Conversion of egg shell membrane to inorganic porous CexZr1-xO2 fibrous network

Jia Li, Ka Lok Chiu, Fung Luen Kwong, Dickon H.L. Ng, Sammy L.I. Chan

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The binary system CeO2-ZrO2 is thermally stable and has superior reduction-oxidation properties. It has been commonly used in the three-way catalytic converters for automobiles. In this work, an inorganic biomorphic porous CexZr1-xO2 fibrous network was successfully synthesized by using the egg shell membrane (ESM) as templates, and its morphology was a perfect replica of the original ESM. The synthesis involved a simple infiltration and calcination process. A fresh ESM was peeled from a chicken egg shell. It was soaked in a Ce(NO3)3 and Zr(NO3)4 mixture before it was calcined at 700 °C in ambient environment. The fibers in the biomorphic network had diameter ranged from 1 to 4 μm, and they were composed of CexZr1-xO2 nanocrystallites having an average grain size of ∼10 nm.

Original languageEnglish
Pages (from-to)1438-1444
Number of pages7
JournalCurrent Applied Physics
Volume9
Issue number6
DOIs
StatePublished - Nov 2009

Keywords

  • Biomorphic porous network
  • CeZrO
  • Egg shell membrane

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