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29 results on '"Tang, Zengmin"'

4. Pd Nanoparticles Loaded on Cu Nanoplate Sensor for Ultrasensitive Detection of Dopamine.

Author

Tan, Haihu, Zhang, Xuan, Xie, Jinpu, Tang, Zengmin, Tang, Sijia, Xu, Lijian, and Yang, Pingping

Subjects
COPPER, ELECTROCHEMICAL sensors, SURFACE area, DETECTION limit, DOPAMINE, CARBON electrodes
Abstract

The detection of dopamine is of great significance for human health. Herein, Pd nanoparticles were loaded on Cu nanoplates (Pd/Cu NPTs) by a novel liquid phase reduction method. A novel dopamine (DA) electrochemical sensor based on the Pd NPs/Cu/glass carbon electrode (Pd/Cu NPTs/GCE) was constructed. This sensor showed a wide linear range of 0.047 mM to 1.122 mM and a low limit of detection (LOD) of 0.1045 μM (S/N = 3) for DA. The improved performance of this sensor is attributed to the obtained tiny Pd nanoparticles which increase the catalytic active sites and electrochemical active surface areas (ECSAs). Moreover, the larger surface area of two–dimensional Cu nanoplates can load more Pd nanoparticles, which is another reason to improve performance. The Pd/Cu NPTs/GCE sensor also showed a good reproducibility, stability, and excellent anti–interference ability. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Synthesis of Co 3 O 4 Nanoplates by Thermal Decomposition for the Colorimetric Detection of Dopamine.

Author

Tang, Zengmin, Zhang, Ling, Tang, Sijia, Li, Junping, Xu, Jianxiong, Li, Na, Xu, Lijian, and Du, Jingjing

Subjects
*COBALT hydroxides, *HYDROGEN peroxide, *SURFACE area, *DOPAMINE, *THERMOLYSIS
Abstract

Inorganic nanomaterials with enzyme-like activity have been attracting much attention due to their low cost, favorable stability, convenient storage, and simple preparation. Herein, Co3O4 nanoplates with a uniform nanostructure were prepared by the thermolysis of cobalt hydroxide at different temperatures, and the influence of the annealing temperature on the performance of the mimetic enzyme also was reported for the first time. The results demonstrated that Co3O4 nanoplates obtained at an annealing temperature of 200 °C possessed strong oxidase activity and efficiently catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) without the addition of hydrogen peroxide to generate the blue color product ox-TMB. Once the annealing temperature was increased to 500 °C and 800 °C, the oxidase activity of Co3O4 decreased rapidly, and was even inactivated. This might be attributed to the relatively large specific surface area of Co3O4 annealed at 200 °C. Besides this, based on the TMB-Co3O4 nanoplate system, a colorimetric analysis method was developed to detect dopamine with a limit of 0.82 μmol/L in a linear range from 1.6 μmol/L to 20 μmol/L. [ABSTRACT FROM AUTHOR]

Published
2022
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