Functionalized, carbon nanotube material for the catalytic degradation of organophosphate nerve agents
- 494 Downloads
Recent world events have emphasized the need to develop innovative, functional materials that will safely neutralize chemical warfare (CW) agents in situ to protect military personnel and civilians from dermal exposure. Here, we demonstrate the efficacy of a novel, proof-of-concept design for a Cu-containing catalyst, chemically bonded to a single-wall carbon nanotube (SWCNT) structural support, to effectively degrade an organophosphate simulant. SWCNTs have high tensile strength and are flexible and light-weight, which make them a desirable structural component for unique, fabric-like materials. This study aims to develop a self-decontaminating, carbon nanotube-derived material that can ultimately be incorporated into a wearable fabric or protective material to minimize dermal exposure to organophosphate nerve agents and to prevent accidental exposure during decontamination procedures. Carboxylated SWCNTs were functionalized with a polymer, which contained Cu-chelating bipyridine groups, and their catalytic activity against an organophosphate simulant was measured over time. The catalytically active, functionalized nanomaterial was characterized using X-ray fluorescence and Raman spectroscopy. Assuming zeroth-order reaction kinetics, the hydrolysis rate of the organophosphate simulant, as monitored by UV-vis absorption in the presence of the catalytically active nanomaterial, was 63 times faster than the uncatalyzed hydrolysis rate for a sample containing only carboxylated SWCNTs or a control sample containing no added nanotube materials.
Keywordssingle-wall carbon nanotube functionalization catalytically-active nanomaterial chemical warfare agent
Unable to display preview. Download preview PDF.
12274_2014_405_MOESM1_ESM.pdf (718 kb)
- Persian Gulf War Illness Task Force. Khamisiyah: A Historical Perspective on Related Intelligence [Online]. Persian Gulf War Illness Task Force; http://www.gulflink.osd.mil/cia_wp/ (accessed Aug 16, 2012).
- Army Medical Department Center and School. Multiservice Tactics, Techniques, and Procedures for Treatment of Chemical Agent Casualties and Conventional Military Chemical Injuries. Departments of the Army, The Navy, and the Air Force and the Commandant of the Marine Corps: Fort Sam Houston, TX, 2007.Google Scholar
- Popiel, S.; Nawala, J.; Sankowska, M.; Witkiewicz, Z.; Bernat, P. Enzymes as catalysts of decomposition of chemical warfare agents. Przem. Chem. 2010, 89, 1361–1369.Google Scholar
- Sharma, S. P.; Tomar, L. N. S.; Acharya, J.; Chaturvedi, A.; Suryanarayan, M. V. S.; Jain, R. Acetylcholinesterase inhibition-based biosensor for amperometric detection of Sarin using single-walled carbon nanotube-modified ferrule graphite electrode. Sens. Actuaters B-Chem. 2012, 166, 616–623.CrossRefGoogle Scholar
- Wei, Y.; Liu, Z. G.; Gao, C.; Wang, L.; Liu, J. H.; Huang, X. J. Electrochemical sensors and biosensors based on nanomaterials: A new approach for detection of organic micropollutants. Prog. Chem. 2012, 24, 616–627.Google Scholar
- Decker, J. E.; Hight Walker, A. R.; Bosnick, K.; Clifford, C. A.; Dai, L.; Fagan, J.; Hooker, S.; Jakubek, Z. J.; Kingston, C.; Makar, J. et al. Sample preparation protocols for realization of reproducible characterization of single-wall carbon nanotubes. Metrologia 2009, 46, 682–692.CrossRefGoogle Scholar
- Ritchie, N. DTSA-II [Online]. National Institute of Standards and Technology (NIST); Retrieved from the Public Domain Software from NIST: http://www.cstl.nist.gov/div837/837.02/index.html (accessed Oct 24, 2012).
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013