Graphene-based electrochemical sensor for detection of 2,4,6-trinitrotoluene (TNT) in seawater: the comparison of single-, few-, and multilayer graphene nanoribbons and graphite microparticles
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The detection of explosives in seawater is of great interest. We compared response single-, few-, and multilayer graphene nanoribbons and graphite microparticle-based electrodes toward the electrochemical reduction of 2,4,6-trinitrotoluene (TNT). We optimized parameters such as accumulation time, accumulation potential, and pH. We found that few-layer graphene exhibits about 20% enhanced signal for TNT after accumulation when compared to multilayer graphene nanoribbons. However, graphite microparticle-modified electrode provides higher sensitivity, and there was no significant difference in the performance of single-, few-, and multilayer graphene nanoribbons and graphite microparticles for the electrochemical detection of TNT. We established the limit of detection of TNT in untreated seawater at 1 μg/mL.
KeywordsElectrochemistry Sensors Explosives
This work was partially supported by MINDEF-NTU-JPP/10/07 grant from the Ministry of Defense, Singapore and NAP start-up fund (grant no. M58110066) provided by NTU.
- 6.USEPA (1992) Test methods for evaluating solid waste, proposed update II, Method 8330. EPA Report SW846, 3rd edn. US Environmental Protection Agency, Washington, DC, November 1992Google Scholar
- 15.Shao Y, Wang J, Wu H, Liu J, Aksay IA, Lin Y (2010) Electroanal 22:1027Google Scholar
- 17.Goh MS, Pumera M (2010) Chem Asian J. doi: 10.1002/asia.201000437
- 20.Nanointegris. Graphene technical data sheet. http://www.nanointegris.com/skin/frontend/default/nano/downloads/Graphene%20Technical%20Data%20Sheet.pdf