Enhanced catalytic performance by copper nanoparticle–graphene based composite

Mondal, Paramita; Sinha, Arjyabaran; Salam, Noor; Roy, Anupam Singha; Jana, Nikhil R.; Islam, Sk. Manirul

doi:10.1039/c3ra23280h

Cited by 159 publications

(95 citation statements)

References 44 publications

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“…They found that the developed heterogeneous catalyst is easily recoverable and could be reused several times. 17 However, in all the cases, CuĲII) oxide was formed as an unavoidable mixture with Cu(0) nanoparticles. Moreover, both research groups used hydrazine hydride and NaBH 4 , which are toxic, as reducing agents.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of stable Cu(0) nanoparticles onto reduced graphene oxide nanosheets: a reusable catalyst for the synthesis of symmetrical biaryls from arylboronic acids under base-free conditions

Hussain

Gogoi

Azhaganand

et al. 2015

Catal. Sci. Technol.

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Highly stable Cu(0) nanoparticles were synthesized on reduced graphene oxide (rGO) sheets using a cost-effective and green method. The synthesized CuĲ0)-nanoparticle-rGO composites exhibit excellent catalytic activity for the synthesis of symmetrical biaryls from arylboronic acids under microwave irradiation. The reaction proceeds smoothly in base-free conditions with easy recovery and reuse of the catalyst. The methodology is compatible with various functional groups and provides an attractive protocol for the synthesis of symmetrical biaryls with very good yields. HRTEM, XPS and XRD analyses showed the catalyst to be recyclable. The Cu(0) nanoparticles are stable in the rGO nanosheets, and the particle size distribution and oxidation state of the Cu(0) nanoparticle remain the same after performing the chemical reaction.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of stable Cu(0) nanoparticles onto reduced graphene oxide nanosheets: a reusable catalyst for the synthesis of symmetrical biaryls from arylboronic acids under base-free conditions

Hussain

Gogoi

Azhaganand

et al. 2015

Catal. Sci. Technol.

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“…The morphology 100 of the Cu NPs was characterized by FESEM. The Raman spectra demonstrate that two obvious bands at 1330 cm -1 and 1600 cm -1 are attributed to the carbon material 44 . 1C) show that the Cu NPs have an average diameter of 80-120 nm.…”

Section: Characterizations Of Cu Npsmentioning

confidence: 96%

Humic acid-assisted synthesis of stable copper nanoparticles as a peroxidase mimetic and their application in glucose detection

Wang

Qiao

et al. 2015

J. Mater. Chem. B

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In this report, stable copper nanoparticles (Cu NPs) were prepared by a facile annealing process using humic acid as the reducing and stabilizing agent. The products were characterized by X-ray powder diffraction, scanning electron microscope and Fourier transform infrared spectroscopy. The prepared Cu NPs show remarkable intrinsic peroxidase-like activity, which can fleetly catalyze the oxidation of peroxidase substrate 3, 3′, 5, 5′-tetramethylbenzidine (TMB) in the presence of H 2 O 2 to produce a blue 10 color reaction. The detection limit of H 2 O 2 by Cu NPs can be as low as 1.32 × 10 -7 M. More importantly, the prepared Cu NPs shows excellent stability, which can hardly been oxidized even after 6 months. Based on the above mechanism, a simple, rapid and selective colorimetric method for the glucose detection was developed, and the detection limit of the glucose was 6.86 × 10 -7 M. This work provides a novel method for the preparation of stable Cu NPs, which may have wide applications on the detection of 15 glucose in human body and pear juice.

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“…No article was earlier reported the use of CuO supported on graphene oxide as catalyst for oxidation of cyclohexane. Only few articles published over Cu nano particles supported on carbon based materials for coupling reactions . Generally, Cu metal particles are mostly appealing because of copper's nontoxic nature, low‐cost and high natural abundance …”

Section: Catalyst Screening In the Formation Of Productsmentioning

confidence: 99%

CuO/Graphene Oxide Nanocomposite as Highly Active and Durable Catalyst for Selective Oxidation of Cyclohexane

Rana

Jonnalagadda

2017

ChemistrySelect

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Achieving breakage of C−H bond of hydrocarbons performance still remains a significant challenge in oxidation chemistry for heterogeneous catalyst. In this work, we report copper oxide‐ graphene oxide (CuO‐GO) nanocomposites as durable and highly active and selective catalyst for oxidation of cyclohexane. Different wt% of Cu(II) loaded on RGO surface to form a nanocomposite as well as Co(II) and Ni(II) loaded GO composites were prepared by wet impregnation method. The efficacy of catalyst was tested towards selective oxidation of cyclohexane. 5wt%CuO‐GO proved to be superior in terms improved selectivity towards cyclohexanone (82 %) and short reaction times, plus easy recovery and reusability of the catalyst. The presence of functional groups prevent the aggregation of catalytically active CuO species during the reaction progress.

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Enhanced catalytic performance by copper nanoparticle–graphene based composite

Cited by 159 publications

References 44 publications

Green synthesis of stable Cu(0) nanoparticles onto reduced graphene oxide nanosheets: a reusable catalyst for the synthesis of symmetrical biaryls from arylboronic acids under base-free conditions

Green synthesis of stable Cu(0) nanoparticles onto reduced graphene oxide nanosheets: a reusable catalyst for the synthesis of symmetrical biaryls from arylboronic acids under base-free conditions

Humic acid-assisted synthesis of stable copper nanoparticles as a peroxidase mimetic and their application in glucose detection

CuO/Graphene Oxide Nanocomposite as Highly Active and Durable Catalyst for Selective Oxidation of Cyclohexane

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