Behnajady Mohammad A, Eskandarloo Hamed
Faculty of Science, Department of Chemistry, Tabriz Branch, Islamic Azad University, 5157944533, Tabriz, I.R. Iran.
J Nanosci Nanotechnol. 2013 Jan;13(1):548-53. doi: 10.1166/jnn.2013.6859.
In this study, monometallic and bimetallic silver and copper doped TiO2 nanoparticles were prepared by sol-gel method. Structural and morphological characterizations of prepared nanoparticles were performed by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and N2 physisorption techniques. Co-doped TiO2 nanoparticles displayed pure anatase phase with 20-30 nm particle size and a humdrum distribution. The stability of anatase phase was increased with co-doping of silver and copper to TiO2 lattice. In addition, the co-doped TiO2 nanoparticles had a mesoporous structure with slit-shaped pores. The photocatalytic activity of all samples was evaluated in the photocatalytic removal of C.I. Acid Orange 7. Co-doped TiO2 nanoparticles by Ag and Cu were shown to have highest activity as compared with the Ag/TiO2, Cu/TiO2 and pure TiO2 nanoparticles. The best performance of co-doped TiO2 nanoparticles was observed for a sample calcined under 550 degrees C, containing optimum molar contents of silver (0.08 mol%) and copper (0.01 mol%) dopant ions.
在本研究中，采用溶胶 - 凝胶法制备了单金属和双金属银和铜掺杂的二氧化钛纳米颗粒。通过X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、能量色散X射线光谱（EDX）和N2物理吸附技术对制备的纳米颗粒进行了结构和形态表征。共掺杂的二氧化钛纳米颗粒呈现出纯锐钛矿相，粒径为20 - 30 nm，分布均匀。银和铜共掺杂到二氧化钛晶格中提高了锐钛矿相的稳定性。此外，共掺杂的二氧化钛纳米颗粒具有狭缝状孔的介孔结构。在光催化去除酸性橙7的过程中评估了所有样品的光催化活性。与Ag/TiO2、Cu/TiO2和纯TiO2纳米颗粒相比，Ag和Cu共掺杂的TiO2纳米颗粒显示出最高的活性。对于在550℃下煅烧的样品，观察到共掺杂的TiO2纳米颗粒具有最佳性能，该样品含有最佳摩尔含量的银（0.08 mol%）和铜（0.01 mol%）掺杂离子。
