摘要
以氯化铝为铝源，十六烷基溴化铵（CTAB）为模板剂，在尿素的调节作用下采用溶胶一凝胶法合成介孔Al2O3，并采用X射线粉末衍射，N2吸附-脱附，透射电子显微镜（TEM）等测试手段进行了表征，研究了其对Pb^2＋的吸附性能。结果表明，合成了具有蠕虫状的介孔Al2O3。介孔Al2O3对Pb^2＋的吸附率和吸附量随着时间的延长而增大，90min基本达到吸附平衡；在低pH范围，吸附率随着pH值的增大而增大，在pH约为5．0—6．0时吸附率最大；介孔Al2O3对Pb^2＋的吸附过程是吸热过程；介孔Al2O3对Pb^2＋的吸附符合Lagergren二级速率方程。
Mesoporous alumina was prepared by the sol-gel method using cetyltrimethyl ammonium bromide （CTAB）as template a- gent, aluminium chloride as aluminum source and urea as regulator. The as prepared sample was characterized by X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR）, transmission electron microscopy （TEM）and N2 physical adsorption. Also,the adsorption property of the sample was investigated using Pb^2＋ as model compound. The results show that the mesoporous alumina with worm-like was successfully prepared. The adsorption date and adsorption amount to Pb2^＋ increased with the increase of time and the equilibrium has been reached after 90 min. The adsorption date increased with the increase of the pH value in low pH range and the maximum adsorption rate was reached when the pH is about 5.0 - 6. 0. The adsorption process of mesoporous alumina to Pb2＋ is endothermic process. At the same time, the process can be described as Lagergren secondary rate equation.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2013年第11期1580-1584,共5页
Chemical Research and Application
关键词
介孔氧化铝
合成
铅离子
吸附性能
mesoporous alumina
synthesis
Pb2＋
adsorption property
