Synthesis of silver nanoparticles within cross-linked lysozyme crystals as recyclable catalysts for 4-nitrophenol reduction

Liang, Miao; Wang, Libing; Su, Rongxin; Qi, Wei; Wang, Mengfan; Yu, Yang; He, Zhimin

doi:10.1039/c3cy00157a

Cited by 73 publications

(62 citation statements)

References 24 publications

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“…Notably, some Ag NPs enter into the interlayers of the rectorite (as shown in Fig. 4 (b-3) and (c-3)) and their shapes change from sphere to oval due to the confinement effects of the interlayers, this result is in accordance with the previous report that the growth of nanoparticles was inhibited with the template of cross-linked lysozyme crystals [23]. In addition, the diameters of QCAg, QCRAg-3 and QCORAg-3 bionanocomposites are measured to be in the range of 30e65 nm, 20e33 nm and 18e28 nm respectively by counting more than fifty nanoparticles, and the average diameters of QCAg, QCRAg-3 and QCORAg-3 are 45 nm, 26 nm and 22 nm, respectively.…”

Section: Morphology Of Quaternized Carboxymethyl Chitosan/rectorite/ supporting

confidence: 94%

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

Liu

et al. 2015

Materials Chemistry and Physics

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Section: Morphology Of Quaternized Carboxymethyl Chitosan/rectorite/ supporting

confidence: 94%

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

Liu

et al. 2015

Materials Chemistry and Physics

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“…One of the fundamental attractions of metallic nanoparticles is the improvement of catalysts [8,9] due to the obvious increase in the active surface area compared with existing metal particles. As an example, a reduction in Pt content of the Pt-based catalysts would be very interesting in the automotive industry.…”

Section: Bimetallic Nanoparticles As Catalystsmentioning

confidence: 99%

On Metal Segregation of Bimetallic Nanocatalysts Prepared by a One-Pot Method in Microemulsions

2017

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A comparative study on different bimetallic nanocatalysts prepared from microemulsions using a one-pot method has been carried out. The analysis of experimental observations, complemented by simulation studies, provides detailed insight into the factors affecting nanoparticle architecture: (1) The metal segregation in a bimetallic nanocatalysts is the result of the combination of three main kinetic parameters: the reduction rate of metal precursors (related to reduction standard potentials), the material intermicellar exchange rate (determined by microemulsion composition), and the metal precursors concentration; (2) A minimum difference between the reduction standard potentials of the two metals of 0.20 V is needed to obtain a core-shell structure. For values ∆ε 0 smaller than 0.20 V the obtaining of alloys cannot be avoided, neither by changing the microemulsion nor by increasing metal concentration; (3) As a rule, the higher the film flexibility around the micelles, the higher the degree of mixture in the nanocatalyst; (4) A minimum concentration of metal precursors is required to get a core-shell structure. This minimum concentration depends on the microemulsion flexibility and on the difference in reduction rates.

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“…The amount of the total silver used to obtain this rate constant is 2.70 × 10 −4 g. While such catalytic applications of noble metal nanoparticles are mostly reported with rather smaller particulated nanomaterials (diameter < 100 nm), [22][23][24] it is notable that several larger silver nanostructures (diameter > 200 nm) also exhibit similar catalytic properties as demonstrated in this work. 18,25,26 In particular, the large surface area of the bumpy nanostructures would be highly attractive as efficient heterogeneous catalyst.…”

mentioning

confidence: 48%

Synthesis of Large Bumpy Silver Nanostructures with Controlled Sizes and Shapes for Catalytic Applications

Oh¹,

Kim²,

Lee³

2014

Bulletin of the Korean Chemical Society

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We have synthesized disc-like large silver nanomaterials that have nanostructured bumps on the surface using smaller nanoplate seeds. The size and shape of the bumpy nanostructures are rationally controlled by changing the concentrations of nanoplate seeds, silver ion, reductant, and citrate ion. Importantly, the synthetic mechanism of these bumpy nanostructures is remarkably similar to that of the conventional seed-mediated growth based on tiny seeds. We have further investigated the catalytic properties of the bumpy nanostructures for the reduction of 4-nitrophenol, which is associated with a concomitant color change from yellow to colorless.

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Synthesis of silver nanoparticles within cross-linked lysozyme crystals as recyclable catalysts for 4-nitrophenol reduction

Cited by 73 publications

References 24 publications

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

On Metal Segregation of Bimetallic Nanocatalysts Prepared by a One-Pot Method in Microemulsions

Synthesis of Large Bumpy Silver Nanostructures with Controlled Sizes and Shapes for Catalytic Applications

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