Aliquat 336 stabilized multi-faceted gold nanoparticles with minimal ligand density

Naz, Gul; Othaman, Zulkafli; Shamsuddin, Mustaffa; Ghoshal, Sib Krishna

doi:10.1016/j.apsusc.2015.11.124

Cited by 21 publications

(12 citation statements)

References 57 publications

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“…Furthermore, silica aerogels presented a highly fragile structure and were not used in high pressure catalytic tests. The corresponding absorption bands of pure [Aliquat][Cl] (Figure 1, IL) can be seen at 1480 cm −1 (CH2 blending) and between 2800 and 3000 cm −1 (C-H stretching) [49] In this case, it was also possible to observe the [Aliquat][Cl] characteristic peaks in the spectrum. In comparison with alginate aerogel, the silica aerogel SIL2 had weaker absorption bands at 1480 cm −1 and between 2800 and 3000 cm −1 , which indicates a lower [Aliquat][Cl] loading.…”

Section: Resultsmentioning

confidence: 87%

“…This hampers the FTIR analysis of Zn(II)-AHBD content in the aerogels and prompted us to use atomic absorption technique. The corresponding absorption bands of pure [Aliquat][Cl] (Figure 1, IL) can be seen at 1480 cm −1 (CH2 blending) and between 2800 and 3000 cm −1 (C-H stretching) [49]. The obtained spectrum of pure [Aliquat][Cl] was compared with the [Aliquat][Cl]-impregnated alginate aerogels (Figure 1, Zn-IL-ALG and IL-ALG) and it was observed that [Aliquat][Cl] characteristic peaks also appeared in the spectrum, which indicates that [Aliquat][Cl] was successfully impregnated into the alginate aerogels.…”

Section: Resultsmentioning

confidence: 99%

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A Bio-Based Alginate Aerogel as an Ionic Liquid Support for the Efficient Synthesis of Cyclic Carbonates from CO2 and Epoxides

et al. 2021

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In this work, the ionic liquid [Aliquat][Cl] was supported into alginate and silica aerogel matrices and applied as a catalyst in the cycloaddition reaction between CO2 and a bio-based epoxide (limonene oxide). The efficiency of the alginate aerogel system is much higher than that of the silica one. The method of wet impregnation was used for the impregnation of the aerogel with [Aliquat][Cl] and a zinc complex. The procedure originated a well-defined thin solvent film on the surface of support materials. Final materials were characterised by Fourier Transform Infrared Spectroscopy, N2 Adsorption–Desorption Analysis, X-ray diffraction, atomic absorption and Field Emission Scanning Microscopy. Several catalytic tests were performed in a high-pressure apparatus at 353.2 K and 4 MPa of CO2.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

A Bio-Based Alginate Aerogel as an Ionic Liquid Support for the Efficient Synthesis of Cyclic Carbonates from CO2 and Epoxides

et al. 2021

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“…The FTIR spectra shows the presence of multiple bands of methyl (CH 3 ) and methylene (CH 2 ) groups at 2923 cm −1 and 2855 cm −1 , due to the fact that the amine quaternary hydrocarbons contain three medium hydrocarbon chains. [ 47,48 ] The band identified at 1635 cm −1 is attributed to the vibration of C‐N groups of [TOMA + ][Cl − ], which, with an increasing number of cycles, the peak increases probably due to the bending vibration of the water molecules. [ 49 ] The bands at 1466 cm −1 and 1378 cm −1 are associated with the quaternary ammonium cation [TOMA + ] of [TOMA + ][Cl − ].…”

Section: Resultsmentioning

confidence: 99%

Highly selective solvent extraction of Zn(II) and Cr(III) with trioctylmethylammonium chloride ionic liquid

et al. 2021

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This study investigates the recovery of Zn(II) and Cr(III) from aqueous solutions based on solvent extraction with trioctylmethylammonium chloride [TOMA+][Cl‐], commercialy named Aliquat 336. Single metal solutions and binary mixtures of both metals were considered. The effect of relevant operating conditions such as pH, contact time, initial concentration, O/A phase volumetric ratio, and temperature were evaluated. Additionally, loading capacity and stripping studies were performed. Results showed that [TOMA+][Cl−] is an effective extracting agent for Zn(II), reaching maximum removal capacity at pH 1.8 and demonstrating fast extraction kinetics. Extraction efficiencies above 99% were achieved at 0.5, 0.75, and 1.00 O/A volumetric phase ratios for 0.1 g/L initial Zn(II) concentration. At 1 g/L and 10 g/L concentration, for the same O/A ratios, approximately 88% of the initial Zn(II) was extracted. In contrast, it was found that negligible amounts of Cr(III) were transferred to the [TOMA+][Cl−] phase at the 1‐5 pH range. Selectivity studies showed that Zn(II) removal is boosted in the presence of Cr(III), although no Cr(III) is extracted. [TOMA+][Cl−] exhibited a high Zn(II) storage capacity, since after 25 loading cycles with 1 g/L, the loading capacity reached approximately 13.5 g/L, and after five loading cycles with 5 g/L, the capacity reached 19.4 g/L. Stripping tests revealed that NaOH is an efficient agent for the removal of Zn(II) from the ionic liquids, reaching 98.5% removal after two cycles, whereas HNO3 is not a suitable agent, reaching less than 40% removal after three cycles. [TOMA+][Cl−] revealed high potential for separating Zn(II) from Cr(III).

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“…However, the surfactant also possesses greater stability against air and moisture attack, in addition to ease of handling, when compared to other cationic ligands. 14 On the basis of literature survey carried out, it has been observed that majority of the work with respect to the improvement of properties like wear and friction of ENi-P deposits are based on post/heat treatment or incorporation of hard (SiC, Al 2 O 3 )/soft (PTFE, MoS 2 , graphite) particles into the Ni-P matrix 15,16 resulting in improved hardness or enhanced lubricity respectively. The addition of cationic surfactant CTAB has shown to have improved the tribological properties of electroless Ni-P coatings.…”

Section: Introductionmentioning

confidence: 99%

“…However, the surfactant also possesses greater stability against air and moisture attack, in addition to ease of handling, when compared to other cationic ligands. 14…”

Section: Introductionmentioning

confidence: 99%

Influence of Aliquat 336 on tribological properties of electroless ternary nanocomposite coatings on AZ91 alloy

Ansari

Thakur

2017

Proceedings of the Institution of Mechanical Engineers, Part E:

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Incorporation of fine nanoparticles and cationic surfactant (Aliquat 336) within an ENi-P matrix has given a new dimension to the field of nanocomposite coatings. It describes the surface engineering processes currently used for the protection of AZ91 magnesium alloy surface against wear, including electroless nano-composite coatings. The present work aims to investigate the influence of Aliquat 336 cationic surfactant on the microhardness and tribological properties of electroless (Ni-P-ZnO) ternary alloy nanocomposite coatings on AZ91 magnesium alloy substrate from acidic bath. The results revealed that there was a significant improvement in the microhardness and wear resistance of the coated surface by the addition of cationic surfactant at a concentration of 1.5 g/L as compared to the coating obtained without the addition of cationic surfactant in the chemical bath. These results are thus clearly indicative of the fact that the component of life of members made from substrate subjected to nanocomposite coatings with varying the concentration of surfactant can be greatly improved, thereby preventing early or regular failures, and increasing service life.

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Aliquat 336 stabilized multi-faceted gold nanoparticles with minimal ligand density

Cited by 21 publications

References 57 publications

A Bio-Based Alginate Aerogel as an Ionic Liquid Support for the Efficient Synthesis of Cyclic Carbonates from CO2 and Epoxides

A Bio-Based Alginate Aerogel as an Ionic Liquid Support for the Efficient Synthesis of Cyclic Carbonates from CO2 and Epoxides

Highly selective solvent extraction of Zn(II) and Cr(III) with trioctylmethylammonium chloride ionic liquid

Influence of Aliquat 336 on tribological properties of electroless ternary nanocomposite coatings on AZ91 alloy

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