A novel enzyme-free hydrogen peroxide sensor based on polyethylenimine-grafted graphene oxide-Pd particles modified electrode

Xu, Chunying; Zhang, Liping; Liu, Lin; Shi, Yunfeng; Wang, Huajie; Wang, Xiangbei; Wang, Fangfang; Yuan, Baiqing; Zhang, Daojun

doi:10.1016/j.jelechem.2014.08.003

Cited by 24 publications

(5 citation statements)

References 40 publications

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“…The mixture solution was then transferred into a Teflon-lined stainless steel autoclave (50 mL) and kept at 180 °C for 12 h. Finally, the sample was collected by centrifugation and washed several times by deionized water. It should be noted that the methods involved in the preparation of the G-P-CoS hybrid nanosheets are totally different from those reported in previous literature. , …”

Section: Experimental Methodsmentioning

confidence: 91%

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Polyethyleneimine-Mediated Fabrication of Two-Dimensional Cobalt Sulfide/Graphene Hybrid Nanosheets for High-Performance Supercapacitors

Wang

Yang

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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Two-dimensional (2D) hybrid nanosheets made of electrochemically active materials and graphene, featuring fast reaction kinetics and excellent structural stability, are appealing as electrodes for supercapacitors. Herein, we report a general polyethyleneimine (PEI)-mediated fabrication of the 2D cobalt sulfide/graphene hybrid nanosheets via a facile hydrothermal strategy. Detailed analysis reveals that the uniform cobalt sulfide (CoS) nanoparticles are well-anchored on the 2D graphene surface. Thereinto, the nitrogen species originating from the PEI molecules as bridging sites are helpful in enhancing the coupling effect between the graphene and CoS species, which endows the hybrid nanosheets with high electroactivity and excellent structural stability. The as-obtained hybrid nanosheets with typical pseudocapacitive features demonstrate a high specific capacitance (320 F g–1@1 A g–1) and a superior electrochemical stability with the initial capacitance of 86.5% after 20 000 cycles as electrodes for supercapacitors. The assembled asymmetric supercapacitors by combining activated carbon electrodes further show a high charge storage of 28.8 Wh kg–1 with an output power of 130 W kg–1. More importantly, the similar strategy can be easily extended to fabricate other 2D hybrid nanosheets with extraordinary electrochemical performance with the maximum charge storage of 815 F g–1 and energy density of 44. 6 Wh kg–1. The present work, which achieves the general fabrication of 2D hybrid nanosheets with tuned compositions, may provide a new opportunity for the development of supercapacitors.

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Section: Experimental Methodsmentioning

confidence: 91%

“…It should be noted that the methods involved in the preparation of the G-P-CoS hybrid nanosheets are totally different from those reported in previous literature. 34,35 2.3. Fabrication of Other 2D G-P-X Hybrid Nanosheets (X Stands for NiCoS, FeOOH, NiOOH).…”

Section: Experimental Methodsmentioning

confidence: 99%

Polyethyleneimine-Mediated Fabrication of Two-Dimensional Cobalt Sulfide/Graphene Hybrid Nanosheets for High-Performance Supercapacitors

Wang

Yang

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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“…Because of its active amine groups, PEI can easily attach to certain active groups of GO (e.g., carboxyl or epoxy groups) covalently and simultaneously reduce GO to PEI–rGO, minimizing the synthesis steps and increasing the conductivity. Moreover, PEI can act as an electron promoter between the electrode and electrolyte solution, leading to a more sensitive response; hence, it can be a perfect candidate for the surface modification of GO and electrochemical sensors. , However, only a few reports on PEI-graphene-based electrochemical biosensors have been presented for detection of the following analytes: H 2 O 2 , , dopamine, , Escherichia coli, glucose, gallic acid, metal ions, and gas molecules . Furthermore, the applications and schemes of PEI–rGO in these studies are completely or quite different from those of the present study.…”

Section: Introductionmentioning

confidence: 99%

Label-Free, Highly Sensitive Electrochemical Aptasensors Using Polymer-Modified Reduced Graphene Oxide for Cardiac Biomarker Detection

2020

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Acute myocardial infarction (AMI), also recognized as a “heart attack,” is one leading cause of death globally, and cardiac myoglobin (cMb), an important cardiac biomarker, is used for the early assessment of AMI. This paper presents an ultrasensitive, label-free electrochemical aptamer-based sensor (aptasensor) for cMb detection using polyethylenimine (PEI)-functionalized reduced graphene oxide (PEI–rGO) thin films. PEI, a cationic polymer, was used as a reducing agent for graphene oxide (GO), providing highly positive charges on the rGO surface and allowing direct immobilization of negatively charged single-strand DNA aptamers against cMb via electrostatic interaction without any linker or coupling chemistry. The presence of cMb was detected on Mb aptamer-modified electrodes using differential pulse voltammetry via measuring the current change due to the direct electron transfer between the electrodes and cMb proteins (Fe3+/Fe2+). The limits of detection were 0.97 pg mL–1 (phosphate-buffered saline) and 2.1 pg mL–1 (10-fold-diluted human serum), with a linear behavior with logarithmic cMb concentration. The specificity and reproducibility of the aptasensors were also examined. This electrochemical aptasensor using polymer-modified rGO shows potential for the early assessment of cMb in point-of-care testing applications.

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“…The results demonstrated that the Pd-PEI/GO/GC electrode exhibited high electrocatalytic activity toward H 2 O 2 reduction [9]. PEI is a positively charged polyamine that contains abundant amine groups and has been used to modify metallic nanoparticles due to the interaction between the amine groups and metal atoms [9].…”

Section: Introductionmentioning

confidence: 99%

“…PEI is a positively charged polyamine that contains abundant amine groups and has been used to modify metallic nanoparticles due to the interaction between the amine groups and metal atoms [9]. Deng and coworkers [10] presented a sensitive and stable biosensor that employed GOx immobilized on the negatively charged CNT surface by alternatively assembling a cationic (PEI) layer and a GOx layer.…”

Section: Introductionmentioning

confidence: 99%

Polyethyleneimine Modified Carbon Cloth Anode for Self-Pumping Enzymatic Glucose Biofuel Cell

Huang

Duong

Wang

et al. 2018

Journal of Renewable Energy

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This paper proposes a simplified process that immobilizes enzymes onto carbon cloth electrodes to increase biofuel cell functionality. Polyethyleneimine (PEI) is used to modify carbon cloth electrodes to reduce the processing time and increase selfpumping enzymatic glucose biofuel cell (self-pumping EGBC) electricity. PEI is usually used in biochemical engineering gene transfection as GOx support to enhance enzyme immobilization. PEI is a good candidate for increasing enzymatic biofuel cell (EBC) redox current. PEI and GOx have been successfully immobilized onto carbon cloth electrodes through FT-IR analysis. A UV/Vis spectrophotometer was used to investigate the best PEI support concentration. PEI was proven to improve redox current by cyclic voltammetry analysis. The results show that the GOx/PEI electrode has excellent hydrophilicity on the GOx/PEI electrode surface using contact angle measurement. The optical and electrochemical analysis result shows that GOx/PEI was successfully immobilized onto carbon cloth electrodes. Experimental analysis showed that self-pumping EGBC achieved a power output of 0.609 mW/cm 2 (126.9 mW/cm 3 ). PEI contributes to the shortening of the process from a few hours to 5-10 minutes and enhances GOx fuel cell performance.

show abstract

A novel enzyme-free hydrogen peroxide sensor based on polyethylenimine-grafted graphene oxide-Pd particles modified electrode

Cited by 24 publications

References 40 publications

Polyethyleneimine-Mediated Fabrication of Two-Dimensional Cobalt Sulfide/Graphene Hybrid Nanosheets for High-Performance Supercapacitors

Polyethyleneimine-Mediated Fabrication of Two-Dimensional Cobalt Sulfide/Graphene Hybrid Nanosheets for High-Performance Supercapacitors

Label-Free, Highly Sensitive Electrochemical Aptasensors Using Polymer-Modified Reduced Graphene Oxide for Cardiac Biomarker Detection

Polyethyleneimine Modified Carbon Cloth Anode for Self-Pumping Enzymatic Glucose Biofuel Cell

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