3D graphene oxide-cobalt oxide polyhedrons for highly sensitive non-enzymatic electrochemical determination of hydrogen peroxide

Three-dimensional (3D) graphene with high specific surface area, excellent conductivity and designed porosity is essential for many practical applications. Herein, holey graphene oxide with nano pores was facilely prepared via a convenient mild defect-etching reaction and then fabricated to 3D nanostructures via a reduction method. Based on the 3D architectures, a novel enzymatic hydrogen peroxide sensor was successfully fabricated. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the 3D holey graphene oxide architectures (3DHGO). Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of 3DHGO at glassy carbon electrode (GCE). Excellent electrocatalytic activity to the reduction of H2O2 was observed, and a linear range of 5.0×10-8~5.0×10-5 M with a detection limit of 3.8×10-9 M was obtained. These results indicated that 3DHGO have potential as electrochemical biosensors.

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Palladium nanoparticles decorated (3-aminopropyl)triethoxysilane functionalized reduced graphene oxide for electrochemical determination of glucose and hydrogen peroxide

Journal of Electroanalytical Chemistry ◽

10.1016/j.jelechem.2018.12.052 ◽

2019 ◽

Vol 834 ◽

pp. 49-55 ◽

Cited By ~ 10

Author(s):

Muhammet Guler ◽

Yusuf Dilmac

Keyword(s):

Hydrogen Peroxide ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Palladium Nanoparticles ◽

Electrochemical Determination ◽

Reduced Graphene

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Ex-situ decoration of graphene oxide with palladium nanoparticles for the highly sensitive and selective electrochemical determination of chloramphenicol in food and biological samples

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2018.04.030 ◽

2018 ◽

Vol 89 ◽

pp. 26-38 ◽

Cited By ~ 17

Author(s):

Thangavelu Kokulnathan ◽

Tata Sanjay Kanna Sharma ◽

Shen-Ming Chen ◽

Tse-Wei Chen ◽

Bose Dinesh

Keyword(s):

Graphene Oxide ◽

Biological Samples ◽

Palladium Nanoparticles ◽

Electrochemical Determination ◽

Ex Situ ◽

Highly Sensitive

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Highly sensitive electrochemical determination of Sunset Yellow based on the ultrafine Au-Pd and reduced graphene oxide nanocomposites

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2016.07.061 ◽

2016 ◽

Vol 481 ◽

pp. 229-235 ◽

Cited By ~ 29

Author(s):

Jin Wang ◽

Beibei Yang ◽

Ke Zhang ◽

Duan Bin ◽

Yukihide Shiraishi ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Electrochemical Determination ◽

Sunset Yellow ◽

Reduced Graphene ◽

Highly Sensitive

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Flower-like Bi2S3 nanostructures grown on nitrogen-doped reduced graphene oxide for electrochemical determination of hydrogen peroxide

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2018.06.069 ◽

2018 ◽

Vol 530 ◽

pp. 361-371 ◽

Cited By ~ 14

Author(s):

Deivasigamani Ranjith Kumar ◽

Srinivasan Kesavan ◽

Marjorie Lara Baynosa ◽

Van Quang Nguyen ◽

Jae-Jin Shim

Keyword(s):

Hydrogen Peroxide ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Electrochemical Determination ◽

Nitrogen Doped ◽

Reduced Graphene

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A Label-Free Immunosensor Based on Graphene Oxide/Fe3O4/Prussian Blue Nanocomposites for the Electrochemical Determination of HBsAg

Biosensors ◽

10.3390/bios10030024 ◽

2020 ◽

Vol 10 (3) ◽

pp. 24 ◽

Cited By ~ 2

Author(s):

Shanshan Wei ◽

Haolin Xiao ◽

Liangli Cao ◽

Zhencheng Chen

Keyword(s):

Graphene Oxide ◽

Hepatitis B ◽

Prussian Blue ◽

Hepatitis B Surface Antigen ◽

Electrochemical Determination ◽

Detection Sensitivity ◽

Label Free ◽

Serum Samples ◽

Highly Sensitive

In this article, a highly sensitive label-free immunosensor based on a graphene oxide (GO)/Fe3O4/Prussian blue (PB) nanocomposite modified electrode was developed for the determination of human hepatitis B surface antigen (HBsAg). In this electrochemical immunoassay system, PB was used as a redox probe, while GO/Fe3O4/PB nanocomposites and AuNPs were prepared and coated on screen-printed electrodes to enhance the detection sensitivity and to immobilize the hepatitis B surface antibody (HBsAb). The immunosensor was fabricated based on the principle that the decrease in peak currents of PB is proportional to the concentration of HBsAg captured on the modified immunosensor. The experimental results revealed that the immunosensor exhibited a sensitive response to HBsAg in the range of 0.5 pg·mL−1 to 200 ng·mL−1, and with a low detection limit of 0.166 pg·mL−1 (S/N = 3). Furthermore, the proposed immunosensor was used to detect several clinical serum samples with acceptable results, and it also showed good reproducibility, selectivity and stability, which may have a promising potential application in clinical immunoassays.

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