Chemistry in supercritical fluids for the synthesis of metal nanomaterials

Xu, Yu; Musumeci, Valentina; Aymonier, Cyril

doi:10.1039/c9re00290a

Cited by 39 publications

(20 citation statements)

References 272 publications

(397 reference statements)

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“…Catalysts 2a 1-6 were prepared from Pd(acac) 2 and catalyst 2b from Pd(hfacac) 2 in supercritical fluid flow conditions using acetone as solvent [29]. The synthesis system consists of injecting the acetone solution (200 mL, 10 mmol L −1 of Pd, 5 mmol L −1 for 2a 4 ) using a HPLC pump into a reactor (1/8" tubing, 540 cm, 7.17 cm 3 ) heated at 300 • C.…”

Section: Procedures For Synthesis Of Catalystsmentioning

confidence: 99%

Investigating (Pseudo)-Heterogeneous Pd-Catalysts for Kraft Lignin Depolymerization under Mild Aqueous Basic Conditions

Bourbiaux

Burel

et al. 2021

Catalysts

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Lignin is one of the main components of lignocellulosic biomass and corresponds to the first renewable source of aromatic compounds. It is obtained as a by-product in 100 million tons per year, mainly from the paper industry, from which only 2–3% is upgraded for chemistry purposes, with the rest being used as an energy source. The richness of the functional groups in lignin makes it an attractive precursor for a wide variety of aromatic compounds. With this aim, we investigated the Pd-catalyzed depolymerization of lignin under mild oxidizing conditions (air, 150 °C, and aqueous NaOH) producing oxygenated aromatic compounds, such as vanillin, vanillic acid, and acetovanillone. Palladium catalysts were implemented following different strategies, involving nanoparticles stabilized in water, and nanoparticles were supported on TiO2. Significant conversion of lignin was observed in all cases; however, depending on the catalyst nature and the synthetic methods, differences were observed in terms of selectivity in aromatic monomers, mainly vanillin. All these aspects are discussed in detail in this report, which also provides new insights into the role that Pd-catalysts can play for the lignin depolymerization mechanism.

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Section: Procedures For Synthesis Of Catalystsmentioning

confidence: 99%

Investigating (Pseudo)-Heterogeneous Pd-Catalysts for Kraft Lignin Depolymerization under Mild Aqueous Basic Conditions

Bourbiaux

Burel

et al. 2021

Catalysts

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“…In recent years, supercritical carbon dioxide has been widely used in the preparation of nanomaterials. Examples include (1) the synthesis and CO 2 -assisted synthesis of monodispersed metal NPs, (2) micelles dispersed in supercritical CO 2 as ‘nano-reactors’ for the growth of metal NPs, (3) the template growth of robust metal nanostructures, and (4) the deposition and immobilization of metal NPs on porous supports as composites [ 35 ].…”

Section: Hot Issues and Future Trendsmentioning

confidence: 99%

A Bibliometric Analysis and Review of Supercritical Fluids for the Synthesis of Nanomaterials

Zhang

Xing

et al. 2021

Nanomaterials

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Since the 1990s, supercritical fluids for the synthesis of nanomaterials have been paid more and more attention by researchers and have gradually become one of the most important ways to prepare nanomaterials. In this study, literature data on “supercritical fluids for the synthesis of nanomaterials” from 1998 to 2020 were obtained from the Web of Science database, and the data were processed and analyzed by the bibliometric method combined with Microsoft office 2019, Origin 2018, VOSviewer, and other software, so as to obtain the research status and development trend of “supercritical fluids for the synthesis of nanomaterials”. The results show that since literature on “supercritical fluids for the synthesis of nanomaterials” appeared for the first time in 1998, the number of articles published every year has risen. In terms of this field, China has become the second-largest publishing country after the United States, and China and the United States display a lot of cooperation and exchanges in this field. “Supercritical CO2”, “supercritical water”, “supercritical antisolvent”, “surface modification”, and so on have become the research hotspots of “supercritical fluids for the synthesis of nanomaterials”.

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“…No caso particular da síntese de nanopartículas, especialmente nanopartículas metálicas, a capacidade extraordinária do CO 2 em conseguir penetrar e difundir--se por entre os poros dos materiais de partida, possibilita a deposição de nanopartículas com uma elevada dispersividade e controlo das propriedades morfológicas (ex. porosidade, densidade), algo que através das vias convencionais é muito difícil de conseguir controlar, garantindo uma boa reprodutibilidade [13][14][15].…”

Section: Vantagens Do Counclassified

Dióxido de Carbono Supercrítico: Uma Alternativa para uma Síntese Mais Sustentável

Pires¹

2021

BSPQuimica

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In addition to being thermodynamically stable, chemically inert under many conditions, non-toxic and non-flammable, carbon dioxide has unique properties that make it very suitable to be used as a supercritical fluid. During the past few years, several reactions have been explored using the properties of supercritical CO 2 (scCO 2 ). In this article, not only the advantages of using scCO 2 will be presented, but also some reactions where scCO 2 has been explored as sustainable alternative synthetic route.

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Chemistry in supercritical fluids for the synthesis of metal nanomaterials

Abstract: The supercritical flow synthesis of metal nanomaterials is sustainable and scalable for the efficient production of materials.

Cited by 39 publications

References 272 publications

Investigating (Pseudo)-Heterogeneous Pd-Catalysts for Kraft Lignin Depolymerization under Mild Aqueous Basic Conditions

Investigating (Pseudo)-Heterogeneous Pd-Catalysts for Kraft Lignin Depolymerization under Mild Aqueous Basic Conditions

A Bibliometric Analysis and Review of Supercritical Fluids for the Synthesis of Nanomaterials

Dióxido de Carbono Supercrítico: Uma Alternativa para uma Síntese Mais Sustentável

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