改性MCM-41分子筛的合成与亚甲基蓝吸附性能

doi:10.11962/1006-4990.2019-0366

无机盐工业 ›› 2020, Vol. 52 ›› Issue (5): 90-93.doi: 10.11962/1006-4990.2019-0366

• 催化材料 • 上一篇

改性MCM-41分子筛的合成与亚甲基蓝吸附性能

种延竹^1,³,张爱文^1,²

1.鄂尔多斯职业学院化学工程系,内蒙古鄂尔多斯 017000;
2.内蒙古大学;
3.山西大学

收稿日期:2019-11-10 出版日期:2020-05-10 发布日期:2020-05-21
作者简介:种延竹（1985— ）,女,硕士,讲师,主要研究方向为职业教育与催化;E-mail：18876512000@163.com。

Ressearch on preparation of modified amino-functionalized MCM-41 molecular sieve and adsorption capability of methylene blue

Chong Yanzhu^1,³,Zhang Aiwen^1,²

1.Department of Chemical Engineering,Ordos Vocational College,Ordos 017000,China;
2.Inner Mongolia University;
3.Shanxi University

Received:2019-11-10 Online:2020-05-10 Published:2020-05-21

摘要/Abstract

摘要：

选用TEOS（正硅酸乙酯）做为硅源,CTAB（十六烷基三甲基溴化铵）做为表面活性剂,在碱性条件下水热合成MCM-41。实验采用3-氨丙基三甲基硅烷对MCM-41进行改性,成功得到氨基改性介孔材料NH₂-MCM-41吸附剂,并使用X射线衍射（XRD）对其做了表征。考察了各种实验条件下,比如温度、吸附剂的量、pH、亚甲基蓝初始浓度等条件下MCM-41和NH₂-MCM-41对水溶液中亚甲基蓝（MB）的吸附能力。MCM-41和氨基改性介孔材料NH₂-MCM-41均为平面六方介孔结构。结果表明,温度和pH是影响MCM-41和NH₂-MCM-41对亚甲基蓝吸附的最主要的因素。随着温度的升高,材料吸附能力增强,而过高或者过低的pH都会降低MCM-41和NH₂-MCM-41对亚甲基蓝的吸附能力。

关键词: MCM-41, NH2-MCM-41, 亚甲基蓝, 平面六方介孔结构

Abstract:

MCM-41 mesoporous molecular sieves was synthesized under basic conditions by using TEOS as silicon source in the presence of CTAB as surfactant.The MCM-41 materials was further modified with 3-aminopropyl trimethylsilane and the amino modified mesoporous material NH₂-MCM-41 absorbent was obtained successfully.Then the NH₂-MCM-41 was characterized by X-ray diffraction（XRD）.The adsorption capability of MCM-41 and NH₂-MCM-41 on methylene blue（MB） in aqueous solution was investigated under various conditions,such as temperature,amount of adsorbent,pH,initial concentration of methylene blue.The structures of MCM-41 and the amino modified mesoporous material NH₂-MCM-41 were both planar hexagonal mesoporous structures.The results showed that the temperature and pH was the crucial importance in determining the adsorption capability of MCM-41 and NH₂-MCM-41.The adsorption capability of the materials will be improved as the the temperature increase.Furthermore,too much lower or higher pH would decrease the adsorption capability of the materials.

Key words: MCM-41, NH₂-MCM-41, methylene blue, planar hexagonal mesoporous structure

中图分类号:

O634.41

种延竹,张爱文. 改性MCM-41分子筛的合成与亚甲基蓝吸附性能[J]. 无机盐工业, 2020, 52(5): 90-93.

Chong Yanzhu,Zhang Aiwen. Ressearch on preparation of modified amino-functionalized MCM-41 molecular sieve and adsorption capability of methylene blue[J]. Inorganic Chemicals Industry, 2020, 52(5): 90-93.

图/表 7

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质量浓度/（mg·L^-1）	吸光度A	质量浓度/（mg·L^-1）	吸光度A
0.5	0.100	4	0.739
1	0.188	8	1.391
2	0.383	10	1.735

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