[1]吕录萍,丁丹丹,杨春,等.研磨对介孔分子筛SBA-15结构的影响[J].南京师大学报(自然科学版),2008,31(03):71-75.
 Lü Luping,Ding Dandan,Yang Chun.The Influence of Mechanical Grinding on the Structure of Mesoporous Silica SBA-15[J].Journal of Nanjing Normal University(Natural Science Edition),2008,31(03):71-75.
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研磨对介孔分子筛SBA-15结构的影响()
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《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

卷:
第31卷
期数:
2008年03期
页码:
71-75
栏目:
化学
出版日期:
2008-09-30

文章信息/Info

Title:
The Influence of Mechanical Grinding on the Structure of Mesoporous Silica SBA-15
作者:
吕录萍;丁丹丹;杨春;
南京师范大学化学与环境科学学院, 江苏南京210097
Author(s):
Lü LupingDing DandanYang Chun
School of Chemistry and Environmental Science,Nanjing Normal University,Nanjing 210097,China
关键词:
介孔分子筛 SBA-15 研磨 机械性能
Keywords:
m esoporous m ate rials SBA-15 gr ind ing mechan ica l property
分类号:
O643.36
摘要:
考察了研磨对经不同脱模方法得到的SBA-15介孔分子筛的结构的影响.用N2吸附-脱附、XRD、FT-IR、29Si CP MAS NMR等手段对样品的结构进行了表征,发现研磨对SBA-15的孔结构有一定的破坏作用,导致样品的长程有序性降低,表面积、孔容下降,孔径减小.同时,研磨增加了孔壁中的结构缺陷,机械压力使孔壁发生了收缩,壁中的小孔/微孔减少.对不同方法脱模的介孔样品,焙烧脱模样品的机械性能强于乙醇抽提脱模样品,研磨对其结构的影响较小,这是由于焙烧过程有利于孔壁缩合和紧固的缘故.
Abstract:
E ffects o f g rinding on the struc ture o f m esoporous silica SBA-15 syn thesized w ith different temp la te-rem oval m ethods w ere investigated. The samp les w ere characterized byN2 adsorption-desorption, X-ray diffraction ( XRD) , fou rier-transform in frared spectro scopy ( FT-IR), and so lid-sta ted 29 S iCP MAS NMR. It w as found that the g rinding par tia lly destroyed the struc ture of m esoporous silica SBA-15, resu lting in a decrease in long-range order, as we ll as lowe r surface a rea, sm a ller po re vo lum e and d im in ishing pore diam ete r. M eanwh ile, the g rind ing increased the structu re defects in porew a l;l and them echanical pressure a lso caused the shrinkage o f the unit ce ll and the decrease in m icropore vo lum e. For the SBA-15 synthesized using d iffe rent temp la te-rem oval m ethods, the m echan ica l property of the calc ined sam ple is super ior to that of ethanol-extrac ted sam ple; a sm a ller in fluence on the form er w as obse rved upon gr ind ing. Th is is because the ca lcina tion is favorab le to the condensation and com paction o f silica w alls

参考文献/References:

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相似文献/References:

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[2]曹雨诞,杨春.介孔分子筛HMS上碱性基团功能化的条件探索[J].南京师大学报(自然科学版),2001,24(04):80.

备注/Memo

备注/Memo:
基金项目: 国家自然科学基金( 20473037 )、江苏省教育厅自然科学基金( 04K JB150069 )、国家人事部留学人员科技活动( 2005103SB9BH 51)资助项目.
通讯联系人: 杨春, 研究员, 研究方向: 多相催化. E-m ail:yangchun@ n jnu. edu. cn
更新日期/Last Update: 2013-05-05