TY - JOUR
T1 - Continuous Flow Composite Membrane Catalysts for Efficient Decomposition of Chemical Warfare Agent Simulants
AU - Seo, Jin Young
AU - Cho, Kie Yong
AU - Lee, Jung Hyun
AU - Lee, Min Wook
AU - Baek, Kyung Youl
N1 - Funding Information:
This work was supported by the R&D Convergence Program of Ministry of Science, ICT and Future Planning and the National Research Council of Science & Technology (no. CRC-14-1-KRICT), National Research Council of Science & Technology (NST) grant by the Korea Government (MSIP) (No. CMP-16-04-KITECH) and partially supported by the Korea Institute of Science and Technology (KIST) Future R&D program (#2E30710).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/7/22
Y1 - 2020/7/22
N2 - Continuous and safe decomposition of chemical warfare agents (CWAs) is a critical requirement to protect both soldiers and citizens and to eliminate the stockpiles after the cold war. The Zr-based metal-organic framework (Zr-MOF) has been known as the most effective catalyst for decomposing CWAs, especially the most fatal nerve agents, however, its low processability due to the powder form limits its expansion to actual military applications. To this end, the composite membrane catalysts (CMCs) comprising the Zr-MOF (UiO-66 catalyst) and nylon 6 nanofiber (porous supporter) are developed by the simple integration of electrospray and electrospinning, resulting in selective immobilization of UiO-66 on the surface of the nylon 6 nanofibers. These strategical benefits of CMCs gave super catalytic durability including recyclability over five times without decreasing the catalytic activity for the decomposition of methyl paraoxon (MPO), a simulant of the nerve agent, in the presence of N-ethylmorpholine (N-EM), which was not achieved in the original particulate UiO-66. Because of the excellent physical and chemical stabilities of CMCs, the CMC with 56 wt % of UiO-66 (CMC56) decomposed 198 g of MPO within an hour in the continuous flow system with a flow rate of 21.6 mL h-1. This study highlights the important strategies in designing the feasible membrane-type catalysts with superior catalytic activity and robust durability for decomposing CWAs in the continuous flow system.
AB - Continuous and safe decomposition of chemical warfare agents (CWAs) is a critical requirement to protect both soldiers and citizens and to eliminate the stockpiles after the cold war. The Zr-based metal-organic framework (Zr-MOF) has been known as the most effective catalyst for decomposing CWAs, especially the most fatal nerve agents, however, its low processability due to the powder form limits its expansion to actual military applications. To this end, the composite membrane catalysts (CMCs) comprising the Zr-MOF (UiO-66 catalyst) and nylon 6 nanofiber (porous supporter) are developed by the simple integration of electrospray and electrospinning, resulting in selective immobilization of UiO-66 on the surface of the nylon 6 nanofibers. These strategical benefits of CMCs gave super catalytic durability including recyclability over five times without decreasing the catalytic activity for the decomposition of methyl paraoxon (MPO), a simulant of the nerve agent, in the presence of N-ethylmorpholine (N-EM), which was not achieved in the original particulate UiO-66. Because of the excellent physical and chemical stabilities of CMCs, the CMC with 56 wt % of UiO-66 (CMC56) decomposed 198 g of MPO within an hour in the continuous flow system with a flow rate of 21.6 mL h-1. This study highlights the important strategies in designing the feasible membrane-type catalysts with superior catalytic activity and robust durability for decomposing CWAs in the continuous flow system.
KW - chemical warfare agents (CWAs)
KW - composite membrane catalyst
KW - electrospun nanofiber
KW - metal-organic frameworks (MOFs)
KW - porous composite
UR - http://www.scopus.com/inward/record.url?scp=85088491445&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c08276
DO - 10.1021/acsami.0c08276
M3 - Article
C2 - 32589390
AN - SCOPUS:85088491445
VL - 12
SP - 32778
EP - 32787
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 29
ER -