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Title: Characterisation of supported and unsupported 12-heteropolyacids
Author: Derrick, Glyn
Awarding Body: Open University
Current Institution: Open University
Date of Award: 2009
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Phase transformations of H₄4[SiW₁₂0₄₀]xH₂0 in the temperature range 25 - 900 ⁰C have been investigated and characterised by differential thermal analysis (DTA), thermogravimeteric analysis (TGA), X-ray powder diffraction (XRD), ²⁹Si MAS NMR and FT-IR spectroscopy. Dehydration occurs between 25 - 300 °C to give three crystalline hydrated states (x = 24, 14 and 6) and finally an anhydrous form.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available