Size-controllable gold nanoparticles prepared from immobilized gold-containing ionic liquids on SBA-15

Kusumawati, Etty N.; Nishio–Hamane, Daisuke; Sasaki, Takehiko

doi:10.1016/j.cattod.2017.09.012

Cited by 14 publications

(14 citation statements)

References 47 publications

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“…Thus, the development of synthetic method is essential to control the nanoparticle growth and understand the growth mechanism of nanoparticles on solid support especially on porous materials. Varying the concentrations and feed rates of the reducing agent can be an example of the synthetic strategies in controlling the particles size . A comprehensive understanding of structural properties and morphologies of metal NPs with regards to their effect on the catalytic performances is essentially necessary to achieve optimal control of the reaction performances and obtain the best results of the catalysts.…”

Section: Discussionmentioning

confidence: 99%

“…This result shows that IL can control the particle size on the immobilized samples by creating a certain distance between the monomers during the reduction process. The immobilized imidazolium cations serve as a spacing function to keep the monomers separated due to the charge balance with the Au complex anions …”

Section: Size‐controlled Syntheses Of Metal Nanoparticles On Sba‐15mentioning

confidence: 99%

“…This result shows that AuNPs(1.6 nm)_me‐Im@SBA‐15 has less pore‐blocking and that the small particle size allows the reactants to access almost all active sites inside pore channels, resulting in better catalytic performance. In addition, the catalyst was reusable for at least four recycling processes without a significant decrease in activity …”

Section: Size‐controlled Syntheses Of Metal Nanoparticles On Sba‐15mentioning

confidence: 99%

“…The immobilized imidazolium cations serve as a spacing function to keep the monomers separated due to the charge balance with the Au complex anions. [83] Characterization of the catalysts revealed that the metal atom was coordinated by chloride atoms forming metal chloride complex anion before reduction, whereas the ionic liquid was strongly bonded on the siliceous SBA-15 and the well-ordered mesoporous silica was kept unchanged after the formation of metal nanoparticles. XAFS analysis showed that Au species in AuCl_me-Im@SBA-15 is Au + when immobilized on IL functionalized SBA-15 and was completely reduce to Au 0 in AuNPs_me-Im@SBA-15 after reduction (Figure 9).…”

Section: Size-controlled Syntheses Of Metal Nanoparticles On Sba-15mentioning

confidence: 99%

“…In addition, the catalyst was reusable for at least four recycling processes without a significant decrease in activity. [83] Recently, we reported highly active and reusable Pd catalysts on SBA-15 in the presence of immobilized IL. [88] The PdNPs(2.4 nm)_me-Im@SBA-15 catalyst was active for Suzuki-Miyaura coupling reaction between aryl halides (ArÀ I and ArÀ Br) and phenylboronic acid at room temperature without the need of additional ligand or stabilizer.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

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Metal Nanoparticles Syntheses on Ionic Liquids Functionalized Mesoporous Silica SBA‐15

Kusumawati

Sasaki

2019

The Chemical Record

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Supported metal nanoparticles hold great promise in heterogeneous catalysis as active and reusable catalysts for various organic transformations. Preparation methods of metal nanoparticles with excellent control over size, shape, and morphology on supports has significantly advanced to improve the performances of the resulting catalysts. Here, we aim to discuss the development of supported metal nanoparticles on mesoporous silica SBA‐15 in the presence of immobilized ionic liquids mostly based on examples from the previously reported results. This review highlights the preparation methods for size‐controlled syntheses and the immobilization of metal nanoparticles on solid supports, especially SBA‐15 by various techniques.

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Section: Discussionmentioning

confidence: 99%

Section: Size‐controlled Syntheses Of Metal Nanoparticles On Sba‐15mentioning

confidence: 99%

Section: Size‐controlled Syntheses Of Metal Nanoparticles On Sba‐15mentioning

confidence: 99%

Section: Size-controlled Syntheses Of Metal Nanoparticles On Sba-15mentioning

confidence: 99%

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

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Metal Nanoparticles Syntheses on Ionic Liquids Functionalized Mesoporous Silica SBA‐15

Kusumawati

Sasaki

2019

The Chemical Record

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Biogenic Synthesis of Gold Nanoparticles on a Green Support as a Reusable Catalyst for the Hydrogenation of Nitroarene and Quinoline

Nafiu

Shah

Aziz

et al. 2021

Chemistry An Asian Journal

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Direct attachment of gold nanoparticles to a green support without the use of an external reducing agent and using it for removing toxic pollutants from wastewater, i. e., reduction of nitroarene to amine, are described. A novel approach involving the reduction of gold by the jute plant (Corchorus genus) stem-based (JPS) support itself to form nanoparticles (AuNPs) to be used as a catalytic system ('dipcatalyst') and its catalytic activity for the hydrogenation of series of nitroarenes in aqueous media are presented. AuNPs/ JPS catalyst was characterized using SEM, UV-Vis, FTIR, TEM, XPS, and ICP-OES. Confined area elemental mapping exhibits uniform and homogeneous distribution of AuNPs on the support surface. TEM shows multi-faceted AuNPs in the range of 20-30 nm. The reactivity of AuNPs/JPS for the transfer hydrogenation of nitroarene as well as hydrogenation of quinoline under molecular H 2 pressure was evaluated. Sodium borohydride, when used as the hydrogen source, demonstrates a high catalytic efficiency in the transfer hydrogenation reduction of 4-nitrophenol (4-NP). Quinoline is quantitatively and chemoselectively hydrogenated to 1,2,3,4tetrahydroquinoline (py-THQ) using molecular hydrogen. Reusability studies show that AuNPs are stable on the support surface and their selectivity is not affected.

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Exploring the Potential of Supported Ionic Liquids as Building Block Systems in Catalysis

Kaur

Chopra

2020

ChemistrySelect

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Supported ionic liquid catalysts have gained significant attention in recent years to overcome the limitations of the homogeneous and heterogeneous catalysis. The thin film containing dispersed homogeneous catalyst in the ionic liquid have been immobilized onto various porous solid supports having a high surface area to synthesize supported ionic liquids (SILs) that acted as potential organocatalysts in organic green synthesis. Support materials, ionic liquids, and molecularly dispersed catalysts have played a significant role in increasing the catalytic activity of the SIL catalysts. In the present review, the literature of the last decade concerning the synthesis of SIL catalysts by using different strategies as well as their applications in organic synthesis is incorporated. The main emphasis of the present work is to critically analyze the recent developments in the supported molecular dispersed catalysts (such as lewis acids, organometallic complexes, metal nanoparticles, and chemical functionality associated with cation/ anion of ionic liquids) using ILs and explore their potential to act as building block systems in catalysis.

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Size-controllable gold nanoparticles prepared from immobilized gold-containing ionic liquids on SBA-15

Cited by 14 publications

References 47 publications

Metal Nanoparticles Syntheses on Ionic Liquids Functionalized Mesoporous Silica SBA‐15

Metal Nanoparticles Syntheses on Ionic Liquids Functionalized Mesoporous Silica SBA‐15

Biogenic Synthesis of Gold Nanoparticles on a Green Support as a Reusable Catalyst for the Hydrogenation of Nitroarene and Quinoline

Exploring the Potential of Supported Ionic Liquids as Building Block Systems in Catalysis

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