Opal Gels Templated Synthesis of Structured Titania Materials

✍ Scribed by Jianhua Rong; Jin Ma; Zhenzhong Yang

• Book ID: 102496241
• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 458 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200400330

✦ Synopsis

Abstract

Summary: Core/shell opal gels of sulfonated polystyrene were used as templates to synthesize structured crystalline titania materials. Under acidic conditions, opal materials with hollow spheres of controllable shell thickness and cavity size were prepared. Under neutral conditions, inverse opal inorganic materials with a tunable pore size were prepared. It is crucial that proton ions induce a preferential sol/gel process, forming titania in the gel.

Scanning electron micrograph of the interior region of a structured titania material derived from the G1 template used here. The inset shows broken spheres in which the internal cavity can be observed.

imageScanning electron micrograph of the interior region of a structured titania material derived from the G1 template used here. The inset shows broken spheres in which the internal cavity can be observed.