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A colorimetric sensing platform for the determination of HO using 2D-1D MoS-CNT nanozymes
Ist Teil von
RSC advances, 2022-10, Vol.12 (44), p.28349-28358
Erscheinungsjahr
2022
Quelle
EZB Free E-Journals
Beschreibungen/Notizen
A novel colorimetric platform based on nano-composites of two-dimensional (2D) molybdenum disulfide nanosheets (MoS
2
NSs) and one-dimensional (1D) carbon nanotubes (CNTs), called 2D-1D MoS
2
-CNT nanozyme, was fabricated for the selective and sensitive determination of hydrogen peroxide (H
2
O
2
) in soda water. The MoS
2
-CNT nanozyme was synthesized through a one-step solvothermal reduction method. The introduced CNTs could effectively prevent the stacking of MoS
2
nanosheets (NSs) and not only expanded the interlayer distance of MoS
2
NSs from 0.620 nm to 0.710 nm but also improved their specific surface. Under acidic conditions, the as-prepared 2D-1D MoS
2
-CNT nanozymes could oxidize the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue-oxidized TMB (oxTMB) in the presence of H
2
O
2
, resulting in enhanced peroxidase-like (POD-like) activity. The kinetic study showed that MoS
2
-CNT nanozyme had stronger catalytic activity than natural horseradish peroxidase (HRP). The linear range for H
2
O
2
colorimetric determination was 5.00-500 μmol L
−1
with a limit of detection (LOD) of 1.40 μmol L
−1
. Furthermore, the established determination method was applied to actual samples and the recoveries of H
2
O
2
spiked in soda water were in the range of 92.3-107%, showing feasibility for the analysis of food.
A novel colorimetric platform based on 2D-1D MoS
2
-CNT nanozymes, was fabricated for the selective and sensitive determination of hydrogen peroxide (H
2
O
2
) in soda water.
Sprache
–
Identifikatoren
eISSN: 2046-2069
DOI: 10.1039/d2ra04831k
Titel-ID: cdi_rsc_primary_d2ra04831k
Format
–
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