Gold-graphene oxide nanohybrids: A review on their chemical catalysis

Amir, Muhammad Nur Iman; Halilu, Ahmed; Julkapli, Nurhidayatullaili Muhd; Ma’amor, Azman

doi:10.1016/j.jiec.2019.11.029

Cited by 27 publications

(16 citation statements)

References 105 publications

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“…As shown in Figure 2A , rGO has a continuous smooth surface structure accompanied by a folded paper shape, with a large specific surface area, and is a good substrate for loading a large number of nanoparticles. After rGO was combined with AuNPs, the SEM image ( Figure 2B ) showed that a large number of spherical metal nanoparticles were obviously attached to the lamellar structure of rGO ( Amir et al, 2020 ). Figures 2C,D are EDS spectra of rGO and AuNPs/rGO.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Detection of Carcinoembryonic Antigen via an Electrochemical Platform Fabricated by AuNPs/Streptavidin/Reduced Graphene Oxide

Guo

2022

Front. Chem.

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Tumor markers are one of the important indicators for early cancer diagnosis. As a new analytical method, electrochemical immunosensing analysis has the advantages of high sensitivity, good selectivity, and rapid detection, which is of great significance for the detection of tumor markers. In this work, an AuNP/reduced graphene oxide (AuNP/rGO) composite was synthesized. We used it for electrochemical sensor fabrication with the assistance of the biotin–streptavidin protein (SA) system to further amplify the signal to achieve sensitive detection of carcinoembryonic antigen (CEA). In addition, AuNPs have been incorporated due to their good electrical conductivity and biocompatibility, which can accelerate electron transfer at the electrode interface and improve the loading capacity to capture antibodies. The fabricated AuNPs/SA/rGO has a large working surface area and high material utilization ratio, which improves the catalytic capacity of H2O2 reduction and effectively amplifies the current signal. The linear range of the response current signal of the sensor toward the CEA concentration is 20 fg/ml to 200 ng/ml, and the limit of detection can achieve 6.2 fg/ml. In addition, the fabricated immunosensor has good reproducibility, selectivity, and stability.

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Section: Resultsmentioning

confidence: 99%

Highly Sensitive Detection of Carcinoembryonic Antigen via an Electrochemical Platform Fabricated by AuNPs/Streptavidin/Reduced Graphene Oxide

Guo

2022

Front. Chem.

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“…It was confirmed by CV cycle with a hydrogen peroxide pathway that the developed GO/Co/chitosan-based nano-biosensor enables the transfer of two elections using D-glucose. The formation of Co nanorods in the GO/Co/chitosan composite has been reported with significant promotion for electron transfer at the active site of Gox [ 9 , 13 , 22 , 23 ]. The electro-chemical performance of the GO/Co/chitosan-modified Au film electrode was evaluated by cyclic voltammogram (CV) with a scan rate from 0.01 to 0.1 mV/s with a 0.01 interval on the first day, as shown in Figure 3 c. The results indicated that the redox reactions were completed while the peak point of this redox reaction was increased with an increasing scan rate.…”

Section: Resultsmentioning

confidence: 99%

“…Cobalt hydroxide has well-defined electrochemical redox activity [ 12 ]. Cobalt has been utilized in alkaline batteries, fuel cells and capacitors and is a promising material for electrodes, where the GO surface is modified by cobalt [ 13 ]. The introduction of a GO/Co composite contributed to an enhancement of power density, thereby increasing the affinity between enzymes and electrodes.…”

Section: Introductionmentioning

confidence: 99%

Development of GO/Co/Chitosan-Based Nano-Biosensor for Real-Time Detection of D-Glucose

et al. 2022

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Electrochemical nano-biosensor systems are popular in the industrial field, along with evaluations of medical, agricultural, environmental and sports analysis, because they can simultaneously perform qualitative and quantitative analyses with high sensitivity. However, real-time detection using an electrochemical nano-biosensor is greatly affected by the surrounding environment with the performance of the electron transport materials. Therefore, many researchers are trying to find good factors for real-time detection. In this work, it was found that a composite composed of graphite oxide/cobalt/chitosan had strong stability and electron transfer capability and was applied to a bioelectrochemical nano-biosensor with high sensitivity and stability. As a mediator-modified electrode, the GO/Co/chitosan composite was electrically deposited onto an Au film electrode by covalent boding, while glucose oxidase as a receptor was immobilized on the end of the GO/Co/chitosan composite. It was confirmed that the electron transfer ability of the GO/Co/chitosan composite was excellent, as shown with power density analysis. In addition, the real-time detection of D-glucose could be successfully performed by the developed nano-biosensor with a high range of detected concentrations from 1.0 to 15.0 mM. Furthermore, the slope value composed of the current, per the concentration of D-glucose as a detection response, was significantly maintained even after 14 days.

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“…[1][2][3] GO and rGO provide ideal supports for metal NPs due to their high surface area, thermal and chemical stability, and plentiful oxygen functional group defect sites, which facilitate attachment of metal NPs to produce functional materials. [1][2][3] In particular, functional nanocomposites consisting of Au NPs supported on GO and rGO are used for biomedical sensing, 3,4 photothermal cancer treatment, 3,5 heterogeneous catalysis, 6,7 and plasmonenhanced optoelectronic applications including photocatalysis, photodetectors, and solar cells. 8 Many synthesis routes to produce metal-GO/rGO materials involve chemical reducing agents and surfactants, 7,[9][10][11][12][13][14] which are often toxic and environmentally unsustainable.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] In particular, functional nanocomposites consisting of Au NPs supported on GO and rGO are used for biomedical sensing, 3,4 photothermal cancer treatment, 3,5 heterogeneous catalysis, 6,7 and plasmonenhanced optoelectronic applications including photocatalysis, photodetectors, and solar cells. 8 Many synthesis routes to produce metal-GO/rGO materials involve chemical reducing agents and surfactants, 7,[9][10][11][12][13][14] which are often toxic and environmentally unsustainable. To avoid the use of toxic chemicals, green synthesis approaches to metal-GO nanocomposites using atmospheric plasma, 15,16 gamma radiation, 17,18 UV irradiation, [19][20][21][22] and lasers [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] have been developed.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted synthesis of gold–graphene oxide nanocomposites: effect of pulse duration

Bobb

Rodrigues

El‐Shall

et al. 2020

Phys. Chem. Chem. Phys.

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Gold-graphene oxide nanohybrids: A review on their chemical catalysis

Cited by 27 publications

References 105 publications

Highly Sensitive Detection of Carcinoembryonic Antigen via an Electrochemical Platform Fabricated by AuNPs/Streptavidin/Reduced Graphene Oxide

Highly Sensitive Detection of Carcinoembryonic Antigen via an Electrochemical Platform Fabricated by AuNPs/Streptavidin/Reduced Graphene Oxide

Development of GO/Co/Chitosan-Based Nano-Biosensor for Real-Time Detection of D-Glucose

Laser-assisted synthesis of gold–graphene oxide nanocomposites: effect of pulse duration

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