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Talanta. 2015 Aug 15;141:47-52. doi: 10.1016/j.talanta.2015.03.055. Epub 2015 Apr 2.

SDS-MoS2 nanoparticles as highly-efficient peroxidase mimetics for colorimetric detection of H2O2 and glucose.

Author information

1
Department of Chemistry, East China Normal University, Shanghai 200242, China.
2
Department of Chemistry, East China Normal University, Shanghai 200242, China. Electronic address: clzhang@chem.ecnu.edu.cn.
3
Department of Chemistry, East China Normal University, Shanghai 200242, China. Electronic address: yzxian@chem.ecnu.edu.cn.

Abstract

In this work, we find that the peroxidase-like activity of MoS2 nanoparticles (NPs) is dependent on the surface charge. Negatively charged sodium dodecyl sulfate modified MoS2 nanoparticles (SDS-MoS2 NPs) possess highly-efficient peroxidase-like activity. MoS2 NPs with intrinsic peroxidase-like activity were synthesized through a simple one-pot hydrothermal route. The peroxidase-like activities of different surfactants modified MoS2 NPs were discussed. Compared with bare MoS2 NPs and positively charged cetyltrimethyl ammonium bromide modified MoS2 NPs, SDS-MoS2 NPs have the best peroxidase-like activity. SDS-MoS2 NPs can efficiently catalyze the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of H2O2 to generate a blue product. On basis of this, we have successfully established a novel platform for colorimetric detection of H2O2, and the detection limit is 0.32μM. Furthermore, the SDS-MoS2 NPs based platform can also be used for high sensitivity and selectivity detection of glucose with a wide linear range of 5.0-500μM by controlling the generation of H2O2 in the presence of glucose oxidase.

KEYWORDS:

Colorimetric detection; Glucose; Hydrogen peroxide; Molybdenum disulfide; Peroxidase mimetics; Surfactant

PMID:
25966379
DOI:
10.1016/j.talanta.2015.03.055
[Indexed for MEDLINE]

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