Microporous and mesoporous 8YSZ materials derived from polymeric acetylacetone-modified precursors for inorganic membrane applications

Synthesis and Characterization of Microporous ZrO2Membranes for Gas Permeation at 200°C

“…These values fall below the ones encountered in this work. When higher BET surface areas values are reported, these are generally related to an increase of the mesoporosity of the zirconia material (18).…”

“…The application of zirconia crack-free membranes has been limited to microfiltration (16) or ultrafiltration (17), given the difficulty of controlling the pore size to provide molecular sieves effective in gas separation. Microporous membrane materials have been recently prepared by polymeric sol-gel method, but using acetylacetone as precursor in order to control the reactivity of Zr propoxide used as precursor, and the final porosity of the material (18)(19)(20). However, their drawback is that removal of the organic by calcination may alter the microporosity and pore size and shape of the final membrane (17).…”

Effect of sol size on nanofiltration performance of a sol–gel derived microporous zirconia membrane

“…It is well known that microporous materials present type I sorption isothermal characteristic and hold large V micro /V total ratio [32,33]. Nitrogen adsorption-desorption isotherms of DZ powder are shown in Fig.…”

Nano Single Crystals of Yttria-Stabilized Zirconia

“…2 Nanoparticles with a narrow size distribution are suitable for the production of high-quality ceramics. A large variety of chemical methods have been developed to synthesize nanocrystalline YSZ, including low temperature processes, such as sol-gel from alkoxyde precursors 3,4 or metallic salts, 5,6 and precipitation. 7,8 These methods typically involve the formation of an amorphous precipitate followed by calcination above 400 °C in order to obtain crystalline precursors.…”

“…Nanoparticles with a narrow size distribution are suitable for the production of high-quality ceramics. A large variety of chemical methods have been developed to synthesize nanocrystalline YSZ, including low temperature processes, such as sol−gel from alkoxyde precursors , or metallic salts, , and precipitation. , These methods typically involve the formation of an amorphous precipitate followed by calcination above 400 °C in order to obtain crystalline precursors. Hydrothermal synthesis is advantageous, as nanoparticles are generated at a lower temperature, typically below 200 °C, , as the solvatation properties of water are thereby greatly affected and nucleation and growth of metastable crystals are favored.…”