Reduced graphene oxide/nickel nanocomposites: facile synthesis, magnetic and catalytic properties

Ji, Zhenyuan; Shen, Xiaoping; Zhu, Guoxing; Zhou, Hu; Yuan, Aihua

doi:10.1039/c2jm14680k

Cited by 274 publications

(147 citation statements)

References 65 publications

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“…study, the catalytic properties of HRG/Ni nanocomposites were used for the reduction of pnitrophenol into p-aminophenol. 463 The stable magnetic behavior of the HRG/Ni nanocomposites has been utilized for the removal of adsorbed organic dyes from water. 464 HRG/Pd nanocomposites were applied as chemical catalyst for organic reactions.…”

Section: Conventional Catalysismentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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Section: Conventional Catalysismentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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“…[40][41][42][43][44] The high activity arises from the synergistic effect of carbon matrix and embedded Ni NPs, explained as follows: (1) carbon layers has high adsorption ability towards 4-NP via p-p stacking interactions. This provides a high concentration of 4-NP near to the Ni nanoparticles embedded in carbon matrix, leading to highly efficient contact between them; and (2) the synergistic effect of Ni nanocrystals and well-graphitized carbon matrix, facilitating the uptake of electrons by 4-NP molecules.…”

Section: -7mentioning

confidence: 99%

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

et al. 2018

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Hollow hierarchical Ni@C nanocomposites with highly dispersed Ni nanoparticles (NPs) embedded in wellgraphitized carbon matrix have been synthesized by solid-state pyrolysis of simple, well-defined organicinorganic layered nickel hydroxide. The integration of highly dispersed Ni NPs, high Ni NPs content (up to $88.01 wt%), well-graphitized carbon as well as strong Ni/carbon interaction in the Ni@C make them display excellent catalytic activity and stable magnetic recyclability toward the reduction of 4-nitrophenol by NaBH 4 .The development of more efficient and stable catalysts has been an increasingly important goal for chemists and materials scientists for both economic and environmental reasons. As efficient and cost-effective non-noble metal, Ni NPs have attracted much attention owing to their potential applications in electronic or optical materials, as well as in catalysis.1-3 In general, the overall performance of Ni NPs depends heavily upon the size, shape and dispersion. It is widely accepted that a higher catalytic activity can be achieved by increasing the surface area of the specic active phase of the catalysts through reducing the size of the corresponding catalytic particles. 4-7However, due to their high surface area to volume ratio, Ni NPs are typically unstable and tend to sinter into larger species, especially at high metal contents, which results in a dramatic decrease in catalytic activity and selectivity. It is thus highly important to prepare stable Ni NPs with uniform dispersion and narrow size distribution to promote their catalytic activities.Over the past decades, embedding of Ni NPs inside the porous supports has been proved to enhance catalytic activity and impede nanoparticle sintering. [8][9][10][11][12][13][14][15] The advantages of carbon supports with respect to conventional oxidic supports, like silica and zirconia, involve the high specic surface area, high stability, intrinsic high electrical conductivity, as well as easy recovery of metal active phases from spent catalysts by burning away carbon. To date, various methods for preparing carbon-supported Ni NPs have been developed. [16][17][18][19][20][21][22] In particular, incipient wetness impregnation and coprecipitation are commonly used methods to prepare these supported catalysts. It is well known that traditional carbons (including activated carbon, carbon nanotubes, graphene and carbon nanobers) are poor in functional groups and a complex functionalization pre-treatment (such as acid oxidation, ionic liquid linking or polymer wrapping) is always required. In addition, the excess reducing regents are also needed for the reduction of Ni NPs. Although a high dispersion of Ni NPs on porous carbon can be achieved by employing this methods, this tedious post-synthetic method renders instable catalysts with dispersed Ni NPs on the external surface or near pore mouths and Ni NPs still have a tendency to be sintered, especially at high metal loading or high temperature, resulting in a signicant loss of reactivity because of...

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“…[59][60][61] In a typical synthesis of the Ag 2 O/GO nanocomposites, PVP (2 g) and a certain amount of graphite oxide were dispersed in DI water (100 mL) by sonication for about 30 min. Subsequently, CH 3 COOAg (0.5 g) was added to the above system.…”

Section: Methodsmentioning

confidence: 99%

Graphene Oxide Modified Ag₂O Nanocomposites with Enhanced Photocatalytic Activity under Visible‐Light Irradiation

Shen

Yang

et al. 2013

Eur J Inorg Chem

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Owing to its unique two-dimensional structure and extraordinary physicochemical properties, graphene oxide (GO) is considered an ideal support for developing highly efficient photocatalysts. In this study, a novel Ag 2 O/GO nanocomposite, as a visible-light-induced photocatalyst, has been fabricated by a simple solution route. The electrostatic interactions between positively charged Ag + and negatively charged GO sheets are responsible for the formation of the Ag 2 O/GO nanocomposite. The anchoring of the Ag 2 O nanoparticles on the GO nanosheets was confirmed by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The photocatalytic degradation of Methylene Blue (MB) under visible-light irradiation was

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Reduced graphene oxide/nickel nanocomposites: facile synthesis, magnetic and catalytic properties

Cited by 274 publications

References 65 publications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

Graphene Oxide Modified Ag₂O Nanocomposites with Enhanced Photocatalytic Activity under Visible‐Light Irradiation

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Reduced graphene oxide/nickel nanocomposites: facile synthesis, magnetic and catalytic properties

Cited by 274 publications

References 65 publications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

Graphene Oxide Modified Ag2O Nanocomposites with Enhanced Photocatalytic Activity under Visible‐Light Irradiation

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Graphene Oxide Modified Ag₂O Nanocomposites with Enhanced Photocatalytic Activity under Visible‐Light Irradiation