Improved binding between copper and carbon nanotubes in a composite using oxygen-containing functional groups

Park, Mina; Kim, Byung-Hyun; Kim, Sanghak; Han, Do-Suck; Kim, Gunn; Lee, Kwang-Ryeol

doi:10.1016/j.carbon.2010.10.019

Cited by 134 publications

(78 citation statements)

References 40 publications

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“…4,8−10 Previous theoretical calculations demonstrated that the chemically active oxygen in the functionalized CNT surfaces can enhance the binding of Cu with carbon nanomaterials by promoting the electron exchange between Cu and carbon atoms or directly interacting with Cu. 26 Such reactions between the divalent metal cations with the oxidized nanostructures can lead to the release of H + ions into the water, slightly decreasing the solution pH, which was observed in some experiments. 27 Besides the presence of oxygen functional groups, recent studies revealed that the intrinsic wrinkles on graphene nanosheets can induce inhomogeneities in the charge distribution so that concentrated charges are located at the wrinkles, thus resulting in more energetically favorable regions for the adsorption of diverse molecules.…”

Section: Resultsmentioning

confidence: 93%

Removal of Copper Ions from Aqueous Solutions via Adsorption on Carbon Nanocomposites

Dichiara

Webber

Gorman

et al. 2015

ACS Appl. Mater. Interfaces

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The development of technologies for water purification is critical to meet the global challenges of insufficient water supply and inadequate sanitation. Among all wastewater treatments, adsorption is globally recognized as the most promising method because of its versatility and economic feasibility. Herein, the removal of copper ions (Cu(II)) from aqueous solutions through adsorption on free-standing hybrid papers comprised of a mixture between graphene and different types of carbon nanotubes (CNTs) was examined. Results indicate that the rate of adsorption and long-time capacity of the metal ions on the nanocomposites significantly exceeds that of activated carbon by a factor of 4. Moreover, the combination of graphene with CNTs endows an increase in the uptake of Cu(II) up to 50% compared to that of CNTs alone, with a maximum adsorption capacity higher than 250 mg·g(-1). The removal of Cu(II) from water is sensitive to solution pH, and the presence of oxygen functional groups on the adsorbent surface promotes higher adsorption rates and capacities than pristine materials. These hybrid nanostructures show great promise for environmental remediation efforts, wastewater treatments, and separation applications, and the results presented in this study have important implications for understanding the interactions of carbonaceous materials at environmental interfaces.

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Section: Resultsmentioning

confidence: 93%

Removal of Copper Ions from Aqueous Solutions via Adsorption on Carbon Nanocomposites

Dichiara

Webber

Gorman

et al. 2015

ACS Appl. Mater. Interfaces

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“…Many researches have shown that a close interface can be established between MWCNTs and matrix through the surface of MWCNTs modified by various oxygen-containing functional groups such as carboxyl (-COOH), hydroxyl (-OH), and atomic oxygen (-O) [22,25,26]. They also found O atoms have a beneficial effect on the interface strength at the interface between the MWCNTs and the metal [22,[27][28][29].…”

Section: Distribution Of O Atoms and Its Effect On Mechanical Propertmentioning

confidence: 99%

“…Figure 9 shows the SEM image of 3 vol% Cu-coated MWCNTs/Zn composite and the element maps of Zn, C, O, and Cu. The elemental maps of O atoms and C atoms are homologous, indicating that the distribution of O atoms does not exhibit great variety during ED and SPS process, O atoms still exists in the sintering composites [25]. Oxygen is formed on the surface of MWCNTs during the pretreatment process ( figure 1(b)), and C-O and C=O are chemically bonded during ED ( figure 4).…”

Section: Distribution Of O Atoms and Its Effect On Mechanical Propertmentioning

confidence: 99%

Microstructure and mechanical properties of zinc matrix composites reinforced with copper coated multiwall carbon nanotubes

Peng

Zhang

et al. 2020

Mater. Res. Express

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Zinc alloy has been considered as a promising candidate for orthopedic implants due to its suitable degradation rate and good biocompatibility. However, its mechanical properties still have to be optimized. Metal matrix composites (MMC) are an effective way to improve the mechanical properties of zinc alloy. In this study, pure zinc as matrix, Cu-coated multiwall carbon nanotubes (MWCNTs) were used as reinforcement, and MWCNTs/Zn composites were successfully prepared by combining the use of electroless deposition (ED), spark plasma sintering (SPS), and hot-rolling techniques. The results show that MWCNTs are uniformly dispersed in the zinc matrix and a tight interface is formed between the MWCNTs and the zinc matrix. As the content of the MWCNTs increases, the mechanical properties of the MWCNTs/Zn composites gradually increase. The Cu-coated MWCNTs/Zn composites have higher mechanical properties than uncoated Cu. 3 vol% Cu-coated MWCNTs/Zn composite has a highest ultimate tensile strength of 281 MPa, but the elongation is only 4%. Load transfer effect and fine grain strengthening are two main strengthening mechanisms of MWCNTs/Zn composites. This research provides a new method for the design and preparation of MWCNTs/Zn composites.

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“…This fact is explained by the presence of various structural graphene forms defects [11], their radical impact on reducing the thermal conductivity of composites. The special role of Cu-C interface -due to the lack of chemical affinity between the copper and carbon -is often emphasized, because it makes difficult the heat flux in the composite [12]. In summary, thermal conductivity of copper matrix composites reinforced by graphene forms is dependent on: the quality of the carbon forms, homogeneity of the mixture components, quantitative volumetric relationship copper to graphene and selection of the sintering method.…”

Section: Introductionmentioning

confidence: 99%

Copper-Carbon Nanoforms Composites – Processing, Microstructure and Thermal Properties

Pietrzak

Gładki

Frydman

et al. 2017

Archives of Metallurgy and Materials

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The main current of publication is focused around the issues and problems associated with the formation of composite materials with Cu matrix and reinforcing phases in the various carbon nanoforms. The core of the research has been focused on thermal conductivity of these composites types. This parameter globally reflects the state of the structure, quality of raw materials and the technology used during the formation of composite materials. Vanishingly low affinity of copper for carbon, multilayered forms of graphene, the existence of critical values of graphene volume in the composite are not conducive to the classic procedures of composites designing. As a result, the expected, significant increase in thermal conductivity of composites is not greater than for pure copper matrix. Present paper especially includes: (i) data of obtaining procedure of copper/graphene mixtures, (ii) data of sintering process, (iii) the results of structure investigations and of thermal properties. Structural analysis revealed the homogenous distribution of graphene in copper matrix, the thermal analysis indicate the existence of carbon phase critical concentration, where improvement of thermal diffusivity to pure copper can occur.

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Improved binding between copper and carbon nanotubes in a composite using oxygen-containing functional groups

Cited by 134 publications

References 40 publications

Removal of Copper Ions from Aqueous Solutions via Adsorption on Carbon Nanocomposites

Removal of Copper Ions from Aqueous Solutions via Adsorption on Carbon Nanocomposites

Microstructure and mechanical properties of zinc matrix composites reinforced with copper coated multiwall carbon nanotubes

Copper-Carbon Nanoforms Composites – Processing, Microstructure and Thermal Properties

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