Halloysite ‐ Poly (ionic liquid) Nanocomposite as an Efficient Catalyst Support: Study of the Effects of Ionic Liquid Nature and Content on the Catalytic Activity

Sadjadi, Samahe; Tavakolian, Mina

doi:10.1002/slct.201900493

Cited by 16 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bis-vinylimidazolium bromide ionic liquid was synthesized according to the previously reported method 46 . In a typical procedure, a solution of 1-vinylimidazole (20 mmol, 1.8 mL) in toluene was prepared, mixed with 1,4-dibromobutane (10 mmol, 1.2 mL) and refluxed for 24 h. Then, the obtained product was filtered, washed with diethyl ether 3 times and dried at ambient temperature.…”

Section: Methodsmentioning

confidence: 99%

Heteroployacid on the composite of boehmite and polyionic liquid as a catalyst for alcohol oxidation and tandem alcohol oxidation Knoevenagel condensation reactions

Abedian-Dehaghani

Sadjadi

Heravi

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

Using boehmite as an available and low-cost natural compound, a bi-functional catalytic composite is prepared through vinyl-functionalization of boehmite, followed by polymerization with the as-prepared bis-vinylimidazolium bromide ionic liquid and supporting of phosphotungstic acid. The catalyst was characterized via ICP, XRD, TGA, FTIR, SEM/EDS and elemental mapping analysis and applied for promoting alcohol oxidation reaction and one-pot tandem alcohol oxidation/Knoevenagel condensation reaction in aqueous media under mild reaction condition. The results indicated high catalytic activity of the catalyst for both reactions. This protocol showed high generality and aliphatic, aromatic and heterocyclic alcohols could be applied as substrates to furnish the corresponding products in high to excellent yields. Furthermore, hot filtration test confirmed true heterogeneous nature of the catalysis. The catalyst could also be recovered readily and reused for at least five runs of the reaction with low loss of the activity and phosphotungstic acid leaching upon each run.

show abstract

Section: Methodsmentioning

confidence: 99%

Heteroployacid on the composite of boehmite and polyionic liquid as a catalyst for alcohol oxidation and tandem alcohol oxidation Knoevenagel condensation reactions

Abedian-Dehaghani

Sadjadi

Heravi

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The combination of the anion and the cation gives ILs special physical and chemical properties of low volatility, high thermal stability and ion conductivity, etc. ; moreover, the typical composition also provides ILs a multiple synthetic choice and diverse applications as a platform compound [25][26][27][28]. In a recent work, Wioletta et al used ionic liquid-modified silica (SIL)-supported metallocene to catalyze ethylene polymerization and obtained linear polyethylene with a high melting temperature and crystallinity, thus proving that the ionic liquid could be used as an olefin polymerization catalyst component [29].…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Modified Porous Organic Polymers as Efficient Metallocene Catalyst Supports

et al. 2022

View full text Add to dashboard Cite

Porous organic polymers (POPs) are widely used in various areas such as adsorption, separation and catalysis. In the present work, ionic liquid-modified porous organic polymers (IL-POPs) synthesized by dispersion polymerization were applied to immobilize metallocene catalysts for olefin polymerization. The prepared IL-POPs were characterized by Fourier transform infrared spectrometer (FT-IR), nitrogen sorption porosimetry, X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), inductively coupled plasma atomic emission spectrometer (ICP) and scanning electron microscope (SEM) analysis. The IL-POPs obtained pores with surface specific area (SSA) ranging from 16.9 m2/g to 561.8 m2/g, and total pore volume (TPV) ranging from 0.08 cm3/g to 0.71 cm3/g. The supported catalysts Zr/MAO@IL-POPs exhibit great activity (3700 kg PE/mol·Zr·bar·h) in ethylene polymerization, and the GPC-IR results show that the polyethylene has narrow molecular weight distribution (2.2 to 2.8). The DSC results show that the melting point of prepared polyethylene was as high as 138 °C, and the TREF analysis results indicate that they have similar chemical composition distribution with elution temperature at 100.5–100.7 °C.

show abstract

“…In the continuation of our research on disclosing the catalytic utility of Hal 23,24 , recently we have reported facile recovery and high reusability of magnetic Hal 25,26 . On the other hand, our research on the catalytic activity of IL-Hal hybrid 27,28 showed that the presence of ILs on the Hal can efficiently improve anchoring of nanoparticles and suppressing their leaching. In this work we design and synthesize a novel catalyst through multi-step procedure, Fig.…”

mentioning

confidence: 96%

Bio-assisted synthesized Pd nanoparticles supported on ionic liquid decorated magnetic halloysite: an efficient catalyst for degradation of dyes

Sadjadi

Mohammadi

Heravi

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

Using natural materials, i.e. halloysite nanoclay that is a biocompatible naturally occurring clay and Heracleum persicum extract that can serve as a green reducing agent, a novel magnetic catalyst, fe 3 o 4 / Hal-Mel-TEA(IL)-Pd, has been designed and fabricated. To prepare the catalyst, halloysite was first magnetized (magnetic particles with mean diameter of 13.06 ± 3.1 nm) and then surface functionalized with melamine, 1,4 dibromobutane and triethanolamine to provide ionic liquid on the halloysite surface (5 wt%). The latter was then used as a support to immobilize Pd nanoparticles that were reduced by Heracleum persicum extract. The characterization of the catalyst established that the loading of Pd in fe 3 o 4 /Hal-Mel-TEA(IL)-Pd was very low (0.93 wt%) and its specific surface area was 63 m 2 g −1 . Moreover, the catalyst showed magnetic property (Ms = 19.75 emu g −1 ) and could be magnetically separated from the reaction. The catalytic performance of the magnetic catalyst for reductive degradation of methyl orange and rhodamine B in the presence of NaBH 4 in aqueous media was investigated. The activation energy, enthalpy, and entropy for the reduction of methyl orange were estimated as 42.02 kJ mol −1 , 39.40 kJ mol −1 , and −139.06 J mol −1 K −1 , respectively. These values for rhodamine B were calculated as 39.97 kJ mol −1 , 34.33 kJ mol −1 , and −155.18 Jmol −1 K −1 , respectively. notably, fe 3 o 4 /Hal-Mel-TEA(IL)-Pd could be reused for eight reaction runs with negligible loss of the catalytic activity (~3%) and Pd leaching (0.01 wt% of the initial loading).Application of low-cost, biocompatible and available natural compounds for the catalytic purposes has attracted tremendous attention. In this regard, use of halloysite (Hal) that is a dioctahedral 1:1 clay of the kaolin group has received growing interest 1-3 . Apart from high thermal, chemical and mechanical stability, the cylindrical morphology and opposite chemical and electrical properties of inner and outer surfaces of Hal, make it distinguished from other clays and broaden its utility for many applications such as cleaning 4 , adsorbents 5,6 , energy storage, catalysis, flame retardancy 1 , sustainable release of drugs etc. Regarding catalysis, Hal not only can be utilized as a catalyst, but also can be applied as a support for the development of reusable catalysts. To date, various chemical, photochemical and electrochemical transformations such as coupling reactions 7,8 , hydrogenation 9,10 , oxidation have been promoted by using Hal-based catalysts [11][12][13][14][15] . Organic dyes such as methylene blue, rhodamine B (RhB) and methyl orange (MO) are toxic chemicals with potential health threat 16 . The release of these compounds in the industrial waste water has raised many concerns and motivated many studies for the efficient removal of these hazardous pollutants or their conversion into less toxic compounds 17,18 . In this context, several approaches, such as use of adsorbents, photodegradation, electrochemical degradations, membrane p...

show abstract

Halloysite ‐ Poly (ionic liquid) Nanocomposite as an Efficient Catalyst Support: Study of the Effects of Ionic Liquid Nature and Content on the Catalytic Activity

Cited by 16 publications

References 42 publications

Heteroployacid on the composite of boehmite and polyionic liquid as a catalyst for alcohol oxidation and tandem alcohol oxidation Knoevenagel condensation reactions

Heteroployacid on the composite of boehmite and polyionic liquid as a catalyst for alcohol oxidation and tandem alcohol oxidation Knoevenagel condensation reactions

Ionic Liquid-Modified Porous Organic Polymers as Efficient Metallocene Catalyst Supports

Bio-assisted synthesized Pd nanoparticles supported on ionic liquid decorated magnetic halloysite: an efficient catalyst for degradation of dyes

Contact Info

Product

Resources

About