摘要
采用共沉淀法合成了n(Zn) /n(Sn) =2的ZnO SnO2 纳米复合氧化物光催化剂 ,并采用X射线衍射 (XRD)、紫外 可见(UV Vis)漫反射吸收光谱、透射电子显微镜 (TEM)和N2 物理吸附等方法对在 5 0 0～ 130 0℃焙烧不同时间制得的ZnO SnO2纳米复合氧化物的物相组成、光吸收性能、晶粒尺寸、颗粒大小、比表面积和孔体积进行了表征 .以对硝基苯胺为模型化合物 ,对ZnO SnO2 复合氧化物的光催化活性进行了评价 ,考察了催化剂焙烧温度和焙烧时间对其催化活性的影响 .结果表明 ,在70 0℃焙烧 2h制得的ZnO SnO2 纳米复合氧化物具有最高的光催化活性 .
ZnO-SnO 2 nanocomposite oxide with Zn/Sn molar ratio of 2 was prepared by co-precipitation method. The sample was calcined at 500～ 1?300 ℃. X-ray diffraction (XRD), UV-Vis diffuse reflectance absorption spectroscopy, transmission electron microscopy (TEM) and N 2 adsorption techniques were employed to characterize the phase composition, optical absorption, crystal and particle size, BET surface area and pore volume of the sample. Application of ZnO-SnO 2 nanocomposite oxide as photocatalyst was practiced by using p-nitroaniline as a model compound. The maximum specific photocatalytic activity was obtained on the ZnO-SnO 2 nanocomposite oxide calcined at 700 ℃ for 2 h.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2004年第12期967-972,共6页
基金
国家杰出青年基金资助项目 (2 0 12 5 3 10 )
关键词
光催化
氧化锌
二氧化锡
纳米复合氧化物
硝基苯胺
降解
photocatalysis, zinc oxide, tin dioxide, nanocomposite oxide, nitroaniline, degradation
