物理化学学报 >> 2010, Vol. 26 >> Issue (06): 1711-1716.doi: 10.3866/PKU.WHXB20100624

材料物理化学 上一篇    下一篇

氨基功能化短孔道有序介孔材料H2N-Zr-Ce-SBA-15的合成及吸附性能

袁金芳, 李健生, 顾娟, 王放, 孙秀云, 韩卫清, 王连军   

  1. 南京理工大学环境科学与工程系, 南京 210094; 河南大学精细化学与工程研究所, 河南 开封 475001
  • 收稿日期:2009-12-30 修回日期:2010-04-08 发布日期:2010-05-28
  • 通讯作者: 王连军 E-mail:lijsh@mail.njust.edu.cn

Synthesis and Adsorption Properties of Amino-Functionalized H2N-Zr-Ce-SBA-15 Mesoporous Materials with Short Mesochannels

YUAN Jin-Fang, LI Jian-Sheng, GU Juan, WANG Fang, SUN Xiu-Yun, HAN Wei-Qing, WANG Lian-Jun   

  1. Department of Environmental Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China; Institute of Fine Chemical and Engineering, Henan University, Kaifeng 475001, Henan Province, P. R. China
  • Received:2009-12-30 Revised:2010-04-08 Published:2010-05-28
  • Contact: WANG Lian-Jun E-mail:lijsh@mail.njust.edu.cn

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.

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

Abstract:

Amino-functionalizedH2N-Zr-Ce-SBA-15 (H2N-ZCS)mesoporousmaterialswith 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.

Key words: Adsorption, Amino-functionalized H2N-Zr-Ce-SBA-15, Mesoporous materials, Post-synthesis-grafting method, Synthesis

MSC2000: 

  • O647