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Xu Y, Musumeci V, Aymonier C. Chemistry in supercritical fluids for the synthesis of metal nanomaterials. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00290a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The supercritical flow synthesis of metal nanomaterials is sustainable and scalable for the efficient production of materials.
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Affiliation(s)
- Yu Xu
- CNRS
- Univ. Bordeaux
- 33600 Pessac
- France
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Zhang J, Peng L, Han B. Amphiphile self-assemblies in supercritical CO2 and ionic liquids. SOFT MATTER 2014; 10:5861-5868. [PMID: 25000970 DOI: 10.1039/c4sm00890a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Supercritical (sc) CO2 and ionic liquids (ILs) are very attractive green solvents with tunable properties. Using scCO2 and ILs as alternatives of conventional solvents (water and oil) for forming amphiphile self-assemblies has many advantages. For example, the properties and structures of the amphiphile self-assemblies in these solvents can be easily modulated by tuning the properties of solvents; scCO2 has excellent solvation power and mass-transfer characteristics; ILs can dissolve both organic and inorganic substances and their properties are designable to satisfy the requirements of various applications. Therefore, the amphiphile self-assemblies in scCO2 and ILs have attracted considerable attention in recent years. This review describes the advances of using scCO2 or/and ILs as amphiphile self-assembly media in the last decade. The amphiphile self-assemblies in scCO2 and ILs are first reviewed, followed by the discussion on combination of scCO2 and ILs in creating microemulsions or emulsions. Some future directions on the amphiphile self-assemblies in scCO2 and ILs are highlighted.
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Affiliation(s)
- Jianling Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, China.
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Kaur R, Mehta S. Self aggregating metal surfactant complexes: Precursors for nanostructures. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.12.014] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Saunders SR, Roberts CB. Nanoparticle separation and deposition processing using gas expanded liquid technology. Curr Opin Chem Eng 2012. [DOI: 10.1016/j.coche.2011.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Mohamed A, Trickett K, Chin SY, Cummings S, Sagisaka M, Hudson L, Nave S, Dyer R, Rogers SE, Heenan RK, Eastoe J. Universal surfactant for water, oils, and CO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:13861-13866. [PMID: 20687576 DOI: 10.1021/la102303q] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A trichain anionic surfactant sodium 1,4-bis(neopentyloxy)-3-(neopentyloxycarbonyl)-1,4-dioxobutane-2-sulfonate (TC14) is shown to aggregate in three different types of solvent: water, heptane, and liquid CO(2). Small-angle neutron scattering (SANS) has been used to characterize the surfactant aggregates in water, heptane, and dense CO(2). Surface tension measurements, and analyses, show that the addition of a third branched chain to the surfactant structural template is critical for sufficiently lowering the surface energy, tipping the balance between a CO(2)-incompatible surfactant (AOT) and CO(2)-philic compounds that will aggregate to form micelles in dense CO(2) (TC14). These results highlight TC14 as one of the most adaptable and useful surfactants discovered to date, being compatible with a wide range of solvent types from high dielectric polar solvent water to alkanes with low dielectrics and even being active in the uncooperative and challenging solvent environment of liquid CO(2).
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Affiliation(s)
- Azmi Mohamed
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
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Hsieh HT, Chin WK, Tan CS. Facile synthesis of silver nanoparticles in CO2-expanded liquids from silver isostearate precursor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10031-10035. [PMID: 20297774 DOI: 10.1021/la100147c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This approach provides a new technique to synthesize silver nanoparticles (AgNPs) using CO(2)-expanded liquids (CXLs) as the processing medium. A soluble form of silver carboxylate, silver isostearate (AgISt), was synthesized and characterized. The XRD and DSC analyses indicated that the methylated branched alky chains in AgISt exhibited a steric hindrance to impede the growth of layered structure of AgISt molecules, which led to the high solubility of AgISt in nonpolar solvents. By using AgISt as silver precursor, AgNPs of 2.64 +/- 0.51 nm in diameter were synthesized in CO(2)-expanded heptane with H(2) as the reducing agent. The ATR-FTIR analysis showed that the produced AgNPs were capped with isostearic acid, which was derived from the reduction of AgISt. Hence, the isostearic acid capped AgNPs were well-dispersed in heptane to form a stable silver organosol.
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Affiliation(s)
- Hsien-Te Hsieh
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
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Trickett K, Xing D, Eastoe J, Enick R, Mohamed A, Hollamby MJ, Cummings S, Rogers SE, Heenan RK. Hydrocarbon metallosurfactants for CO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4732-4737. [PMID: 19957945 DOI: 10.1021/la903690c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Cobalt and nickel salts of the highly branched trichain anionic surfactant sodium 1,4-bis(neopentyloxy)-3-(neopentyloxycarbonyl)-1,4-dioxobutane-2-sulfonate (TC14) are shown to be soluble in dense CO(2) at concentrations up to 6 wt % at 500 bar pressure. This is a remarkably high solubility for such hydrocarbon transition metal surfactants in CO(2). High-pressure small-angle neutron scattering (HP-SANS) has been used to study the surfactant aggregates in a normal organic solvent, cyclohexane, dense CO(2), and also mixtures of these two pure solvents. The results show that transition metal TC14 derivatives are viable compounds for incorporating reactive and functional metal ions into CO(2).
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Affiliation(s)
- Kieran Trickett
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS United Kingdom
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Zhang J, Han B. Supercritical CO2-continuous microemulsions and compressed CO2-expanded reverse microemulsions. J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2008.08.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lee MY, Do KM, Ganapathy HS, Lo YS, Kim JJ, Choi SJ, Lim KT. Surfactant-aided supercritical carbon dioxide drying for photoresists to prevent pattern collapse. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2006.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hasell T, Thurecht KJ, Jones RDW, Brown PD, Howdle SM. Novel one pot synthesis of silver nanoparticle–polymer composites by supercritical CO2 polymerisation in the presence of a RAFT agent. Chem Commun (Camb) 2007:3933-5. [PMID: 17896037 DOI: 10.1039/b710503g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the one pot synthesis of a silver-polymer nanocomposite in supercritical carbon dioxide (scCO(2)) whereby an organometallic silver complex is thermally decomposed in the presence of a reversible addition fragmentation chain transfer (RAFT) agent during a polymerisation reaction in which the RAFT agent simultaneously stabilises the growing polymer microparticles and the formation of surface located silver nanoparticles.
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Affiliation(s)
- Tom Hasell
- University of Nottingham, School of Chemistry, University Park, Nottingham, UKNG7 2RD
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Anand M, Bell PW, Fan X, Enick RM, Roberts CB. Synthesis and Steric Stabilization of Silver Nanoparticles in Neat Carbon Dioxide Solvent Using Fluorine-Free Compounds. J Phys Chem B 2006; 110:14693-701. [PMID: 16869575 DOI: 10.1021/jp0614401] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The adjustable solvent properties, vanishingly low surface tensions, and environmentally green characteristics of supercritical carbon dioxide present certain advantages in nanoparticles synthesis and processing. Unfortunately, most current techniques employed to synthesize and disperse nanoparticles in carbon dioxide use environmentally persistent fluorinated compounds as metal precursors and/or stabilizing ligands. This paper illustrates a one-step process for synthesis and stabilization of silver nanoparticles in carbon dioxide using only fluorine-free compounds. Isostearic acid coated silver nanoaparticles were formed and stably dispersed through arrested precipitation. Silver bis(3,5,5-trimethyl-1-hexyl)sulfosuccinate (Ag-AOT-TMH) was reduced in the presence of isostearic acid as a capping ligand in carbon dioxide solvent to form silver nanoparticles. The addition of cyclohexane as cosolvent or an increase in carbon dioxide solvent density enhances the dispersibility of the particles due to an increase in solvent strength. The dispersibility of the isostearic acid capped silver nanoparticles diminished with time until a stable dispersion was achieved due to the precipitation of a fraction of particle sizes too large to be stabilized by the solvent medium, thereby leaving a smaller size fraction of nanoparticles stably dispersed in the CO2 mixtures. This paper presents the one-step synthesis and stabilization of metallic nanoparticles in neat carbon dioxide without the aid of any fluorinated compounds.
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Affiliation(s)
- Madhu Anand
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, USA
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Lee CK, Vasam CS, Huang TW, Wang HMJ, Yang RY, Lee CS, Lin IJB. Silver(I) N-Heterocyclic Carbenes with Long N-Alkyl Chains. Organometallics 2006. [DOI: 10.1021/om060198h] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. K. Lee
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Chandra Sekhar Vasam
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - T. W. Huang
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - H. M. J. Wang
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - R. Y. Yang
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - C. S. Lee
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Ivan J. B. Lin
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
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