Selective synthesis of anatase and rutile via ultrasound irradiation

A simple and efficient methodology has been established for the selective s ynthesis of anatase and rutile as well as their mixtures with various precu rsors using ultrasound irradiation; the products, the particle sizes of whi ch are nanometric (< 9 nm), are dependent both upon the reaction temperatur e and the precursor used; a substantial reduction in reaction time as well as reaction temperature is observed as compared to the corresponding hydrot hemal processes.