Facile one-step synthesis of Ag@CeO<sub>2</sub>core–shell nanospheres with efficient catalytic activity for the reduction of 4-nitrophenol

Wang, Yuanyou; Suo, Ying; Xu, Jun; Pang, Huan

doi:10.1039/c6ce02165d

Cited by 43 publications

(12 citation statements)

References 26 publications

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“…The occurrence of electron transfer between Ag and CeO 2 , associated with strengthened interfacial interactions, was responsible for facilitating the uptake of electrons by reactant molecules, as reported elsewhere for Ag@CeO 2 catalyst. 23,53 According to Luches et al, 15 the increase in Ce 3+ concentration along with the amount of small Ag nanoparticles deposited also supported the postulate that part of CeO 2 is reduced by electron transfer. These evidence indicated that the addition of Ce to the precursor alloy modies the electronic structure of Ag and produces an electronic interaction between Ag and CeO 2 .…”

Section: Electrocatalytic Oxidation Of Sodium Borohydride On Ag/ Ceo mentioning

confidence: 83%

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance

Zhang

Song

et al. 2017

RSC Adv.

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Section: Electrocatalytic Oxidation Of Sodium Borohydride On Ag/ Ceo mentioning

confidence: 83%

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance

Zhang

Song

et al. 2017

RSC Adv.

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“…The metallic core–shell alloy nanoparticles are garnering significant interest from the scientific fraternity because of their unique optical, chemical, and physical properties. Various core–shell nanoparticles have been proposed as catalysts for reaction such as Ni@PtNi nanoparticles supported on reduced graphene oxide (rGO), Ag@CeO 2 nanoparticles for the reduction of 4-nitrophenol, Pd@Pt for olefin reduction, Pd@Ag, and Au@Ni nanoparticles for partial hydrogenation of phenylacetylene. Shao’s group has reported Pt–Ni nanoparticles with higher catalytic activity than the available catalyst for oxygen reduction …”

Section: Introductionmentioning

confidence: 99%

Core–Shell Novel Composite Metal Nanoparticles for Hydrogenation and Dye Degradation Applications

Kulkarni

Jadhav

Raikar

et al. 2019

Ind. Eng. Chem. Res.

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Biofriendly green sustainable nanocatalyst Au@NiAg with high catalytic activity was prepared for hydrogenation and degradation of aquatic contaminants such as 4-nitrophenol (4-NP), Methyl Orange (MO), and Orange G (OG). Synthesized Au@Ni nanoparticles have a triangular shape while the Au@NiAg nanoparticles are of spherical shape and of smaller size, attributed to the digestive ripening of the Au@Ni where silver ion was deposited on the host Au@Ni nanoparticle surface. The Au@NiAg nanoparticles catalyzed hydrogenation of 4-nitrophenol and reduction of organic dyes follow Langmuir−Hinshelwood kinetics. The Au@NiAg nanoparticles have shown excellent catalytic activity with activity factors of 3167s -1 g -1 , 5476s -1 g -1 , and 3810 s −1 g −1 for 4-NP, MO, and OG, respectively. Silver nanoparticles act as cocatalyst for overall improvement of the performance of Au@NiAg. Above all the involvement of leaf extract mediated synthesis will open up an area to the production of sustainable, ecofriendlym and nontoxic core−shell nanocatalysts with exemplary catalytic activity.

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“…Additionally, use of a core@shell geometry is of interest, as the metal core can be isolatedeither to prevent reactions, such as silver dissolving, or to promote selectivity by only having the semiconductor as an available active site. There have been studies on Ag/CeO 2 (nano)composites, − but only few studies report on core@shell geometries, − despite their promise as photocatalysts. Silver nanocubes are attractive because of the spatial localization of modes and high | E | 2 enhancement, while preserving a high degree of symmetry.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanocubes Coated in Ceria: Core/Shell Size Effects on Light-Induced Charge Transfer

O'Neill

Prezgot

Ianoul

et al. 2019

ACS Appl. Mater. Interfaces

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Plasmonic sensitization of semiconductors is an attractive approach to increase light-induced photocatalytic performance; one method is to use plasmonic nanostructures in core@shell geometry. The occurrence and mechanism of synergetic effects in photocatalysis of such geometries are under intense debate and proposed to occur either through light-induced charge transfer (CT) or through thermal effects. This study focuses on the relation between the dimensions of Ag@CeO 2 nanocubes, the wavelength-dependent efficiency, and the mechanism of light-induced direct CT. A 4mercaptobenzoic acid (4-MBA) linker between core and shell acts as a Raman probe for CT. For all Ag@CeO 2 nanocubes, CT increases with decreasing excitation wavelength, with notable increase at and below 514 nm. This is fully explainable by CT from silver to the 4-MBA LUMO, with the increase for excitation wavelengths that exceed the Ag/4-MBA LUMO gap of 2.28 eV (543 nm). A second general trend observed is an increase in CT yield with ceria shell thickness, which is assigned to relaxation of the excited electron further into the ceria conduction band, potentially producing defects.

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Facile one-step synthesis of Ag@CeO₂core–shell nanospheres with efficient catalytic activity for the reduction of 4-nitrophenol

Cited by 43 publications

References 26 publications

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance

Core–Shell Novel Composite Metal Nanoparticles for Hydrogenation and Dye Degradation Applications

Silver Nanocubes Coated in Ceria: Core/Shell Size Effects on Light-Induced Charge Transfer

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Facile one-step synthesis of Ag@CeO2core–shell nanospheres with efficient catalytic activity for the reduction of 4-nitrophenol

Cited by 43 publications

References 26 publications

Three-dimensional architecture of Ag/CeO2 nanorod composites prepared by dealloying and their electrocatalytic performance

Three-dimensional architecture of Ag/CeO2 nanorod composites prepared by dealloying and their electrocatalytic performance

Core–Shell Novel Composite Metal Nanoparticles for Hydrogenation and Dye Degradation Applications

Silver Nanocubes Coated in Ceria: Core/Shell Size Effects on Light-Induced Charge Transfer

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Facile one-step synthesis of Ag@CeO₂core–shell nanospheres with efficient catalytic activity for the reduction of 4-nitrophenol

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance

Three-dimensional architecture of Ag/CeO₂ nanorod composites prepared by dealloying and their electrocatalytic performance