Synthesis and Characterization of Samarium-Substituted Molybdenum Diselenide and Its Graphene Oxide Nanohybrid for Enhancing the Selective Sensing of Chloramphenicol in a Milk Sample
Journal
ACS Applied Materials and Interfaces
Journal Volume
10
Journal Issue
35
Pages
29712-29723
Date Issued
2018
Author(s)
Abstract
The electronic conductivity and electrocatalytic activity of metal chalcogenides are normally enhanced by following the ideal strategies such as substitution/doping of heterogeneous atoms and hybridization of highly conductive carbon supportive materials. Here, a rare earth element (samarium) was substituted with MoSe 2 using the simple hydrothermal method. The lattice distortion due to the substitution of Sm 3+ with MoSe 2 was clearly observed by using high-resolution transmission electron microscopy analysis. As a consequence, the prepared SmMoSe 2 nanorod was encapsulated with graphene oxide (GO) sheets by using ultrasonication process. Furthermore, the GO-encapsulated SmMoSe 2 nanocomposite modified glassy carbon electrode (GO@SmMoSe 2 /GCE) was used for the sensing of chloramphenicol. The results showed that the GO@SmMoSe 2 /GCE revealed the superior electrocatalytic activity with low detection (5 nM) and sensitivity (20.6 £gA £gM -1 cm -2 ) to electrochemical detection of proposed analyte. It indicates that the substitution of Sm 3+ and encapsulation of GO significantly increased both the electrical conductivity and electrocatalytic activity of MoSe 2 . ? 2018 American Chemical Society.
Subjects
chloramphenicol
electrochemical sensor
graphene oxide
molybdenum diselenide
samarium
SDGs
Type
journal article