Sonochemical synthesis of mesoporous transition metal and rare earth oxides

Yanqin Wang, Lunxiang Yin, Arahon Gedanken

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Straight-extended layered mesostructures based on transition metal (Fe, Cr) and rare earth (Y, Ce, La, Sm, Er) oxides are synthesized by sonication for 3 h. After a longer period of sonication (6 h), hexagonal mesostructures based on Y- and Er-oxides are obtained. The surface areas of the Y-based hexagonal mesophases before and after extraction are 46.5, 256 m2/g, respectively. For Er-based hexagonal mesophases, the surface areas before and after extraction are 157 and 225 m2/g. The pore sizes after extraction are 5.0 and 2.2 nm for Y- and Er-based mesophases, respectively. Hexagonal mesostructures are also obtained for Zr-based material after sonication for 3 h and the hexagonal structure is still maintained after calcinations at 400°C for 4 h, although the surface area is only 35 m2/g.

Original languageEnglish
Pages (from-to)285-290
Number of pages6
JournalUltrasonics Sonochemistry
Volume9
Issue number6
DOIs
StatePublished - Nov 2002

Keywords

  • Hexagonal structure
  • Layered structure
  • Mesophases
  • Sonication

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