阳离子介孔SiO2的制备、表征及其对水中HPAM的吸附性能

石油炼制与化工 ›› 2013, Vol. 44 ›› Issue (5): 38-42.

阳离子介孔SiO2的制备、表征及其对水中HPAM的吸附性能

王庆¹,秦晓梁²,周朝昕¹

1. 中国地质大学材料与化学学院
2. 兰州大学生命科学学院

收稿日期:2012-09-17 修回日期:2012-11-28 出版日期:2013-05-12 发布日期:2013-06-05
通讯作者: 周朝昕 E-mail:zhaoxinzhou@cug.edu.cn

PREPARATION AND CHARACTERIZATION OF CATIONIC MESOPOROUS SiO2 AND ITS ADSORPTION PERFORMANCE OF HPAM FROM WATER

Received:2012-09-17 Revised:2012-11-28 Online:2013-05-12 Published:2013-06-05

摘要/Abstract

摘要： 以三嵌段共聚物聚环氧乙烷-聚环氧丙烷-聚环氧乙烷为模板合成了介孔SiO2，并用γ-氨丙基三乙氧基硅烷（APTES）对其进行表面修饰，得到阳离子介孔SiO2。利用小角XRD和N2吸附-脱附分析了其孔隙结构、比表面积和孔径大小，用透射电子显微镜（TEM）观察了其孔形状及孔的有序度，用傅里叶变换红外光谱（FT-IR）分析了其结构和表面官能团，并研究了阳离子介孔SiO2对水中大量聚丙烯酰胺（HPAM）的吸附特性。结果表明：介孔SiO2成功地实现了阳离子化，呈规则有序的二维六边形结构，BET比表面积为66.3 m2/g，平均孔径为6.94 nm；在吸附时间为120 min、吸附温度为50 ℃、阳离子介孔SiO2与HPAM水溶液的质量比为4: 1、溶液初始pH值为6.5时，阳离子介孔SiO2对水中HPAM的吸附量达到1 340 mg/g。

Abstract: The mesoporous SiO2 was synthesized by template P123 and modified with γ-aminopropyl triethoxysilane (APTES). The pore structures and degree of order of cationic mesoporous SiO2 were characterized by low-angle X-ray Diffraction (XRD), nitrogen adsorption-desorption (BET) and transmission electron microscopy (TEM). The functional group was analyzed with Fourier infrared spectrum (FT-IR). The adsorption of HPAM on cationic mesoporous SiO2 was studied. The results show that the cationic mesoporous SiO2 is successfully prepared and possesses ordered hexagonal structure. The BET surface area and pore size is 66.3m2.g-1 and 6.9nm, respectively. The optimum adsorption conditions for the solution with initial pH 6.5 are the adsorption time of 120min, 50℃, solid-liquid ratio of 4:1. Under these conditions, the adsorption capacity is up to 1340mg/g.

王庆秦晓梁周朝昕. 阳离子介孔SiO2的制备、表征及其对水中HPAM的吸附性能[J]. 石油炼制与化工, 2013, 44(5): 38-42.