氨基功能化短孔道有序介孔材料H_2N-Zr-Ce-SBA-15的合成及吸附性能  

Synthesis and Adsorption Properties of Amino-Functionalized H_2N-Zr-Ce-SBA-15 Mesoporous Materials with Short Mesochannels

作　　者：袁金芳[1,2] 李健生[1] 顾娟[1] 王放[1] 孙秀云[1] 韩卫清[1] 王连军[1] 

机构地区：[1]南京理工大学环境科学与工程系,南京210094 [2]河南大学精细化学与工程研究所,河南开封475001

出　　处：《物理化学学报》2010年第6期1711-1716,共6页Acta Physico-Chimica Sinica

基　　金：高等学校科技创新工程重大项目培育资金项目(708049);江苏省自然科学基金(BK2009392);南京理工大学自主科研专项计划项目(2010ZDJH03)资助~~

摘　　要：以pluronic(P123)为模板剂,正硅酸乙酯(TEOS)为硅源,氯化氧锆和硝酸亚铈为无机前驱盐,N-(2-氨乙基)-3-氨丙基三甲氧基硅烷(AAPTS)为硅烷化试剂,采用后接枝法合成了氨基功能化六方板状短孔道有序介孔材料H2N-Zr-Ce-SBA-15(H2N-ZCS).采用小角X射线衍射(LXRD)、傅里叶变换红外(FTIR)光谱、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、热重分析、N2吸附/脱附等手段对H2N-ZCS进行了表征.结果表明AAPTS成功地嫁接到有序介孔材料上,H2N-ZCS仍保持了类似于传统SBA-15高度有序的二维六方相介孔结构,且孔道方向垂直于该六方板面.对阴离子染料酸性品红吸附实验表明,H2N-ZCS比H2N-SBA-15具有较强的吸附能力.这种功能化短孔道、大径轴比的六方板状介孔材料在吸附、分离及催化等领域中能更有效地促进分子的扩散传递.Amino-functionalized H2N-Zr-Ce-SBA-15（H2N-ZCS） mesoporous materials with unique hexagonal platelet morphologies and short channels were synthesized by a post-grafting method using [1-（2-amino-ethyl）-3-aminopropyl] trimethoxysilane（AAPTS） and tetraethyl orthosilicate（TEOS） as a silica source,zirconyl chloride and cerous nitrate as precursors,and pluronic P123 triblock copolymer as a structure directing agent.The as-synthesized materials were characterized by low-angle X-ray diffraction（LXRD）,transmission electron microscopy（TEM）,scanning electron microscopy（SEM）,Fourier-transform infrared spectroscopy（FT-IR）,thermogravimetry（TG）,and N2 adsorption/ desorption isotherms.Characterization revealed that the functionalized H2N-ZCS mesoporous materials have unique hexagonal platelet morphologies with short channels and they possess a highly ordered two-dimensional hexagonal mesoporous structure similar to conventional SBA-15.The uptake of anionic dye onto the organic functionalized H2N-ZCS and H2N-SBA-15 were compared.The results demonstrate that H2N-ZCS materials have higher adsorption rates and adsorption capacities compared with H2N-SBA-15.The resultant H2N-ZCS materials with short channels are superior to conventional SBA-15 in terms of fiber morphology facilitating molecular diffusion when used in adsorption,separation,and catalytic processes.

关 键 词：吸附 氨基功能化H2N-Zr-Ce-SBA-15 介孔材料 后接枝法 合成 

分 类 号：O611.3[理学—无机化学]