Gold microcrystal synthesis via reduction of HAuCl4 by cellulose in the ionic liquid 1-butyl-3-methyl imidazolium chloride

Li, Zhonghao; Friedrich, Alwin; Taubert, Andreas

doi:10.1039/b716135m

Cited by 123 publications

(80 citation statements)

References 51 publications

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“…[157] Taubert and co-workers fabricated Au microcrystals via the reduction of HAuCl 4 with cellulose in [BMim][Cl], and systematically studied the influences of reaction temperature and cellulose concentration on particle morphologies. [158] In another work, Qi and co-workers fabricated threefold symmetrical gold dendrites by the reaction between a Zn plate and a solution of HAuCl 4 in [BMim][PF 6 ] (Fig. 2c).…”

Section: Formation Of Different Morphologiesmentioning

confidence: 99%

Preparation of Inorganic Materials Using Ionic Liquids

2009

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Conventional synthesis of inorganic materials relies heavily on water and organic solvents. Alternatively, the synthesis of inorganic materials using, or in the presence of, ionic liquids represents a burgeoning direction in materials chemistry. Use of ionic liquids in solvent extraction and organic catalysis has been extensively studied, but their use in inorganic synthesis has just begun. Ionic liquids are a family of non-conventional molten salts that can act as templates and precursors to inorganic materials, as well as solvents. They offer many advantages, such as negligible vapor pressures, wide liquidus ranges, good thermal stability, tunable solubility for both organic and inorganic molecules, and much synthetic flexibility. In this Review, the use of ionic liquids in the preparation of several categories of inorganic and hybrid materials (i.e., metal structures, non-metal elements, silicas, organosilicas, metal oxides, metal chalcogenides, metal salts, open-framework structures, ionic liquid-functionalized materials, and supported ionic liquids) is summarized. The status quo of the research field is assessed, and some future perspectives are furnished.

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Section: Formation Of Different Morphologiesmentioning

confidence: 99%

Preparation of Inorganic Materials Using Ionic Liquids

2009

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“…All polymer-containing samples show a first weight loss of 10% (anion-based samples) or 13% (cation and zwitterion-based samples) until 140 • C. This initial loss is due to water desorption. Up to 290 • C, a further weight loss of 23% (anion-based samples) or 17% (cation and zwitterion-based samples) is likely due to a set of overlapping processes such as further weight loss due to hydrogen phosphate condensation and a rather complex multistep degradation of the cellulose-based polymer additive [61]. The last significant weight loss of 6%-7% for all polymer-containing samples up to 550 • C is due to charring of the polymer and possibly the beginning of pyrophosphate formation in the same temperature range [62].…”

Section: Figurementioning

confidence: 99%

Water-Soluble Cellulose Derivatives Are Sustainable Additives for Biomimetic Calcium Phosphate Mineralization

et al. 2016

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Abstract:The effect of cellulose-based polyelectrolytes on biomimetic calcium phosphate mineralization is described. Three cellulose derivatives, a polyanion, a polycation, and a polyzwitterion were used as additives. Scanning electron microscopy, X-ray diffraction, IR and Raman spectroscopy show that, depending on the composition of the starting solution, hydroxyapatite or brushite precipitates form. Infrared and Raman spectroscopy also show that significant amounts of nitrate ions are incorporated in the precipitates. Energy dispersive X-ray spectroscopy shows that the Ca/P ratio varies throughout the samples and resembles that of other bioinspired calcium phosphate hybrid materials. Elemental analysis shows that the carbon (i.e., polymer) contents reach 10% in some samples, clearly illustrating the formation of a true hybrid material. Overall, the data indicate that a higher polymer concentration in the reaction mixture favors the formation of polymer-enriched materials, while lower polymer concentrations or high precursor concentrations favor the formation of products that are closely related to the control samples precipitated in the absence of polymer. The results thus highlight the potential of (water-soluble) cellulose derivatives for the synthesis and design of bioinspired and bio-based hybrid materials.

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“…The gold particle morphologies and sizes mainly depend on the reaction temperature. With this route plates with a thickness from 300 nm at 110 • C to 800 nm at 200 • C were synthesized [83].…”

Section: Chemical Reductionmentioning

confidence: 99%

Ionic Liquids for the Synthesis and Stabilization of Metal Nanoparticles

Janiak

2013

Zeitschrift Für Naturforschung B

131

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The synthesis and stabilization of metal nanoparticles (M-NPs) from metals, metal salts, metal complexes and metal carbonyls in ionic liquids (ILs) is reviewed. The electrostatic and steric properties of ionic liquids allow for the stabilization of M-NPs without the need of additional stabilizers, surfactants or capping ligands. The synthesis of M-NPs in ILs can be carried out by chemical or electroreduction, thermolysis and photochemical methods including decomposition by microwave or sono-/ultrasound irradiation. Gas-phase syntheses can use sputtering, plasma/glow-discharge electrolysis and physical vapor deposition or electron beam and γ-irradiation. Metal carbonyl precursors M x (CO) y contain the metal atoms already in the zero-valent oxidation state needed for M-NPs so that no extra reducing agent is necessary. Microwave-induced thermal decomposition of precursors in ILs is a rapid and energy-saving access to M-NPs because of the significant absorption efficiency of ILs for microwave energy due to their ionic charge, high polarity and high dielectric constant. M-NP/IL dispersions can be applied in catalytic reactions, e. g., in C-C coupling or hydrogenation catalysis.

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Gold microcrystal synthesis via reduction of HAuCl4 by cellulose in the ionic liquid 1-butyl-3-methyl imidazolium chloride

Cited by 123 publications

References 51 publications

Preparation of Inorganic Materials Using Ionic Liquids

Preparation of Inorganic Materials Using Ionic Liquids

Water-Soluble Cellulose Derivatives Are Sustainable Additives for Biomimetic Calcium Phosphate Mineralization

Ionic Liquids for the Synthesis and Stabilization of Metal Nanoparticles

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