桥连双亚胺介孔材料对Cr(Ⅵ)的吸附性能*

doi:10.11896/j.issn.1005-023X.2017.019.022

《材料导报》期刊社

2017, Vol. 31

Issue (19): 162-167 https://doi.org/10.11896/j.issn.1005-023X.2017.019.022

吸附分离材料

桥连双亚胺介孔材料对Cr(Ⅵ)的吸附性能^*

谢慧琳¹, 胡文斌^1,2, 龙湘南¹, 贾振宇¹, 刘其海¹, 周新华¹

1 仲恺农业工程学院化学化工学院,广州 510225;
2 中山大学惠州研究院,惠州 516081

Adsorption Properties of Double Imine Bridged Mesoporous Silica to Chromium(Ⅵ)

XIE Huilin¹, HU Wenbin^1,2, LONG Xiangnan¹, JIA Zhenyu¹, LIU Qihai¹, ZHOU Xinhua¹

1 College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225;
2 Huizhou Research Institute of Sun Yat-sen University, Huizhou 516081

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摘要以CTAB/PAANa为混合模板剂,正硅酸乙酯为硅源,自制双亚胺基桥连硅烷偶联剂为改性剂,采用共缩聚法制备了双亚胺桥连介孔硅材料PMOS。利用FTIR、XRD、N₂吸附-脱附、固体核磁和TEM对PMOS材料的结构和形貌进行了表征,将其应用于对Cr(Ⅵ)的吸附,并系统考察了pH值、吸附剂用量和吸附时间对PMOS吸附Cr(Ⅵ)的影响,且重点探究了PMOS对Cr(Ⅵ)的吸附行为。结果表明,PMOS具有高度有序的介孔结构,其对Cr(Ⅵ)的最佳吸附条件为:pH=6,初始浓度为200 mg/L,吸附时间为8 h。PMOS对Cr(Ⅵ)的吸附遵循Langmuir模型,在45 ℃时,其对Cr(Ⅵ)的饱和吸附量为428.61 mg/g。此外,PMOS对Cr(Ⅵ)的吸附行为可用准二级动力学模型来描述,且PMOS与Cr(Ⅵ)之间的作用力主要为静电作用力和配位作用力。

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关键词: 介孔硅双亚胺六价铬离子吸附

Abstract: The diimine bridged mesoporous silica (PMOS) was synthesized by copolycondensation method with CTAB/PAANa as mixed template, tetraethyl orthosilicate as silicon source and homemade silane coupling agent as modifier. The structure and morphology of PMOS materials were characterized by FTIR, XRD, BET, solid-state nuclear magnetic and TEM. The effects of pH value, mass rations of adsorbent and absorption time on adsorption for Cr(Ⅵ) were discussed. Besides, the adsorption behavior of PMOS for Cr(Ⅵ) was mainly investigated. The results showed that PMOS was highly ordered mesoporous structure. While pH=6, the concentration of initial solution was 200 mg/L, adsorption time was 8 h, the PMOS showed excellent adsorption for Cr(Ⅵ). The adsorption could be described by Langmuir model and pseudo-second order kinetics model. When the temperature was 45 ℃, the sa-turated adsorption for Cr(Ⅵ) was 428.61 mg/g. The force between PMOS and Cr(Ⅵ) is mainly electrostatic force and coordination force.

Key words: mesoporous silica double imine chromium(Ⅵ) ion adsorption

出版日期: 2017-10-10 发布日期: 2018-05-07

ZTFLH:

O647.3

基金资助: *国家自然科学基金(21476272;21376280;21546003);广东省科技厅项目(2015A040404044);广东省自然科学基金(2015A030313595; 2015A030313599)

作者简介: 谢慧琳:女,1991年生,硕士研究生,研究方向为功能高分子材料胡文斌:通讯作者,男,1963年生,博士,教授,主要研究方向为功能高分子材料、纳米材料等 E-mail:wbhu2000@163.com

引用本文:

谢慧琳, 胡文斌, 龙湘南, 贾振宇, 刘其海, 周新华. 桥连双亚胺介孔材料对Cr(Ⅵ)的吸附性能^*[J]. 《材料导报》期刊社, 2017, 31(19): 162-167.
XIE Huilin, HU Wenbin, LONG Xiangnan, JIA Zhenyu, LIU Qihai, ZHOU Xinhua. Adsorption Properties of Double Imine Bridged Mesoporous Silica to Chromium(Ⅵ). Materials Reports, 2017, 31(19): 162-167.

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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.019.022 或 http://www.mater-rep.com/CN/Y2017/V31/I19/162

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