Electrochemiluminescent graphene quantum dots enhanced by MoS2 as sensing platform: a novel molecularly imprinted electrochemiluminescence sensor for 2-methyl-4-chlorophenoxyacetic acid assay
Electrochemiluminescent graphene quantum dots enhanced by MoS2 as sensing platform: a novel molecularly imprinted electrochemiluminescence sensor for 2-methyl-4-chlorophenoxyacetic acid assay
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DOI：
10.1016/j.electacta.2017.01.043
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发表时间：
2017-02
影响因子：
6.6
通讯作者：
Yukun Yang;Guo-zhen Fang;Xiaomin Wang;Fuyuan Zhang;Jingmin Liu;Wen-jie Zheng;Shuo Wang
中科院分区：
文献类型：
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作者：
Yukun Yang;Guo-zhen Fang;Xiaomin Wang;Fuyuan Zhang;Jingmin Liu;Wen-jie Zheng;Shuo Wang
首次报道了一种新型发光材料二硫化钼-石墨烯量子点（MoS2-GQDs）杂化纳米复合材料的ECL特性及其应用。mos2与GQDs的杂交使纳米复合材料具有结构和成分上的优势，有利于提高GQDs的ECL性能。令人惊讶的是，使用MoS2-GQDs混合纳米复合材料可以显著增强ECL，其ECL强度分别比GQDs、mos2修饰电极和裸电极高~ 13倍、~ 185倍和~ 596倍。随后，以MoS2-GQDs杂化纳米复合材料为传感平台，制备了分子印迹电化学发光传感器，用于2-甲基-4-氯苯氧乙酸的超灵敏选择性测定。在最佳条件下，在10 μmol L−1 ~ 0.1 μmol L−1的线性浓度范围内，传感器的检出限为5.5 pmol L−1（S/N = 3）。该传感器灵敏度高、选择性好、重现性好、稳定性好，可用于食品安全和环境控制中痕量农药和兽药的检测。
The ECL properties and application of a novel luminescent material molybdenum disulfide-graphene quantum dots (MoS2-GQDs) hybrid nanocomposite was reported for the first time. The hybridization of MoS2and GQDs endowed nanocomposite with structural and compositional advantages for boosting the ECL performance of GQDs. Impressively, the ECL could be remarkable enhanced using MoS2-GQDs hybrid nanocomposite, which was ∼13, ∼185 and ∼596-folds larger than the ECL intensity of GQDs, MoS2modified electrodes and bare electrode, respectively. Subsequently, as a sensing platform, the MoS2-GQDs hybrid nanocomposite was applied to fabricate molecularly imprinted electrochemiluminescence sensor for the ultrasensitive and selective determination of 2-methyl-4-chlorophenoxyacetic acid. Under optimal conditions, the detection limit of the prepared sensor was 5.5 pmol L−1(S/N = 3) within a linear concentration range of 10 pmol L−1–0.1 μmol L−1. The developped sensor exhibited high sensitivity, good selectivity, reproducibility and stability, suggesting the potential for detecting pesticides and veterinary drugs at trace levels in food safety and environmental control.