TY - JOUR
T1 - Two-dimensional molecular imprinting approach for the electrochemical detection of trinitrotoluene
AU - Nie, Dongxia
AU - Jiang, Dawei
AU - Zhang, Dan
AU - Liang, Ying
AU - Xue, Ying
AU - Zhou, Tianshu
AU - Jin, Litong
AU - Shi, Guoyue
PY - 2011/8/10
Y1 - 2011/8/10
N2 - In this work, we demonstrated a sensitive and selective electrochemical sensing protocol for the detection of TNT prepared from alkanethiols self-assembled on AuNPs modified glassy carbon (GC) electrode with preadsorbed templates of TNT. It demonstrated that the 2D molecular imprinting monolayers (MIMs) can provide a better site accessibility and lower mass-transfer resistance, while the AuNPs can enhance electrode conductivity, facilitate the electron transfer and increase the amount of TNT-imprinted sites. The prepared sensor showed not only high selectivity toward TNT in comparison to other similar nitroaromatic compounds (NACs), but also a wide linear range over TNT concentration from 4.0 × 10-8 to 3.2 × 10-6 M with a detection limit of 1.3 × 10-8 M (S/N = 3). Moreover, the imprinted sensor has been applied to the determination of TNT in spiked environmental water samples and shows promise for fast and sensitive measurement of trace levels of TNT in real samples.
AB - In this work, we demonstrated a sensitive and selective electrochemical sensing protocol for the detection of TNT prepared from alkanethiols self-assembled on AuNPs modified glassy carbon (GC) electrode with preadsorbed templates of TNT. It demonstrated that the 2D molecular imprinting monolayers (MIMs) can provide a better site accessibility and lower mass-transfer resistance, while the AuNPs can enhance electrode conductivity, facilitate the electron transfer and increase the amount of TNT-imprinted sites. The prepared sensor showed not only high selectivity toward TNT in comparison to other similar nitroaromatic compounds (NACs), but also a wide linear range over TNT concentration from 4.0 × 10-8 to 3.2 × 10-6 M with a detection limit of 1.3 × 10-8 M (S/N = 3). Moreover, the imprinted sensor has been applied to the determination of TNT in spiked environmental water samples and shows promise for fast and sensitive measurement of trace levels of TNT in real samples.
KW - Au nanoparticles
KW - Electrochemical sensor
KW - Environmental water samples
KW - Molecular imprinting
KW - Trinitrotoluene
UR - https://www.scopus.com/pages/publications/79957877037
U2 - 10.1016/j.snb.2011.03.071
DO - 10.1016/j.snb.2011.03.071
M3 - 文章
AN - SCOPUS:79957877037
SN - 0925-4005
VL - 156
SP - 43
EP - 49
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
IS - 1
ER -