S-doped reduced graphene oxide: a novel peroxidase mimetic and its application in sensitive detection of hydrogen peroxide and glucose.
Anal Bioanal Chem
; 412(22): 5477-5487, 2020 Sep.
Article
em En
| MEDLINE
| ID: mdl-32588108
ABSTRACT
This article presents a novel peroxidase mimetic by doping S atoms into reduced graphene oxide (rGO), which was synthesized through a facile hydrothermal reaction without any templates or surfactants. The peroxidase-like activity of S-doped rGO (S-rGO) is greatly boosted compared with the pristine rGO, demonstrating the peroxidase-like active sites are dominantly originated in sulfur-containing groups. The steady-state kinetic studies further indicate that S-rGO obeys the typical Michaelis-Menten curves and has a much smaller Michaelis constant (Km) for hydrogen peroxide (H2O2) and 3, 3', 5, 5'-tetramethylbenzidine (TMB). In view of the outstanding performance of S-rGO as a peroxidase mimetic, an efficient and sensitive colorimetric detection platform for H2O2 and glucose has been successfully established. The linear detection for H2O2 is obtained in a range of 0.1-1 µM with an extremely lower detection limit of 0.042 µM, and glucose can be measured in a linear range of 1-100 µM, giving a detection limit of 0.38 µM. This study not only provides a new avenue for the reasonable design of heteroatom-doped carbon-based nanomaterials but also offers meaningful reference for detecting the important biomolecules in biotechnology. Graphical abstract.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Peroxidases
/
Mimetismo Molecular
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Glucose
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Grafite
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Peróxido de Hidrogênio
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Anal Bioanal Chem
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
China