CAJ | 학술논문

本研究采用溶胶-凝胶法,分别以十二烷基肌氨酸钠、氨丙基三甲氧基硅烷(APTMS)和正硅酸乙酯(TEOS)为结构导向剂(SDA)、共结构导向剂(CSDA)和硅源合成了氨基功能化的介孔氧化硅预产物.利用乙醇和乙醇胺混合液对预产物进行萃取后获得氨基功能化介孔氧化硅.利用红外光谱、元素分析、N_2吸-脱附、透射电镜等手段对材料进行了表征.红外光谱结果证明通过萃取方法可较好地去除表面活性剂;N_2吸附结果表明所有样品都具有介孔结构;元素分析和透射电镜结果说明反应陈化温度、pH值等合成条件对材料孔道内表面的氨基含量和材料结构有较大的影响.CO_2吸附实验证明在低陈化温度、相对较低的pH值下合成的材料具有较高的CO_2吸附量.
본연구채용용효-응효법,분별이십이완기기안산납、안병기삼갑양기규완(APTMS)화정규산을지(TEOS)위결구도향제(SDA)、공결구도향제(CSDA)화규원합성료안기공능화적개공양화규예산물.이용을순화을순알혼합액대예산물진행췌취후획득안기공능화개공양화규.이용홍외광보、원소분석、N_2흡-탈부、투사전경등수단대재료진행료표정.홍외광보결과증명통과췌취방법가교호지거제표면활성제;N_2흡부결과표명소유양품도구유개공결구;원소분석화투사전경결과설명반응진화온도、pH치등합성조건대재료공도내표면적안기함량화재료결구유교대적영향.CO_2흡부실험증명재저진화온도、상대교저적pH치하합성적재료구유교고적CO_2흡부량.
Using N-lauroylsarcosine sodium,3-aminopropyhrimethoxysilane and TEOS as structure-directing agent (SDA),co-structure-directing agent (CSDA) and silicon source,respectively,the precursors of amino-functionalized mesoporous silicas were prepared by a sol-gel method.The amino-functionalized mesoporous silicas were obtained via the precursors extracted with a mixture solution of ethanol and ethanol amine.The resulting mesoporous silicas were characterized by the FTIR,N_2 adsorption-desorption,elemental analysis,and TEM techniques.The FHR characterization indicates that the surfactant can be efficiently removed by the solvent extraction.A mesoporous structure is available in the synthesized materials,confirmed by the characterization of N_2 adsorption-desorption.The results from both elemental analysis and TEM characterizations show that the amount of amino groups inside the mesoporous materials is greatly controlled by the aging temperature and pH value of the synthetic solution.The adsorption of CO_2 on the synthesized materials implies that the low aging temperature and relatively low pH value of the synthetic solution would be beneficial to enhance the adsorbed amount of CO_2 on the resulted materials.