Department of Chemistry and Biology, Jackson State University, Jackson, Mississippi, United States of America.
PLoS One. 2011;6(6):e21082. doi: 10.1371/journal.pone.0021082. Epub 2011 Jun 15.
A new methodology was developed to synthesize uniform titania anatase nanocrystals by the hydrolysis of titanium chloride in sulfuric acid aqueous solutions at 0-90°C. The samples were characterized by Raman spectroscopy, UV-visible spectroscopy, transmission electron microscopy (TEM), electron diffraction (ED), and an Energy dispersive X-ray spectroscopy (EDS). The effects of the reaction temperature, mole ratio of SO(4)(2-) to Ti(4+), and the calcinations temperature on the particle size and crystal phase were investigated. Depending on the acidity, the hydrolysis temperature, and the calcination temperature, rhombic anatase nanocrystals sizes in the range of 10 nm to 50 nm were obtained. In the additive of sulfuric acid, Raman spectra and electron diffraction confirmed that the nanoparticles are composed of anatase TiO(2). No other titania phases, such as rutile or brookite, were detected.
开发了一种新的方法，通过在 0-90°C 的硫酸水溶液中水解四氯化钛来合成均匀的锐钛矿纳米二氧化钛。通过拉曼光谱、紫外可见光谱、透射电子显微镜（TEM）、电子衍射（ED）和能谱（EDS）对样品进行了表征。考察了反应温度、SO(4)(2-)与 Ti(4+)的摩尔比以及煅烧温度对粒径和晶相的影响。根据酸度、水解温度和煅烧温度的不同，可以得到 10nm 到 50nm 范围内的菱形锐钛矿纳米晶。在硫酸添加剂中，拉曼光谱和电子衍射证实纳米颗粒由锐钛矿 TiO(2)组成。未检测到其他二氧化钛相，如金红石或板钛矿。
