An environmentally benign one pot green synthesis of reduced graphene oxide based composites for the enzyme free electrochemical detection of hydrogen peroxide

George, Amala; Saravanan, J.; Yoo, Dong Jin; Kim, Ae Rhan; kumar, G. Gnana

doi:10.1039/c6nj04030f

Cited by 56 publications

(21 citation statements)

References 50 publications

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“…The peaks at about 40.15°, 46.61°, 68.19° and 82.3° corresponded to the (111), (200), (220) and (311) lattice planes of the fcc crystalline structure of Pd, respectively . The peaks at 38.16°, 44.42°, 64.5°and 77.53° were assigned to the (111), (200), (220) and (311) crystalline planes of cubic Ag, respectively . This result indicated that Pd‐Ag bimetallic nanoparticles supported on graphene (Pd‐Ag/rGO) was formed.…”

Section: Resultsmentioning

confidence: 85%

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Microbial synthesis of graphene‐supported highly‐dispersed Pd‐Ag bimetallic nanoparticles and its catalytic activity

Han

Song

Wang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Graphene‐supported nanocomposites are promising catalysts for their unique properties. Biosynthesis of such hybrid catalysts possesses several advantages over other methods such as less pollution. The palladium nanoparticle has versatile catalytic activities and its stability and activities can be significantly improved through hybridization with other nanomaterials including graphene. RESULTS In this study, bimetallic palladium‐silver nanoparticles supported on graphene (Pd‐Ag/rGO) was prepared through one‐step biosynthesis using a bacterium Shewanella oneidensis MR‐1. Shewanella oneidensis MR‐1 synthesized Pd‐Ag/rGO through simultaneous reduction of silver nitrate (AgNO3), palladium(II) nitrate (Pd(NO3)2) and graphene oxide (GO). The morphology and composition of the Pd‐Ag/rGO were characterized by transmission electron microscopy, energy dispersive X‐ray, X‐ray diffraction, X‐ray photoelectron spectroscopy, Fourier‐transform infrared spectroscopy and Raman spectroscopy. Furthermore, the hydrogenation activity of synthesized Pd‐Ag/rGO was tested using 4‐nitrophenol as a model chemical at room temperatures and pressure. The Pd‐Ag/rGO showed the best catalytic performance when Pd/Ag ratio was 1:1 and bacterial concentration was 1.0 of OD600 (optical density measured at a wavelength of 600 nm) for the preparation of Pd‐Ag/rGO. Therefore, the kinetic rate constant for 4‐NP reduction was 0.2413 min−1 catalyzed by as‐prepared Pd‐Ag/rGO, which is listed as one of the top level reported catalysts for 4‐NP reduction. CONCLUSION Therefore, this study demonstrated a material and energy‐saving method to synthesize hybrid nanoparticles supported on graphene with high catalytic activity. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 85%

“…24 The peaks at 38.16 ∘ , 44.42 ∘ , 64.5 ∘ and 77.53 ∘ were assigned to the (111), (200), (220) and (311) crystalline planes of cubic Ag, respectively. 25 This result indicated that Pd-Ag bimetallic nanoparticles supported on graphene (Pd-Ag/rGO) was formed.…”

Section: Characterization Of Pd-ag/rgomentioning

confidence: 96%

Microbial synthesis of graphene‐supported highly‐dispersed Pd‐Ag bimetallic nanoparticles and its catalytic activity

Han

Song

Wang

et al. 2019

J of Chemical Tech & Biotech

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“…These polymers are admirable platforms for the electrochemical sensing applications of ascorbic acid . In recent literature, electrochemical sensors became available for detection of glucose, hydrogen peroxide, dopamine and ascorbic acid (AA) …”

Section: Introductionmentioning

confidence: 99%

Aniline‐nonamer segmented polyurea: A facile electrocatalyst for detection of ascorbic acid

Arukula

Thota

Boga

et al. 2018

J of Applied Polymer Sci

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An unprecedented A‐B‐A type block copolymer electroactive polyurea (EPU) is designed and synthesized with tetraaniline dimer and 1,4‐phenylenediamine via an oxidative coupling, where aniline–nonamer and hexamethylene di‐urea constitute two segments. The EPU was characterized by spectral techniques such as Fourier transform infrared spectroscopy, nuclear magnetic resonance, and UV–vis spectra. The structural characterization of the prepared EPU was obtained by powder X‐ray diffraction and X‐ray photoelectron spectroscopy techniques. EPU reorganizes into core–shell microcapsules in presence of aqueous acetic acid/n‐octane interface. These microcapsules exhibited a wide range of pH responses in their absorption spectrum (UV–vis). The EPU is modified as carbon paste electrode which exhibits a remarkable electrocatalytic oxidation of ascorbic acid (AA, Vitamin C) in 0.2 M and pH 7.0 phosphate buffer solution. The carbon paste electrode is useful in sensing as low as 50 µM of ascorbic acid. This can open up new opportunities for fast, simple detection of AA providing a promising platform for sensor/biosensor designs for AA detection. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46630.

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“…Thus, H 2 O 2 determination is gaining more attention in the biomedical science, food inspection and industrial application as a countermeasure in preventing further damage on life and property. Various analytical methods, such as colorimetric , fluorescence , titrimetric , chemiluminescence , chromatography and electrochemical , have been established for detection and quantification of H 2 O 2 . Among these techniques, electrochemical detection has many advantages such as simple instrumentation, reliability, excellent sensitivity and selectivity and rapid response time.…”

Section: Introductionmentioning

confidence: 96%

Magnetite Nanorods Stabilized by Polyaniline/Reduced Graphene Oxide as a Sensing Platform for Selective and Sensitive Non‐enzymatic Hydrogen Peroxide Detection

et al. 2019

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In this study, magnetite nanorods stabilized on polyaniline/reduced graphene oxide (Fe3O4@PANI/rGO) was synthesized via a wet‐reflux strategy. The possible formation of Fe3O4@PANI/rGO was morphologically and structurally verified by field emission scanning electron microscopy (FE‐SEM), Fourier transform infrared (FT‐IR) spectroscopy, Raman spectroscopy, X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). Furthermore, the thermal stability of Fe3O4@PANI/rGO was measured by a thermogravimetric analyzer (TGA); the composite had good thermal stability owing to the ceramic nature of Fe3O4. The Fe3O4@PANI/rGO has been applied as a potential sensing platform for electrochemical detection of hydrogen peroxide (H2O2). By the combined efforts of extended active surface area, active carbon support, more catalytic active sites and high electrical conductivity, the Fe3O4@PANI/rGO exhibited an improved performance toward the non‐enzymatic detection of H2O2 in 0.5 M KOH with a fast response time (5 s), high sensitivity (223.7 μA mM−1 cm−2), low limit of detection (4.45 μM) and wide linear range (100 μM–1.5 mM). Furthermore, the fabricated sensor exhibited excellent recovery rates (94.2–104.0 %) during real sample analysis.

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An environmentally benign one pot green synthesis of reduced graphene oxide based composites for the enzyme free electrochemical detection of hydrogen peroxide

Abstract: An rGO/Ag–Pd nanocomposite prepared by using Arachis hypogaea scrap extract was exploited as an enzyme-free electrochemical probe for the detection of H2O2.

Cited by 56 publications

References 50 publications

Microbial synthesis of graphene‐supported highly‐dispersed Pd‐Ag bimetallic nanoparticles and its catalytic activity

Microbial synthesis of graphene‐supported highly‐dispersed Pd‐Ag bimetallic nanoparticles and its catalytic activity

Aniline‐nonamer segmented polyurea: A facile electrocatalyst for detection of ascorbic acid

Magnetite Nanorods Stabilized by Polyaniline/Reduced Graphene Oxide as a Sensing Platform for Selective and Sensitive Non‐enzymatic Hydrogen Peroxide Detection

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