Preparation of Ultrafine Rutile Titania Crystals by Liquid Method

Rutile titania crystals were directly prepared in liquid system without anatase-to-rutile transformation, while Ti(SO4)(2) and ammonia are the raw materials. The process of preparation can be divided into two parts: one is precipitating, the other is peptizing. The conditions of precipitating influence the structure of the resulted crystals, even though Ti(OH)(4) precipitates obtained during precipitating are amorphous. Peptizing is the process of the formation of crystals, the amorphous Ti(OH)(4) precipitates changing into titania with the change of rutile structure.