物理化学学报 >> 2014, Vol. 30 >> Issue (4): 789-796.doi: 10.3866/PKU.WHXB201402123

材料物理化学 上一篇    

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

姚蔓莉, 董艳艳, 谢菁, 贾爱平, 谢冠群, 胡庚申, 罗孟飞   

  1. 浙江师范大学物理化学研究所, 先进催化剂材料教育部重点实验室, 浙江金华321004
  • 收稿日期:2013-12-30 修回日期:2014-02-01 发布日期:2014-03-31
  • 通讯作者: 胡庚申 E-mail:gshu@zjnu.edu.cn
  • 基金资助:

    国家自然科学基金(21203167)资助项目

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

YAO Man-Li, DONG Yan-Yan, XIE Jing, JIA Ai-Ping, XIE Guan-Qun, HU Geng-Shen, LUO Meng-Fei   

  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:2013-12-30 Revised:2014-02-01 Published:2014-03-31
  • Contact: HU Geng-Shen E-mail:gshu@zjnu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21203167).

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: 介孔纳米管氧化硅, 聚乙烯亚胺, 吸附, CO2捕捉

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: Mesoporoussilica nanotube, Polyethylenimine, Adsorption, CO2 capture

MSC2000: 

  • O643