New hierarchically porous titania monoliths for chromatographic separation media

✍ Scribed by George Hasegawa; Kei Morisato; Kazuyoshi Kanamori; Kazuki Nakanishi

• Book ID: 102446681
• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 276 KB
• Volume: 34
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.201100538

✦ Synopsis

Abstract

Separation media based on hierarchically porous titania (TiO~2~) monoliths for high‐performance liquid chromatography (HPLC) have been successfully fabricated by the sol–gel process of titanium alkoxide in a mild condition utilizing a chelating agent and mineral salt. The as‐gelled TiO~2~ monoliths were subjected to a simple solvent exchange process from ethanol (EtOH) to H~2~O followed by drying and calcination. The resultant monolithic TiO~2~ columns consist of anatase crystallites with the typical specific surface area of more than 200 m^2^/g. The resultant monolithic TiO~2~ column calcined at 200 and 400°C exhibited a good separation performance for organophosphates as well as for polar benzene derivatives in the normal‐phase mode.