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Porphyrin Functionalized Graphene for Sensitive Electrochemical Detection of Ultratrace Explosives
Author(s) -
Guo Chun Xian,
Lei Yu,
Li Chang Ming
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000522
Subject(s) - porphyrin , graphene , explosive material , trinitrotoluene , electrochemistry , explosive detection , reproducibility , materials science , detection limit , nanotechnology , chemistry , photochemistry , electrode , chromatography , organic chemistry
Abstract Porphyrin functionalized graphene is used to electrochemically detect nitroaromatic explosives. It is found that synergistic effects from the specific good adsorptive properties of porphyrin and the large electroactive surface area and fast charge transfer of graphene contribute to the sensitive detection. The porphyrin/graphene sensor shows an ultratrace detection of as low as 1 ppb of 2,4‐dinitrotoluene, 0.5 ppb of 2,4,6‐trinitrotoluene, 1 ppb of 1,3,5‐trinitrobenzene and 2 ppb of 1,3‐dinitrobenzene respectively and good reproducibility within 5.1 % standard deviation for a series of 9 repetitive measurements. The porphyrin/graphene sensor provides a unique platform in the analysis of nitroaromatic explosives for various security and environmental applications.