Synthesis of Wollastonite Single Crystal Nanowires by a Novel Hydrothermal Route

This article firstly reports the successful synthesis of wollastonite single crystal nanowires by hydrothermal route. We obtained xonotlite nanowires on hydrothermal condition at a lower temperature (180 °C) using cationic surfactant as template. The nanowires have high aspect ratios more than 100 with diameters of 50–100 nm. After calcination at 800 °C for 2 h, xonotlite nanowires transformed to wollastonite and the fibrous structure was preserved. They were characterized by powder X-ray diffractometry (XRD), transmission electron microscopy (TEM). The mechanism of wollastonite nanowires formation was also discussed.