【摘要】 以稀土盐和钛酸丁酯为原料 ,采用溶胶 凝胶法制备了掺杂稀土光催化剂RE/TiO2 (RE =La ,Ce ,Er,Pr,Gd ,Nd ,Sm) ,并用XRD ,DRS和IR等手段对RE/TiO2 进行了表征 ;以NO-2 为目标降解物 ,考察了其光催化氧化活性 .结果表明 ,适量RE的掺入 ,可有效扩展TiO2 的光谱响应范围 ,有利于NO-2 的吸附 ,使光催化活性均有不同程度的提高 .其中掺杂Gd样品的光催化活性最高 .掺杂量是影响光催化活性的重要因素 ,一般最佳掺杂量为w(RE) ≈0 5 % .更多还原

【Abstract】 RE/TiO 2 photocatalysts were prepared by using sol gel method with rare earth (RE=La,Ce,Er,Pr,Gd,Nd,Sm) salts and titanium tetrabutoxide as precursors, and were characterized by XRD,IR,UV Vis diffuse reflection techniques. The photocatalytic activity of the catalysts was tested with nitrite as objective decomposition substance. As a result, doping suitable content of rare earth elements can efficiently expand the range of light absorbed by the catalysts. At the same time, the doping can be beneficial to NO - 2 adsorption over the catalysts. Doping RE in TiO 2 can, more or less, enhance the photocatalytic activity. Gd/TiO 2 shows the highest catalytic activity among all the RE/TiO 2 samples concerned. The doped RE content is an important factor for the photocatalytic activity; the optimum RE content is about 0 5%.更多还原