FT-Raman Spectroscopic Studies of the Degradation of Titanium Peroxy Gels Made from Metallic Titanium and Hydrogen Peroxide

✍ Scribed by Pentti Tengvall; Trine Platou Vikinge; Ingemar Lundström; Bo Liedberg

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 240 KB
• Volume: 160
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1993.1362

✦ Synopsis

The chemical structures of fresh and aged Ti-peroxy gels, made from metallic titanium and hydrogen peroxide, were analyzed in the aqueous and solid states by FT-Raman spectroscopy. Fresh transparent gels displayed strong Ti-peroxy vibrations. In gels aged for 3 years in the aqueous state the dried precipitate was rutile. Fresh transparent gels were freeze-dried first, and then aged for 3 years in the dry state, however, displayed Tiperoxide and anatase vibrations. Accelerated degradation and aging of solids of fresh transparent gels by heat treatment at (200^{\circ} \mathrm{C}) gave rise to a white precipitate identified as anatase. Additional heat treatment of the white precipitate at (1050^{\circ} \mathrm{C}) showed bands characteristic of rutile. The present study shows that rutile is the main degradation product formed in aging aqueous (\mathrm{Ti}) peroxy gels. (9) 1993 A Aeatemic Press, Ime.