Thermal decomposition synthesis of 3D urchin-like α-Fe2O3 superstructures

✍ Scribed by Jiao Hua; Yang Heqing

• Book ID: 104063853
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 943 KB
• Volume: 156
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2008.11.025

✦ Synopsis

Urchin-like ␣-Fe 2 O 3 superstructures have been deposited on Si substrate using thermal decomposition FeCl 3 solution at 200-600 • C in the oven. The morphologies and structures of the synthesized urchin-like superstructures have been characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The results show that urchin-like ␣-Fe 2 O 3 superstructures were a polycrystal with the rhombohedral structure and typical diameters of 16-20 nm and lengths up to 1.0 m. The as-prepared ␣-Fe 2 O 3 superstructures have a high Brunauer-Emmett-Teller (BET) surface area of about 60.24 m 2 /g. The photoluminescence spectrum of the urchin-like ␣-Fe 2 O 3 superstructures consists of one weak emission peak at 548 nm (2.26 eV). A possible new mechanism for the formation of the urchin-like superstructures was also preliminarily discussed.