Adsorption performance of SO2 over ZnAl2O4 nanospheres

Insight into the potential application of CuOx/CeO2 catalysts for NO removal by CO: a perspective from the morphology and crystal-plane of CeO2

“…57–59 The chelating bidentate nitrate species can be observed at 1564 cm −1 for CuO x /CeO 2 -H and CuO x /CeO 2 -T, 1570 cm −1 for CuO x /CeO 2 -C and 1582 cm −1 for CuO x /CeO 2 -F catalysts, as well as the sulfate species situated from 1050 to 1300 cm −1 , where 1127 cm −1 in CuO x /CeO 2 -H, 1130 cm −1 in CuO x /CeO 2 -T, 1140 cm −1 in CuO x /CeO 2 -C and 1119, 1197 cm −1 in CuO x /CeO 2 -F are attributed to the bulk sulfate/bidentate sulfate, and 1200 cm −1 in CuO x /CeO 2 -H, 1210 cm −1 in CuO x /CeO 2 -T as well as 1236 cm −1 in CuO x /CeO 2 -C are described as the stretching motion of adsorbed sulfate. 60–63 The peaks located at 986 cm −1 (CuO x /CeO 2 -H), 993 cm −1 (CuO x /CeO 2 -T), 1016 cm −1 (CuO x /CeO 2 -C) and 983 cm −1 (CuO x /CeO 2 -F) can be attributed to the stretching motion of surface-coordinated bisulfite and/or sulfite. 64,65 Besides, the absorption peak of CuO x /CeO 2 -T at 1372 cm −1 belongs to the asymmetric stretching vibrations of OSO species, revealing that the catalyst is susceptible to the influence of SO 2 .…”

Effect of Cu2+ ions on structural, morphological, optical and magnetic behaviors of ZnAl2O4 spinel

“…Rare mineral ZnAl 2 O 4 which have normal spinel structure exhibit excellent optical, electrical and magnetic behavior [14,15]. Zinc aluminate used as catalysts [16], high temperature materials [17] and optical materials [18,19].…”

“…Magnetic, optical, electrical and structural characteristics of host materials can be improved by doping of copper ions which lead to alter the chemical composition of host material. Even though zinc atoms are non-magnetic, addition of copper ions modify the whole structure of host material (from normal spinel to inverse spinel) and improve the magnetic characteristics [19]. Especially copper doped metal aluminates utilized in different applications like gas-sensor, massive storage and spintronic device.…”

Ni–Zn–Al-Based Oxide/Spinel Nanostructures for High Performance, Methane-Selective CO2 Hydrogenation Reactions

“…Interestingly, NiAl 2 O 4 was found to minimize the coke formation in CO 2 reforming of methane [27]. Besides nickel based spinels, zinc based spinels were also used in various fields such as in catalysis [15,[28][29][30], adsorption [31] and optics [32] due to their superior catalytic activity and high thermal stability [33]. However, the catalytic applications of these spinel materials for CO 2 hydrogenation is not reported.…”