Solvent dispersible nanocomposite based on Reduced Graphene Oxide and in-situ decorated gold nanoparticles

Ingrosso, Chiara; Corricelli, Michela; Disha, A.; Fanizza, Elisabetta; Bianco, Giuseppe Valerio; Depalo, Nicoletta; Panniello, Annamaria; Agostiano, Angela; Striccoli, Marinella; Curri, Maria Lucia

doi:10.1016/j.carbon.2019.06.070

Cited by 14 publications

(47 citation statements)

References 38 publications

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“…Commercial RGO powder was exfoliated and functionalized with 1-Pyrenecarboxylic acid (PCA) by sonicating in an ice-cooled water bath, a 1:17 w/w mixture of RGO and PCA in n-methyl-2-pyrrolidone (NMP). The excess of PCA was removed by cycles of centrifugation and redispersion in methanol [4]. Finally, the purified PCA-RGO powder was dispersed in NMP, obtaining a final concentration of 3 mg mL −1 .…”

Section: Exfoliation and Functionalization Of Rgo With Pcamentioning

confidence: 99%

“…The PCA-RGO/Au NPs dispersions were purified with methanol by cycles of precipitation by centrifugation and redissolution in solvent. In a final step, a precipitation procedure was performed by addition of methanol and centrifugation, in order to separate the PCA-RGO/Au NPs hybrid nanocomposite from the DMBT-coated Au NPs homonucleated in the supernatant of the reaction solution [4]. The isolated pellet containing the hybrid nanocomposite was finally redispersed in toluene for spectroscopy, morphology, electrical and electrochemical characterizations.…”

Section: Synthesis Of Pca-rgo/au Nps Hybrid Nanocompositementioning

confidence: 99%

“…Chemosensors 2022, 10, 67 2 of 14 Hence, a plethora of interesting functionalities are possible [4], which can be integrated in sensors for the detection of hazardous compounds. Arsenic(III) (As(III)) is a highly toxic heavy metal ion (HMI) responsible for contamination of surface and groundwater, deriving both from natural and anthropogenic sources [5].…”

Section: Introductionmentioning

confidence: 99%

“…Hybrid nanocomposites formed of reduced graphene oxide (RGO), surface coated by electrodeposited Au NPs, have been used for detecting As(III) in water and soil samples [19] with high sensitivity and ease of application, thanks to the merging of the intrinsic functionalities of both components. In this work, nanoplatforms formed of carbon screenprinted electrodes (C-SPEs) surface modified by a hybrid nanocomposite formed of reduced graphene oxide (RGO), functionalized with 1-pyrene carboxylic acid (PCA), then decorated by a dense and uniform layer of Au NPs that were synthesized by an in situ approach [4], were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). These have been tested for the detection of As(III) in water, and their properties have been compared with respect to C-SPEs modified by bare PCA-RGO and Au NPs alone, and by their layer-by-layer PCA-RGO@Au NPs junction.…”

Section: Introductionmentioning

confidence: 99%

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Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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Electrochemical sensors integrating hybrid nanostructured platforms are a promising alternative to conventional detection techniques for addressing highly relevant challenges of heavy metal determination in the environment. Hybrid nanocomposites based on graphene derivatives and inorganic nanoparticles (NPs) are ideal candidates as active materials for detecting heavy metals, as they merge the relevant physico-chemical properties of both the components, finally leading to a rapid and sensitive current response. In this work, a hybrid nanocomposite formed of reduced graphene oxide (RGO) sheets, surface functionalized by π-π interactions with 1-pyrene carboxylic acid (PCA), and decorated in situ by Au NPs, was synthesized by using a colloidal route. The hybrid nanocomposite was characterized by cyclic voltammetry and electrochemical impedance spectroscopy with respect to the corresponding single components, both bare and deposited as a layer-by-layer junction onto the electrode. The results demonstrated the high electrochemical activity of the hybrid nanocomposite with respect to the single components, highlighting the crucial role of the nanostructured surface morphology of the electrode and the PCA coupling agent at the NPs-RGO interphase in enhancing the nanocomposite electroactivity. Finally, the Au NP-decorated PCA-RGO sheets were tested by anodic stripping voltammetry of As(III) ion—a particularly relevant analyte among heavy metal ions—in order to assess the sensing ability of the nanocomposite material with respect to its single components. The nanocomposite has been found to present a sensitivity higher than that characterizing the bare components, with LODs complying with the directives established by the U.S. EPA and in line with those reported for state-of-the-art electrochemical sensors based on other Au-graphene nanocomposites.

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Section: Exfoliation and Functionalization Of Rgo With Pcamentioning

confidence: 99%

Section: Synthesis Of Pca-rgo/au Nps Hybrid Nanocompositementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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“…), Reduced Graphene Oxide (RGO) nanocomposite in situ decorated with gold nanoparticles, Au nanorods-functionalized nanostructured TiO 2 transparent electrodes, conductive polymers (polypyrrole, polyaniline polythiophene, etc.) have demonstrated to enhance the features of SPEs in terms of cost-effectiveness, biocompatibility, conductivity, mechanical resistance and micro-environment stabilizers [ [52] , [53] , [54] , [55] , [56] , [57] , [58] , [59] , [60] , [61] , [62] , [63] , [64] , [65] ].…”

Section: Tips On Spes Manufacture and Customizationmentioning

confidence: 99%

Nano-engineered screen-printed electrodes: A dynamic tool for detection of viruses

Sher

Faheem

Asghar

et al. 2021

TrAC Trends in Analytical Chemistry

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There is a growing interest in the development of portable, cost-effective, and easy-to-use biosensors for the rapid detection of diseases caused by infectious viruses: COVID-19 pandemic has highlighted the central role of diagnostics in response to global outbreaks. Among all the existing technologies, screen-printed electrodes (SPEs) represent a valuable technology for the detection of various viral pathogens. During the last five years, various nanomaterials have been utilized to modify SPEs to achieve convincing effects on the analytical performances of portable SPE-based diagnostics. Herein we would like to provide the readers a comprehensive investigation about the recent combination between SPEs and various nanomaterials for detecting viral pathogens. Manufacturing methods and features advances are critically discussed in the context of early-stage detection of diseases caused by HIV-1, HBV, HCV, Zika, Dengue, and Sars-CoV-2. A detailed table is reported to easily guide readers toward the “right” choice depending on the virus of interest.

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Hybridizing strategy of decatungstate by Au nanoparticles for enhanced photo-catalytic oxidation of hydrocarbons by dioxygens

Yang

Zhu

et al. 2022

Applied Catalysis A: General

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Solvent dispersible nanocomposite based on Reduced Graphene Oxide and in-situ decorated gold nanoparticles

Cited by 14 publications

References 38 publications

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Nano-engineered screen-printed electrodes: A dynamic tool for detection of viruses

Hybridizing strategy of decatungstate by Au nanoparticles for enhanced photo-catalytic oxidation of hydrocarbons by dioxygens

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