La^(3+),Al^(3+)共掺杂纳米ZnO光催化降解活性艳蓝X-BR研究(英文)  

Photocatalytic Degradation of Reactive Brilliant Blue X-BR with La^(3+),Al^(3+) Co-doped ZnO Nano-particles

作　　者：周银[1,2] 王宇[1] 卢士香[1] 徐文国[1] 苏苏[1] 

机构地区：[1]北京理工大学理学院,北京100081 [2]成都市公安消防支队司令部,成都610000

出　　处：《人工晶体学报》2009年第4期998-1003,1007,共7页Journal of Synthetic Crystals

基　　金：supported by the 111 Project B07012 of China

摘　　要：采用溶胶-凝胶法制备了不掺杂和掺杂铝离子、镧离子以及两种离子共掺杂的ZnO,并用X射线衍射(XRD),高分辨透射电镜(HRTEM),紫外-可见(UV-Vis)吸收光谱对其进行了表征。用紫外灯作为光源,一定浓度的活性艳蓝X-BR溶液为光催化反应模型污染物,研究了各种离子掺杂ZnO的光催化性能,考察了掺杂量对降解率的影响。结果表明,镧离子和铝离子掺杂浓度为2 at%和3 at%的共搀杂ZnO的光催化性能最好;在室温下,加入催化剂浓度为0.1 g/L,降解时间为45 min时,对活性艳蓝X-BR溶液的降解率达到96.63%。Nanoparticles of ZnO doped with La3 ＋ , A13 ＋ , co-doped with La3 ＋ and Al3＋ were prepared by the sol-gel method. The samples were characterized by X-ray diffraction （XRD）, high resolution transmission electron microscope （HRTEM） and UV-Vis absorption spectroscopy. The photocatalytic performance of different ZnO particles was studied using ultraviolet lamp as illumination device and reactive brilliant blue X-BR as stimulant pollutant. The highest photoactivity was obtained at optimal concentration （2 at% La3＋ and 3 at% Al3＋ ）. The degradation rate of reactive brilliant blue X-BR could get to 96.63% in 45 min at room temperature under the concentration of catalyst was 0. 1g/L.

关 键 词：溶胶-凝胶 纳米氧化锌 光催化降解 镧铝共掺杂 

分 类 号：O78[理学—晶体学]