能源化学(英文) ›› 2017, Vol. 26 ›› Issue (5): 902-908.DOI: 10.1016/j.jechem.2017.07.007

• ARTICLES • 上一篇    下一篇

A thiophene-containing covalent triazine-based framework with ultramicropore for CO2 capture

Keke Wanga, Yuanzhe Tanga, Qin Jianga, Youshi Lana, Hongliang Huanga,b, Dahuan Liua, Chongli Zhonga,b,c   

  1. a State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    b State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    c Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2017-05-09 修回日期:2017-07-07 出版日期:2017-09-15 发布日期:2017-11-10
  • 通讯作者: Hongliang Huang,E-mail addresses:huanghl@mail.buct.edu.cn;Chongli Zhong,E-mail addresses:zhongcl@mail.buct.edu.cn
  • 基金资助:

    This work was supported by the National Key R&D Program of China (2016YFB0600901) and the Natural Science Foundation of China (grant nos. 21536001 and 21606007).

A thiophene-containing covalent triazine-based framework with ultramicropore for CO2 capture

Keke Wanga, Yuanzhe Tanga, Qin Jianga, Youshi Lana, Hongliang Huanga,b, Dahuan Liua, Chongli Zhonga,b,c   

  1. a State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    b State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    c Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2017-05-09 Revised:2017-07-07 Online:2017-09-15 Published:2017-11-10
  • Contact: Hongliang Huang,E-mail addresses:huanghl@mail.buct.edu.cn;Chongli Zhong,E-mail addresses:zhongcl@mail.buct.edu.cn
  • Supported by:

    This work was supported by the National Key R&D Program of China (2016YFB0600901) and the Natural Science Foundation of China (grant nos. 21536001 and 21606007).

摘要: In this work, a 2D covalent triazine-based framework was prepared by using 1,3-dicyanobenzo[c]thiophene (DCBT) as monomer to effectively capture CO2. The resulting CTF-DCBT was characterized by FT-IR, XPS, PXRD, elemental analysis, SEM, TEM, and N2 adsorption-desorption. The results indicate that CTF-DCBT is partially crystalline and has ultramicropore (6.5 Å) as well as high heteroatom contents (11.24 wt% and 12.61 wt% for N and S, respectively). In addition, the BET surface area and total pore volume of CTF-DCBT are 500 m2/g and 0.26 cm3/g, respectively. CTF-DCBT possesses excellent thermal stability (450℃) and chemical stability towards boiling water, 4 M HCl, and 1 M NaOH. The CO2 adsorption capacity of CTF-DCBT is 37.8 cm3/g at 1 bar and 25℃. After six adsorption-desorption cycles, there is no obvious loss of CO2 uptake observed. Due to the ultramicropore and high heteroatom contents, CTF-DCBT has high isosteric heats of adsorption for CO2 and high selectivities of CO2 over N2 and CH4. At 25℃, the CO2/N2 and CO2/CH4 selectivities are 112.5 and 10.3, respectively, which are higher than those of most POFs. Breakthrough curves indicate that CTF-DCBT could effectively separate CO2/N2 and CO2/CH4 mixtures.

关键词: Covalent triazine-based framework, Ultramicropore, Adsorption, Carbon dioxide

Abstract: In this work, a 2D covalent triazine-based framework was prepared by using 1,3-dicyanobenzo[c]thiophene (DCBT) as monomer to effectively capture CO2. The resulting CTF-DCBT was characterized by FT-IR, XPS, PXRD, elemental analysis, SEM, TEM, and N2 adsorption-desorption. The results indicate that CTF-DCBT is partially crystalline and has ultramicropore (6.5 Å) as well as high heteroatom contents (11.24 wt% and 12.61 wt% for N and S, respectively). In addition, the BET surface area and total pore volume of CTF-DCBT are 500 m2/g and 0.26 cm3/g, respectively. CTF-DCBT possesses excellent thermal stability (450℃) and chemical stability towards boiling water, 4 M HCl, and 1 M NaOH. The CO2 adsorption capacity of CTF-DCBT is 37.8 cm3/g at 1 bar and 25℃. After six adsorption-desorption cycles, there is no obvious loss of CO2 uptake observed. Due to the ultramicropore and high heteroatom contents, CTF-DCBT has high isosteric heats of adsorption for CO2 and high selectivities of CO2 over N2 and CH4. At 25℃, the CO2/N2 and CO2/CH4 selectivities are 112.5 and 10.3, respectively, which are higher than those of most POFs. Breakthrough curves indicate that CTF-DCBT could effectively separate CO2/N2 and CO2/CH4 mixtures.

Key words: Covalent triazine-based framework, Ultramicropore, Adsorption, Carbon dioxide