A novel porous La2Zr2O7 ceramic aerogels with ultralow thermal conductivity and photocatalytic property

De bao Liu, Fei fei Zhou, Li jie Qu, Yi guang Wang, Bao sheng Xu*, Shi gang Ai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)2772-2782
Number of pages11
JournalJournal of the American Ceramic Society
Volume105
Issue number4
DOIs
Publication statusPublished - Apr 2022

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