Abstract
Porous La2Zr2O7 ceramic aerogels (CAs) were prepared by sol-gel template method and thermal treated process. The microstructure and crystallisation behavior of the samples were systematically characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. The results indicated that the as-prepared porous La2Zr2O7 CAs had a single-phase pyrochlore structure with typical three-dimensional (3-D) porous structure. Meanwhile, the formation mechanisms of the as-prepared porous La2Zr2O7 CAs were investigated. At the same time, the as-prepared porous La2Zr2O7 CAs presented an ultralow room-temperature thermal conductivity of 0.07 W/(m K), high specific surface areas of 325.17 m2/g, and a relatively high compressive strength of 11.95 MPa. What's more, the as-prepared porous La2Zr2O7 CAs possessed ideal photocatalytic activities due to its high crystallinity, large surface area as well as unique 3-D porous structure. Therefore, the present work is proposing some new insight to prepare rare-earth zirconates CAs with porous structures for thermal insulation and dye degradation applications.
Original language | English |
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Pages (from-to) | 2772-2782 |
Number of pages | 11 |
Journal | Journal of the American Ceramic Society |
Volume | 105 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2022 |