Transfer of Biosynthesized Gold Nanoparticles from Water into an Ionic Liquid Using Alkyltrimethyl Ammonium Bromide: An Anion-Exchange Process

Zhou, Yao; Lin, Whei-Min; Wang, Huixuan; Li, Qingbiao; Huang, Jiale; Du, Mingming; Lin, Liqin; Gao, Yixian; Lin, Ling; He, Ning

doi:10.1021/la103586f

Cited by 8 publications

(9 citation statements)

References 37 publications

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“…H 2 Ti 3 O 7 NWs modified by noble metal NPs were prepared by the sol immobilization (SI) method using CP leaves extract as the reductant. It was obtained through a similar method reported by our previous study. , For the Pd/H 2 Ti 3 O 7 NWs catalyst, an amount of the Pd(NO 3 ) 2 solution (74 mM) was put with the CP extract and stirred constantly for 1 h at 90 °C to obtain Pd sol. Afterward, 0.3 g of H 2 Ti 3 O 7 NWs was put into the Pd sol under constant stirring.…”

Section: Methodsmentioning

confidence: 99%

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Zeng

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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One-dimensional H2Ti3O7 nanowires (NWs) supported by Au, Ag, and Pd monometallic nanoparticles (NPs) and Au–Pd bimetallic NPs were prepared and used for photochemical benzyl alcohol oxidation. Techniques, such as XRD, TEM, XPS, N2 physisorption, and diffuse reflectance ultraviolet–visible (DRUV–vis), were used to characterize the obtained catalysts. These results showed that the Pd/H2Ti3O7 NWs catalyst under light irradiation displayed an enhanced photocatalytic performance, nearly 2.6 times higher than that for the catalyst without irradiation and about 1.5 times higher than that for Pd/TiO2(P25) with irradiation. The enhanced benzyl alcohol oxidation activity for Pd/H2Ti3O7 NWs might be due to the favorable synergetic effect between Pd and H2Ti3O7 NWs. Particularly, highly dispersed Pd NPs with about 10.2 nm on H2Ti3O7 NWs can promoted the light harvesting ability. The well-matched contact boundary between H2Ti3O7 NWs and Pd NPs might promote separation for the photoinduced electron and hole pairs. After 5 recycle utilization cycles, there was no evident decline in activity and selectivity for the Pd/H2Ti3O7 NWs catalyst, which still maintained its original structure of H2Ti3O7 NWs. The current study provides a potential application in the green and highly efficient photocatalytic synthesis of other organic compounds and other environmental applications.

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Section: Methodsmentioning

confidence: 99%

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Zeng

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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“…[1] Other surfactants used to create RMs are the cationic species benzyl-nhexadecyldimethylammonium chloride (BHDC) and hexadecyltrimethylammonium bromide (CTAB). [6][7][8][9] It is known that mixtures of surfactants can exhibit considerable synergistic advantages in their properties and applications. [6][7][8][9] It is known that mixtures of surfactants can exhibit considerable synergistic advantages in their properties and applications.…”

Section: Introductionmentioning

confidence: 99%

“…BHDC forms RMs without the addition of cosurfactants [1][2][3][4][5] but CTAB needs the presence of a cosurfactant, usually an alcohol, to generate RMs. [6][7][8][9] It is known that mixtures of surfactants can exhibit considerable synergistic advantages in their properties and applications. [10] Therefore, a new class of surfactant emerges: the catanionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Cationic Surfactant Moiety on the Structure of Water Entrapped in Two Catanionic Reverse Micelles Created from Ionic Liquid‐Like Surfactants

Villa¹,

Silber²,

Correa³

et al. 2014

ChemPhysChem

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The behavior of water entrapped in reverse micelles (RMs) formed by two catanionic ionic liquid-like surfactants, benzyl-n-hexadecyldimethylammonium 1,4-bis-2-ethylhexylsulfosuccinate (AOT-BHD) and cetyltrimethylammonium 1,4-bis-2-ethylhexylsulfosuccinate (AOT-CTA), was investigated by using dynamic (DLS) and static (SLS) light scattering, FTIR, and (1)H NMR spectroscopy techniques. To the best of our knowledge, this is the first report in which AOT-CTA has been used to create RMs and encapsulate water. DLS and SLS results revealed the formation of RMs in benzene and the interaction of water with the RM interface. From FTIR and (1)H NMR spectroscopy data, a difference in the magnitude of the water-catanionic surfactant interaction at the interface is observed. For the AOT-BHD RMs, a strong water-surfactant interaction can be invoked whereas for AOT-CTA this interaction seems to be weaker. Consequently, more water molecules interact with the interface in AOT-BHD RMs with a completely disrupted hydrogen-bond network, than in AOT-CTA RMs in which the water structure is partially preserved. We suggest that the benzyl group present in the BHD(+) moiety in AOT-BHD is responsible for the behavior of the catanionic interface in comparison with the interface created in AOT-CTA. These results show that a simple change in the cationic component in the catanionic surfactant promotes remarkable changes in the RMs interface with interesting consequences, in particular when using the systems as nanoreactors.

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“…Phase transfer of metal NPs from an aqueous phase to organic phase can also be achieved by using thiols, amines, and other hydrophobic ligands, which can coordinate with NPs for phase transfer. , Several methods have been developed by designing amphiphilic NPs, which can be dispersed in both aqueous and organic solvents. − Some external parameters and other surface active ligand molecules have been explored for the phase transfer of AuNPs from aqueous to organic phase transfer. − The phase transfer of AuNPs is limited by the different parameters including stability of AuNPs, aggregation of AuNPs, complexity of the system, etc. Many reports for the synthesis and phase transfer of AuNPs are carried out by either complex molecules or methods. , In most of the cases, the imidazolium ionic liquid systems were used as capping agents either with functionalization or polymeric form. , Wei and his group have reported the transfer of AuNPs from water to hydrophobic ionic liquids [BMIM][PF 6 ]; however, the AuNPs do not retain their nature . The AuNPs are observed to be aggregated after their transfer to [BMIM][PF 6 ], and the surface plasmon resonance (SPR) band shows a red shift because of aggregated AuNPs.…”

Section: Introductionmentioning

confidence: 99%

“…Many reports for the synthesis and phase transfer of AuNPs are carried out by either complex molecules or methods. 21,22 In most of the cases, the imidazolium ionic liquid systems were used as capping agents either with functionalization or polymeric form. 23,24 Wei and his group have reported the transfer of AuNPs from water to hydrophobic ionic liquids [BMIM][PF 6 ]; however, the AuNPs do not retain their nature.…”

Section: ■ Introductionmentioning

confidence: 99%

Ionic Liquid-Responsive Phase Transfer of Gold Nanoparticles: Anionic Metathesis

Thawarkar

Nirmale

et al. 2019

Langmuir

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In this work, a fresh approach has been proposed for the efficient transfer of gold nanoparticles (AuNPs) from an aqueous to organic phase by the metathesis reaction or anion exchange reaction. Here, we synthesized ionic liquid 1-butyl 3-hexadecyl imidazolium bromide [C 4 C 16 Im]-Br-stabilized AuNPs which exhibit excellent stability in solution. Transfer of Au@[C 4 C 16 Im]Br from an aqueous to organic phase was investigated by the metathesis reaction with different hydrophobic ionic liquid-forming salts such as LiNTf 2 , LiClO 4 , and KPF 6 . The anionic exchange process in ionic liquids at the AuNP surface to make hydrophilic to hydrophobic AuNPs is demonstrated. It was found that hydrophobic ionic liquids provide the most effective transfer of AuNPs from the aqueous to organic phase. Interestingly, we have noticed no change in color, size, and shape of AuNPs for more than a month, indicating more efficient transfer of AuNPs in organic solvents, which remained stable for over a month. The ionic liquids with anions NTf 2 − , ClO 4 − , and PF 6 − make the AuNP surface hydrophobic, indicating their good dispersibility in nonpolar solvents. Finally, these AuNPs exhibit excellent sensitivity toward the refractive index of organic solvents, which is correlated with the surface plasmon resonance (SPR) λ SPR bands.

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Transfer of Biosynthesized Gold Nanoparticles from Water into an Ionic Liquid Using Alkyltrimethyl Ammonium Bromide: An Anion-Exchange Process

Cited by 8 publications

References 37 publications

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Effect of the Cationic Surfactant Moiety on the Structure of Water Entrapped in Two Catanionic Reverse Micelles Created from Ionic Liquid‐Like Surfactants

Ionic Liquid-Responsive Phase Transfer of Gold Nanoparticles: Anionic Metathesis

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Transfer of Biosynthesized Gold Nanoparticles from Water into an Ionic Liquid Using Alkyltrimethyl Ammonium Bromide: An Anion-Exchange Process

Cited by 8 publications

References 37 publications

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H2Ti3O7 Nanowires

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H2Ti3O7 Nanowires

Effect of the Cationic Surfactant Moiety on the Structure of Water Entrapped in Two Catanionic Reverse Micelles Created from Ionic Liquid‐Like Surfactants

Ionic Liquid-Responsive Phase Transfer of Gold Nanoparticles: Anionic Metathesis

Contact Info

Product

Resources

About

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires