (x ¼ 0.2-1.0) Y-type hexaferrites were synthesized by conventional sol-gel and microwave heating methods. Structural analysis was carried out by TGA, SEM, XRD, O 2 -TPD and BET surface area. Microwave synthesized samples revealed good morphological properties with high surface area and high porosity compared to that obtained by the sol-gel method. Catalytic decomposition of N 2 O was achieved at low temperatures of 600 C and 700 C for microwave and sol-gel prepared samples, respectively. The catalysts are found workable and stable even at 1146 C with very good N 2 O decomposition efficiency. Substituting iron with Zr-Ni further enhanced the catalytic activity in both the cases.

Electrical and thermoelectric attributes of Ba2Co2Fe12−2x(Ti–Mn)xO22 and their catalytic activity for complete N2O decomposition

“…Keeping this in view, we reported the catalytic properties of closely related compounds of the same class in the recent past for N 2 O decomposition reaction. 15,16 N 2 O is considered as one of the environmental hazards because of its greenhouse effect on the environment, but more importantly it is used as a fuel for aerospace. N 2 O is a promising green propellant and it is preferred over conventional hydrazine because of its ability to self-pressurize and compatibility with common construction materials.…”