Metal–Organic Framework Adsorbent for Practical Capture of Trace Carbon Dioxide

• Published in: ACS applied materials & interfaces Vol. 12; no. 45; pp. 50534 - 50540
• Main Authors: Park, Jinkyoung, Park, Jeoung Ryul, Choe, Jong Hyeak, Kim, Saemi, Kang, Minjung, Kang, Dong Won, Kim, Jee Yeon, Jeong, Yong Won, Hong, Chang Seop
• Format: Journal Article
• Language: English
• Published: American Chemical Society 11.11.2020
• Subjects: Energy, Environmental, and Catalysis Applications; ultra-microproliferation; PDMS coating; indoor air capture; amine functionalization; metal−organic framework
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.0c16224

Control of indoor CO2 concentration to a safe level is important to human health. Metal–organic-framework-based adsorbents show superior adsorption performance at moderate CO2 concentration compared to other solid adsorbents but suffer from low capacities and high regeneration temperature at indoor CO2 concentrations and poor humidity stability. Herein, we report epn-grafted Mg2(dobpdc) (epn = 1-ethylpropane-1,3-diamine) showing a CO2 capacity of 12.2 wt % at an acceptable concentration of 1000 ppm and a practically low desorption temperature of 70 °C, which surpasses the performance of conventional solid adsorbents under the given conditions. After poly­(dimethylsiloxane) coating, this material reveals a significant adsorption amount (∼10 wt %) in humid conditions (up to 98% relative humidity) with structural durability.