Rapid synthesis of mesoporous ceria–zirconia solid solutions via a novel salt-assisted combustion process

Salt-assisted combustion synthesis of highly dispersed superparamagnetic CoFe2O4 nanoparticles

“…In our SCS process, the nature of the salt precipitation and its location are intimately connected to the prevention of the particles from sintering and the generation of the well-dispersed nanoparticles. We suggest that since the self-propagating combustion reaction releases large amount of heat in the very short time, resulting in instant high temperature of the reaction system, the salt precipitation in situ is completed in an instant to form a thin layer of salt crust on the surface of the newly formed nanoparticles [17]. After the rapid cooling, the salt-coated CoFe 2 O 4 nanoparticles are trapped into the salt matrix, since the frozen salt matrix is no longer able to move, which prevents the re-agglomeration of the newly formed crystallites and stabilize the derived nanoparticles [18].…”

Tuning the phase composition and particle characteristics of partially stabilized yttria and ceria co-doped zirconia nanocrystals via a sol–gel process with sodium chloride as an additive

“…However, the addition of a suitable amount of NaCl can help to control the morphology of PS-YCZ-NCs. In the previous studies in our group, we determined that the introduction of NaCl provided a hard agglomeration inhibitor when prepared ceria-zirconia solid solution [26]. Similarly, in this study, the addition of NaCl in a moderate amount can help to reduce the particle size and uniformly disperse the particles.…”

“…Many metal oxides, such as Sc 2 O 3 [19], Y 2 O 3 [20], Er 2 O 3 [21] and Al 2 O 3 [22], can be used to tune the phase structure of zirconia. However, the crystalline structure and phase state can also be affected by the media [23][24][25][26], additive [1,20], calcination temperature [27], sintering atmosphere [28] and grain size [29,30] during the preparation process.…”

“…Therefore, to obtain zirconia materials with the desired properties, it is crucial to understand the effects of tuning the particle characteristics and phase structure of materials during the preparation process. In our previous study, the introduction of sodium chloride (NaCl) to a modified sol-gel or combustion synthesis process was determined to significantly affect the particle size and the morphology of metal oxides, and a novel salt-assisted method was developed for the preparation of spherical nano-particles [26]. However, the effect of NaCl on the phase composition and particle characteristics of zirconia was not clear.…”

Thermally Stable CeO2–ZrO2–La2O3 Ternary Oxides Prepared by Deposition–Precipitation as Support of Rh Catalyst for Catalytic Reduction of NO by CO

“…Numerous technical routes have been developed in recent years to prepare the CeO 2 -ZrO 2 materials, including the high-temperature firing or high-energy ball milling [14], combustion synthesis [15][16][17], room temperature coprecipitation [18][19][20][21], sol-gel synthesis [22][23][24], hydrothermal synthesis [9,25], and supercritical synthesis [26]. However, these preparation techniques commonly cause poor thermal stability of the CeO 2 -ZrO 2 materials.…”