Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China.
J Hazard Mater. 2011 Aug 30;192(2):651-7. doi: 10.1016/j.jhazmat.2011.05.066. Epub 2011 Jun 1.
Titanium oxide with different ratios of anatase to rutile has been prepared by the microemulsion-mediated solvothermal method. The resulting samples were investigated by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, UV-vis diffuse reflectance spectra, transmission electron microscopy and Brunauer-Emmett-Teller analysis. The contents of anatase and rutile in the TiO(2) particles have been successfully controlled by simply adjusting the amount of urea in the aqueous phase of the microemulsion. Both the degradation of Rhodamine B in aqueous solutions and mineralization of TOC revealed that the catalyst containing 47.6% anatase have presented the highest photocatalytic activity. A proposed mechanism is discussed to interpret the evolution of the phases based on the effect of different amount of urea.
通过微乳液介导的溶剂热法制备了具有不同锐钛矿和金红石比例的二氧化钛。通过 X 射线衍射、拉曼光谱、扫描电子显微镜、紫外可见漫反射光谱、透射电子显微镜和 Brunauer-Emmett-Teller 分析对所得样品进行了研究。通过简单调整微乳液水相中的尿素用量，成功地控制了 TiO2 颗粒中锐钛矿和金红石的含量。在水溶液中降解罗丹明 B 和 TOC 的矿化表明，含有 47.6%锐钛矿的催化剂表现出最高的光催化活性。讨论了一种提出的机制，以根据不同量的尿素的影响来解释相的演变。
