Department of Chemistry, Sharif University of Technology, Tehran, Iran.
J Hazard Mater. 2009 Dec 30;172(2-3):1573-8. doi: 10.1016/j.jhazmat.2009.08.029. Epub 2009 Aug 13.
TiO(2) and transition metal (Cr, Mn, Fe, Co, Ni, Cu, and Zn) doped TiO(2) nanoparticles were synthesized by the sol-gel method using 2-hydroxylethylammonium formate as an ionic liquid. All the prepared samples were calcined at 500 degrees C and characterized by X-ray diffraction (XRD), BET surface area determination, energy dispersive X-ray (EDX) analysis, diffuse reflectance spectroscopy (DRS), and Fourier transformed infrared (FT-IR) techniques. The studies revealed that transition metal (TM) doped nanoparticles have smaller crystalline size and higher surface area than pure TiO(2). Dopant ions in the TiO(2) structure caused significant absorption shift into the visible region. The results of photodegradation of Acid Blue92 (AB92) in aqueous medium under UV light showed that photocatalytic activity of TiO(2) nanoparticles was significantly enhanced by the presence of some transition metal ions. Chemical Oxygen Demand (COD) of dye solutions were done at regular intervals gave a good idea about mineralization of dye.
TiO(2) 和过渡金属（Cr、Mn、Fe、Co、Ni、Cu 和 Zn）掺杂的 TiO(2) 纳米粒子通过溶胶-凝胶法使用 2-羟乙基铵甲酸盐作为离子液体合成。所有制备的样品都在 500°C 下煅烧，并通过 X 射线衍射（XRD）、BET 表面积测定、能量色散 X 射线（EDX）分析、漫反射光谱（DRS）和傅里叶变换红外（FT-IR）技术进行了表征。研究表明，过渡金属（TM）掺杂的纳米粒子比纯 TiO(2)具有更小的结晶尺寸和更高的表面积。TiO(2) 结构中的掺杂离子导致吸收显著向可见光区域移动。在紫外光下在水介质中光降解酸性蓝 92（AB92）的结果表明，TiO(2)纳米粒子的光催化活性通过存在一些过渡金属离子得到了显著增强。定期进行染料溶液的化学需氧量（COD）测定，很好地了解了染料的矿化情况。
