Preparation, Characterization, and Spectral Studies on Nanocrystalline Anatase TiO2

✍ Scribed by K. Madhusudan Reddy; C.V. Gopal Reddy; S.V. Manorama

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 369 KB
• Volume: 158
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9090

✦ Synopsis

Fine polycrystalline, nanoparticles of pure anatase titanium dioxide (average crystallite size &3+10 nm) with high surface area ( &210 m 2 /g) have been synthesized in the pure anatase phase. Synthesized powder is characterized by DTA+TGA, FT+IR, XRD, BET surface area, SEM, TEM, and UV+Visible absorption spectroscopy. Polymer capping of the synthesized TiO 2 particles showed an improved stability against agglomeration and photo-degradation. The prepared nanoparticles showed a blue shift in the absorption spectra. Bandgap energy values observed for di4erent particle sizes are 3.167 (3 nm), 3.145 (6 nm), and 3.027 eV (39 nm) for commercial TiO 2 . TiO 2 is encapped with eriochromcyanin dye; the nanoparticles showed a noticeable shift in the acquired color toward the blue region with the decrease in the particle size.