巯基化多孔二氧化硅的制备及其亚甲基蓝吸附性能  

Preparation of Sulfhydrated Porous Silica and Its Adsorption Property for Methylene Blue

作　　者：周泽楠 戴昆浩 李坤泉 陈慧如 吴文剑 ZHOU Ze-nan;DAI Kun-hao;LI Kun-quan;CHEN Hui-ru;WU Wen-jian(College of Materials Science and Engineering,Dongguan University of Technology,Dongguan 523808,Guangdong,China)

机构地区：[1]东莞理工学院材料科学与工程学院,广东东莞523808

出　　处：《合成材料老化与应用》2024年第4期15-17,107,共4页Synthetic Materials Aging and Application

基　　金：东莞理工学院-广东生益科技股份有限公司大学生社会实践教学基地项目(202302004)。

摘　　要：以氨水为催化剂,正硅酸四乙酯(TEOS)为前驱体,十六烷基三甲基溴化铵(CTAB)为致孔剂,采用溶胶-凝胶法制备多孔二氧化硅,并使用γ-巯丙基三甲氧基硅烷(KH590)对其进行改性,对改性前后的多孔二氧化硅进行表征和亚甲基蓝吸附性能测试。结果表明,所制备的多孔二氧化硅粒径均在40~80 nm,孔径在2.25~4.39 nm之间,具有较大的比表面积,最大为379.4m^(2)/g,且分散性良好。红外光谱分析表明KH590成功对多孔二氧化硅进行了改性,改性后的多孔二氧化硅疏水性能提高。相较于未改性的多孔二氧化硅,KH590改性后的多孔二氧化硅对亚甲基蓝的吸附性能更好。Porous silica was prepared by sol-gel method using ammonia as catalyst,tetraethyl orthosilicate(TEOS)as precursor and cetyltrimethyl ammonium bromide(CTAB)as pore agent.Then the porous silica was modified withγ-mercaptopropyl trimethoxy silane(KH590).The porous silica before and after modification was characterized,and the adsorption properties of methylene blue were tested.The results showed that the prepared porous silica possessed good dispersion and had a particle size of 40~80 nm with pore size of 2.25~4.39 nm and specific surface area of 379.4 m²/g.Fourier transform infrared spectroscopy analysis indicated that the KH590 had successfully modified onto the surface of the porous silica,and the modified porous silica showed improved hydrophobic property.Compared with the unmodified porous silica,the modified porous silica with KH590 can adsorb the methylene blue more effectively.

关 键 词：溶胶-凝胶 正硅酸四乙酯 多孔二氧化硅 硅烷偶联剂 亚甲基蓝吸附 

分 类 号：TQ630.7[化学工程—精细化工] TB34[一般工业技术—材料科学与工程]