Nguyen Duy-Trinh, Hong Seong-Soo
J Nanosci Nanotechnol. 2016 Feb;16(2):1911-5. doi: 10.1166/jnn.2016.11971.
In this study, TiO2 and metal ion-doped TiO2 nanoparticles were successfully synthesized by solvothermal reaction of titanium butoxide precursor in the presence of oleic acid, oleylamine and vapor water and they were characterized by XRD, Raman, TEM and DRS. We also investigated the photocatalytic activity of these oxides for the decomposition of Rhodamine B. From XRD and Raman results, doping of the metal ion in the crystal lattice did not change the high crystallinity of the TiO2 structure, and all the metal ions were incorporated into the structures of titania as well as replaced titanium ion or located at interstitial site. The absorption band shifted to a higher wavelength on the metal ion-doped TiO2 samples compared to the pure TiO2 sample. The Ce ion- doped TiO2 catalysts showed the higher photocatalytic activity compared to the pure TiO2 and a commercial P-25 catalysts and 1% Ce-doped TiO2 showed the highest photocatalytic activity.
在本研究中，通过钛酸丁酯前驱体在油酸、油胺和水蒸气存在下的溶剂热反应成功合成了TiO₂和金属离子掺杂的TiO₂纳米颗粒，并通过XRD、拉曼光谱、TEM和DRS对其进行了表征。我们还研究了这些氧化物对罗丹明B分解的光催化活性。从XRD和拉曼光谱结果来看，金属离子掺杂到晶格中并没有改变TiO₂结构的高结晶度，并且所有金属离子都被纳入二氧化钛结构中，取代了钛离子或位于间隙位置。与纯TiO₂样品相比，金属离子掺杂的TiO₂样品的吸收带向更高波长移动。与纯TiO₂和商业P-25催化剂相比，Ce离子掺杂的TiO₂催化剂表现出更高的光催化活性，且1% Ce掺杂的TiO₂表现出最高的光催化活性。
