Magnetic yolk–shell mesoporous silica microspheres with supported Au nanoparticles as recyclable high-performance nanocatalysts

Qin, Yuwen; Zhang, Yu; Wang, Chun; Wang, Xiqing; Sun, Zhenkun; Hou, Xiu‐Feng; Zhao, Dongyuan; Deng, Yonghui

doi:10.1039/c4ta06967f

Cited by 134 publications

(67 citation statements)

References 61 publications

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“…Much effort has been devoted to resolving the stability issue of nanoparticle-based catalysts. [2] Generally, nanoparticles were dispersed onto/into the solid supports to impede the sintering of nanoparticles under high-temperature environments. [3] Considering the diffusion limitation of bulk derivatives, mesoscale catalyst supports with high surface area were usually preferred for practical uses.…”

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confidence: 99%

Encapsulating Palladium Nanoparticles Inside Mesoporous MFI Zeolite Nanocrystals for Shape‐Selective Catalysis

et al. 2016

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Pd nanoparticles were successfully encapsulated inside mesoporous silicalite-1 nanocrystals (Pd@mnc-S1) by a one-pot method. The as-synthesized Pd@mnc-S1 with excellent stability functioned as an active and reusable heterogeneous catalyst. The unique porosity and nanostructure of silicalite-1 crystals endowed the Pd@mnc-S1 material general shape-selectivity for various catalytic reactions, including selective hydrogenation, oxidation, and carbon-carbon coupling reactions.

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confidence: 99%

Encapsulating Palladium Nanoparticles Inside Mesoporous MFI Zeolite Nanocrystals for Shape‐Selective Catalysis

et al. 2016

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“…In the hard-template method, the inner templates are selectively removed by making use of one certain solvent or calcination [16][17][18]. In the soft-template method, the synthesis process of the yolk-shell micro/nanostructures is controlled by the soft templates such as micelles, vesicles or a microemulsion formed by surfactants [19][20][21][22]. The mixed surfactant systems often show synergistic behavior, resulting in higher cloud points and lower Krafft points than single surfactant.…”

Section: Introductionmentioning

confidence: 99%

Mixed surfactant controlled syntheses of solid Ni2P and yolk–shell Ni12P5 via a hydrothermal route and their photocatalytic properties

Liu

Yang

Tong

2015

Journal of Alloys and Compounds

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“…[30][31][32] The formed MSS has perpendicularly aligned mesopore channels with pore sizes of ca. 3-4 nm, and its thickness is ca.…”

Section: 27mentioning

confidence: 99%

“…28,29 Then, the MSS with tunable shell thickness and perpendicularly aligned mesopore channels is formed on the surface of the RF layer via an organic-inorganic self-assembly process. [30][31][32] Such dendritic porous yolk@noble metal (Au or Pt) NPs@MSS nanomaterials are nally subjected to calcination in air at high temperatures to remove all organic species. SEM and TEM images are used to monitor every stage of the synthesis process.…”

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confidence: 99%

Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability

Zhao

Luan

et al. 2017

J. Mater. Chem. A

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One of the major challenges in heterogeneous catalysis is how to suppress the aggregation of thermodynamically unstable noble metal nanoparticles (NPs) and simultaneously maintain their high accessibility. Here we report the fabrication of integrated functional nanostructures consisting of a dendritic porous silica yolk with many small noble metal NPs and a protective mesoporous silica shell (MSS) with perpendicularly aligned pore channels and tunable shell thickness by using a well-controlled interfacial engineering strategy. Three-dimensional (3D) dendrimer-like superstructures with many permeable center-radial large pore channels and a highly accessible internal surface area, named dendritic porous silica spheres (DPSSs), serve as unique yolks not only because of their capability to accommodate high density ultrafine Au or Pt NPs, but also their functionality to act as robust physical barriers to separate and confine the aforementioned loaded NPs, which result in slowing down their aggregation at high temperatures due to Ostwald ripening. These integrated hierarchical structures also ensure good stability under weak basic and acidic conditions. Due to their superior structural properties, the DPSSs@noble metal NPs@MSS yolk-shell structures exhibit excellent catalytic performance in p-nitrophenol reduction, epoxidation reaction and CO oxidation. The favorable stability and high catalytic performance of these yolk-shell structures make the developed design strategy very useful for the fabrication of novel highly active and stable catalysts.

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Magnetic yolk–shell mesoporous silica microspheres with supported Au nanoparticles as recyclable high-performance nanocatalysts

Abstract: Multifunctional yolk–shell microspheres are synthesized through a combined interfacial sol–gel coating and surfactant-templating co-assembly method and are demonstrated as efficient and easily recyclable nanocatalysts for catalytic epoxidation of styrene.

Cited by 134 publications

References 61 publications

Encapsulating Palladium Nanoparticles Inside Mesoporous MFI Zeolite Nanocrystals for Shape‐Selective Catalysis

Encapsulating Palladium Nanoparticles Inside Mesoporous MFI Zeolite Nanocrystals for Shape‐Selective Catalysis

Mixed surfactant controlled syntheses of solid Ni2P and yolk–shell Ni12P5 via a hydrothermal route and their photocatalytic properties

Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability

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