Ji Rongchang, Lu Xiaona, Zhang Jinlong
Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China.
J Nanosci Nanotechnol. 2009 Sep;9(9):5134-40. doi: 10.1166/jnn.2009.1209.
Iron (III) doped titanium dioxide film with high visible light photocatalytic activity was prepared using the modified sol-gel method, in which, none of organic solvent was used and all the films were prepared at low temperature. The as prepared films were characterized by wide angle X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (DRS), electron paramagnetic resonance (EPR) and atomic force microscope (AFM). Characteristic results clearly show that the architecture of Fe3+ doped TiO2 is composed of mixed-phase crystal textures of anatase and brookite, and crystal size keeps at approximately 10 nm. After Fe (III) was successfully doped into titania lattice and partly substituted Ti (IV), absorbance of films in visible light displays obvious red shift. The photocatalytic activities of Fe3+ doped TiO2 films show their best efficiency at an optimal atomic ratio of Fe to Ti of 1.2:100. The effect of dopant and preparing conditions on their structure and photocatalytic activities were investigated in detail.
采用改进的溶胶-凝胶法制备了具有高可见光光催化活性的铁（III）掺杂二氧化钛薄膜，该方法不使用任何有机溶剂，且所有薄膜均在低温下制备。通过广角X射线衍射（XRD）、紫外-可见漫反射光谱（DRS）、电子顺磁共振（EPR）和原子力显微镜（AFM）对所制备的薄膜进行了表征。特征结果清楚地表明，Fe3+掺杂TiO2的结构由锐钛矿和板钛矿的混合相晶体结构组成，晶体尺寸保持在约10nm。Fe（III）成功掺杂到二氧化钛晶格中并部分取代Ti（IV）后，薄膜在可见光下的吸光度呈现明显的红移。Fe3+掺杂TiO2薄膜在Fe与Ti的最佳原子比为1.2:100时表现出最佳的光催化活性。详细研究了掺杂剂和制备条件对其结构和光催化活性的影响。
