Co^(2+)-Ni^(2+)-Al^(3+)-CH_3(CH_2)_(11)SO_3^--LDHs制备及吸油性能研究

Preparation and crude oil absorption of Co^(2+)-Ni^(2+)-Al^(3+)-CH_3(CH_2)_(11)SO_3^--LDHs material

尿素作为沉淀剂,采用均相沉淀技术制得Co^(2+)-Ni^(2+)-Al^(3+)-LDHs层状材料。以Co^(2+)-Ni^(2+)-Al^(3+)-LDHs作为前驱体,分别与NaCl、十二烷基磺酸钠[CH_3(CH_2)_(11)SO_3^-Na]进行离子交换反应分别制得Co^(2+)-Ni^(2+)-Al^(3+)-CH_3(CH_2)_(11)SO_3^--LDHs新型吸附剂材料,实现了将CH_3(CH_2)_(11)SO_3^-负载到Co^(2+)-Ni^(2+)-Al^(3+)-LDHs层状材料。研究表明Co^(2+)-Ni^(2+)-Al^(3+)-SDS^--LDHs为介孔材料,增强了类水滑石的亲油吸附性能,其比表面积为136.2m^2/g,平均孔径为18.3nm,在相对压强(P/P0)为1.0时,吸附量达到321cm^3/g,具有较好的吸附性能。

Co^2＋-Ni^2＋-Al^3＋-LDHs was prepared by homogeneous precipitation method.Co^2＋-Ni^2＋-Al^3＋-CH3（CH2）11SO3^--LDHs was successfully synthetized through ion exchange reaction with NaCl and dodecyl sulfonic acid（CH3（CH2）11SO3^-）respectively using Co^2＋-Ni^2＋-Al^3＋-LDHs as precursor,which made the CH3（CH2）11SO3^-load to layer spacing of Co^2＋-Ni^2＋-Al^3＋-LDHs.The experimental results showed that Co^2＋-Ni ^2＋-Al 3＋CH3（CH2）11SO3^--LDHs was belonging to mesoporous materials.The results indicated that the dodecyl sulfonic acid（CH3（CH2）11SO3^-）ion insertion product of layer Co^2＋-Ni^2＋-Al^3＋-LDHs enhanced oil adsorption properties.The BET surface area and average pore of the obtained materials were 136.2m^2/g and 18.3nm respectively.The adsorption capacity of Co^2＋-Ni^2＋-Al^3＋CH3（CH2）11SO3^--LDHs at the relative pressure（P/P0）of 1.0can reach 321cm^3/g,which showed a good adsorption performance.