聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO<sub>2</sub>吸附应用

引用本文: 姚蔓莉, 董艳艳, 谢菁, 贾爱平, 谢冠群, 胡庚申, 罗孟飞. 聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO₂吸附应用[J]. 物理化学学报, 2014, 30(4): 789-796. doi: 10.3866/PKU.WHXB201402123 shu

Citation: YAO Man-Li, DONG Yan-Yan, XIE Jing, JIA Ai-Ping, XIE Guan-Qun, HU Geng-Shen, LUO Meng-Fei. Preparation of Polyethylenimine-Functionalized Silica Nanotubes and Their Application for CO₂ Adsorption[J]. Acta Physico-Chimica Sinica, 2014, 30(4): 789-796. doi: 10.3866/PKU.WHXB201402123 shu

聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO₂吸附应用

基金项目:
国家自然科学基金（21203167）资助项目

摘要:

以P123为模板，1，2-二（三甲氧基硅基）乙烷（BTME）为硅源合成了介孔氧化硅纳米管（E-SNTs）. 将ESNTs经过聚乙烯亚胺（PEI）修饰后制得吸附剂用于捕捉CO₂. 对吸附剂进行了透射电镜（TEM）、物理吸附、傅里叶变换红外（FTIR）光谱、热重分析（TGA）等表征. E-SNTs-PEI 吸附剂的最佳CO₂吸附温度为75 ℃. 吸附剂的CO₂吸附量随着PEI负载量的增加呈现先增大后减小的趋势，其中50%为最佳负载量，此时吸附剂的吸附量最大为3.32 mmol·g^-1. 相比较SBA-15 基吸附剂，E-SNTs 基吸附剂具有更优异的吸附性能. 在有水汽的存在下，吸附剂E-SNTs-50 的CO₂吸附量达到3.75 mmol·g^-1. 经过四次循环吸脱附实验测试E-SNTs-PEI 吸附剂的稳定性能，结果表明其CO₂吸附量基本不变，该吸附剂表现出较好的稳定性和可再生能力.

关键词:

English

Preparation of Polyethylenimine-Functionalized Silica Nanotubes and Their Application for CO₂ Adsorption

1.
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, P. R. China
Received Date: 30 December 2013
Available Online: 31 March 2014
Fund Project:
国家自然科学基金（21203167）资助项目

Abstract:

Mesoporous ethane-silica nanotubes (E-SNTs) were synthesized using P123 as a template and 1,2-bis(trimethoxysilyl)ethane (BTME) as a silica source. E-SNTs were modified with polyethylenimine (PEI) as sorbents for CO₂ adsorption. These new composite sorbents were characterized by transmission electron microscopy (TEM), nitrogen adsorption/desorption, Fourier transform infrared (FTIR) spectroscopy, and thermal gravimetric analysis (TGA). We found that 75 ℃ is the optimal temperature for CO₂ adsorption. E-SNTs with a 50% (w) PEI loading (E-SNTs-50) exhibited a higher CO₂ adsorption capacity (3.32 mmol·g^-1) than the other materials. The E-SNTs-based sorbents show better CO₂ capture performance than the SBA-15-based sorbents. Additionally, CO₂ uptake was further enhanced to 3.75 mmol·g^-1 in the presence of moisture. Cyclic CO₂ adsorption-desorption test results indicated that the composite sorbents are stable and can be regenerated.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO₂吸附应用

English

Preparation of Polyethylenimine-Functionalized Silica Nanotubes and Their Application for CO₂ Adsorption

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聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO2吸附应用

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

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