{sup 17}O NMR studies of titanate repolymerization in water

Conference · Fri Aug 01 00:00:00 EDT 1997

OSTI ID:500986

Bunker, B C; Peden, C H.F. ^[1]; Kirkpatrick, R J ^[2]; Turner, G L ^[3]

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1. Pacific Northwest National Lab., Richland, WA (United States)
2. Univ. of Illinois, Urbana, IL (United States)
3. Spectral Data Services, Champaign, IL (United States)

Local structures of high surface area sodium titanate materials have been examined as a function of pH using solid state {sup 17}O nuclear magnetic resonance (NMR) spectroscopy. Using {sup 17}O NMR, it is possible to determine the relative populations of nonbridging oxygens as well as oxygens bridging between two, three, and four titanium atoms. Results show that protonation of ion exchange sites in titanate materials is not a simple ion exchange process but involves a repolymerization and restructuring of the titanate network. The observed structural changes are consistent with reported phase stabilities of titanates in water as well as with known hydrolysis and condensation reactions.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 500986
• Report Number(s): CONF-960401--; ISBN 1-55899-335-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEHYDROCYCLIZATION
HYDROLYSIS
ION EXCHANGE
MOLECULAR STRUCTURE
MORPHOLOGICAL CHANGES
NMR SPECTRA
PH VALUE
PHASE STUDIES
SODIUM COMPOUNDS
SORPTIVE PROPERTIES
TITANATES