Graphene Oxide Nanosheets Based Novel Facilitated Transport Membranes for Efficient CO2 Capture

详细信息    查看全文

• 作者：Guanying Dong ; Yatao Zhang ; Jingwei Hou ; Jiangnan Shen ; Vicki Chen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：May 11, 2016
• 年：2016
• 卷：55
• 期：18
• 页码：5403-5414
• 全文大小：741K
• 年卷期：0
• ISSN：1520-5045

文摘

A novel fixed carrier composite membrane was prepared via interfacial polymerization by using graphene oxide nanosheets (GO), hyperbranched polyethylenimine (HPEI), and trimesoyl chloride (TMC) coating on a polysulfone membrane. The interfacial polymerization was confirmed with SEM, TEM, ATR-FTIR, XPS, DSC, and water contact angle. Further gas separation tests with CO₂/N₂ (10:90 v:v) mixed gas confirmed that the addition of GO could significantly improve the CO₂ permeance and CO₂/N₂ selectivity. The highest CO₂ permeance in this work was 9.7 GPU, while the selectivity was over 80. A further gas separation test under different feed gas humidity confirmed the facilitated transport was the main mechanism of gas separation through the membrane, while the addition of GO into the membrane exhibited a synergistic effect with the gas carriers: the surface defects acted as molecule sieves, and the interlayer fixed flow channels ensured a high water content microenvironment to improve the reactivity between CO₂ and amino based carriers. Besides, superior stability of the composite membrane was also testified.