Novel synthesis of a mixed Cu/CuO–reduced graphene oxide nanocomposite with enhanced peroxidase-like catalytic activity for easy detection of glutathione in solution and using a paper strip

Singh, Preeti; Nath, Peuli; Arun, Ravi Kumar; Mandal, Soumen; Chanda, Nripen

doi:10.1039/c6ra20882g

Cited by 62 publications

(39 citation statements)

References 49 publications

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“…Besides their intrinsic enzymatic activity,CNMs and their derivatives can be also utilized as modulators to further improve the catalytic activity and stability of artificial peroxidase.M any classic artificial peroxidases,f or instance, metal oxides (for example,F e 3 O 4 , FeO x H, [94] Fe 2 O 3 , [95][96][97] Co 3 O 4 , [98][99][100] ZnO, [101] CuO, [102][103][104][105] Cu 2 O, [106] CeO 2 , [92] Co-Fe 2 O 4 , [107,108] and WO 3 [109] ), metal hydroxide, [110] metal chalcogenides (for example,C oSe 2 , [111] CuS, [112,113] and MoS 2 [114] ), metal nanoparticles (for example,P t, [92,[115][116][117][118][119][120][121] Pd, [82,88,122,123] Au, [84,88,[124][125][126][127][128][129][130][131][132][133]…”

Section: Cnms As Modulators In Hybrid Artificial Peroxidasesmentioning

confidence: 99%

Carbon Nanozymes: Enzymatic Properties, Catalytic Mechanism, and Applications

et al. 2018

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Nanozymes have advantages over natural enzymes, such as facile production on large scale, long storage time, low costs, and high stability in harsh environments. Carbon nanomaterials (CNMs), including fullerenes, carbon nanotubes, graphene, carbon quantum dots, and graphene quantum dots, have become a star family in materials science. As a new class of nanozymes, the catalytic activity of CNMs and their hybrids has been extensively reported. In this Minireview, recent progress of CNMs based artificial enzymes, focusing on those with peroxidase-like activity, has been summarized. The enzymatic properties, catalytic mechanisms, and novel applications of CNM nanozymes in sensing, therapy, and environmental engineering are discussed in detail. Additionally, we also highlight the remaining challenges and unsolved problems. With the fast development of bionanotechnology, the unique enzymatic properties and advantages of CNM nanozymes have received much attention and will continue to be an active and challenging field for the years to come.

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Section: Cnms As Modulators In Hybrid Artificial Peroxidasesmentioning

confidence: 99%

Carbon Nanozymes: Enzymatic Properties, Catalytic Mechanism, and Applications

et al. 2018

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“…Along with this, a few new vibrational bands appeared at 630 cm −1 , 570 cm −1 and 480 cm −1 for Fe/GO which were related to Fe-O group of Fe 2 O 3 . Similarly, the bands at 506 cm −1 and 430 cm −1 were related to the Cu-O group of Cu 2 O/CuO for Cu-Fe/GO nanocomposite [28][29][30].…”

Section: Xrd and Ft-ir Analysismentioning

confidence: 84%

Cu–Fe Incorporated Graphene-Oxide Nanocomposite as Highly Efficient Catalyst in the Degradation of Dichlorodiphenyltrichloroethane (DDT) from Aqueous Solution

Nguyen

et al. 2020

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Fe/graphene oxide and Cu–Fe/graphene oxide nanocomposite were synthesized by the atomic implantation method to study the photocatalytic degradation of dichlorodiphenyltrichloroethane (DDT). The synthesized nanocomposites were characterized by the XRD, N2 isotherms, SEM with EDX, TEM and XPS analysis. Characterization results have reported that oxides of Cu and Fe were uniformly distributed on graphene oxide and exited in the form of Cu+ and Fe2+ ions in Cu–Fe/graphene oxide nanocomposite. The high photocatalytic DDT removal efficiency 99.7% was obtained for Cu–Fe/graphene oxide under the optimal condition of 0.2 g/L catalyst, 15 mg/L H2O2 and pH 5. It was attributed to the reduction of Fe3+ to Fe2+ by Cu+ ions and –OH radicals formation. However, it was dropped to 90.4% in the recycling study by leaching of iron and without a change in phase structure and morphology. Graphic Abstract

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“…Recent studies show the maximum power density of the fuel cell has been sufficiently improved by using the metal catalysts on the graphene surface . In the present study, The rGO and rGO−Cu/CuO based nanocomposites were synthesized using chemical methods reported earlier and the electrodes were fabricated using the nanocomposites by drop casting method. The morphology of the nanocomposite was investigated by field emission electron microscopy (FESEM).…”

Section: Resultsmentioning

confidence: 99%

Selection of Graphite Pencil Grades for the Design of Suitable Electrodes for Stacking Multiple Single‐Inlet Paper‐Pencil Fuel Cells

et al. 2019

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We present a single-inlet paper-pencil based microfluidic fuel cell which works on the capillary driven fluid flow of a mixture of fuel (formic acid) and electrolyte (dilute sulfuric acid) solutions as a single entity. Different types of pencils are used to prepare the graphite electrodes to observe their effect on the fuel cell performance. The graphite electrodes are porous and act as a gas diffusion electrode which breaths in oxygen directly from the quiescent air and out CO 2 from the cell. The paper fuel cell also fabricated in different dimensions and connected as cell-stacks to enhance its performance. The paper-pencil device generates maximum open circuit potential of ∼ 2.5 V in series combination and maximum current density of ∼ 82 mA cm À 2 and power density of ∼ 100 mW cm À 2 in parallel combination. Later, rGOÀ Cu/CuO nanocomposite embedded electrodes are used to observe their effect on the device performance.[a] Dr.

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Novel synthesis of a mixed Cu/CuO–reduced graphene oxide nanocomposite with enhanced peroxidase-like catalytic activity for easy detection of glutathione in solution and using a paper strip

Abstract: Mixed copper nanocomposite, Cu/CuO–rGO is prepared through a novel one-step oxidation-reduction reaction between aqueous graphene oxide (GO) and copper(ii) chloride (CuCl2) solutions at ambient temperature and pressure.

Cited by 62 publications

References 49 publications

Carbon Nanozymes: Enzymatic Properties, Catalytic Mechanism, and Applications

Carbon Nanozymes: Enzymatic Properties, Catalytic Mechanism, and Applications

Cu–Fe Incorporated Graphene-Oxide Nanocomposite as Highly Efficient Catalyst in the Degradation of Dichlorodiphenyltrichloroethane (DDT) from Aqueous Solution

Selection of Graphite Pencil Grades for the Design of Suitable Electrodes for Stacking Multiple Single‐Inlet Paper‐Pencil Fuel Cells

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