Imidazolium ionic liquid-modified fibrous silica microspheres loaded with gold nanoparticles and their enhanced catalytic activity and reusability for the reduction of 4-nitrophenol

2014 ◽  
Vol 2 (30) ◽  
pp. 12060 ◽  
Author(s):  
Honglei Yang ◽  
Shuwen Li ◽  
Xueyao Zhang ◽  
Xiaoyu Wang ◽  
Jiantai Ma
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Catalytic Activity ◽  
Silica Microspheres ◽  
Imidazolium Ionic Liquid

Strong Promoting Effect of Gold Nanoparticles on the CO Abatement Catalytic Activity of CoO x /Clay‐Bonded SiC Catalysts Produced by AA‐MOCVD Method Using Co(acac) 2 as Precursor

2020 ◽  
Vol 5 (44) ◽  
pp. 13878-13887
Author(s):  
Golnoosh MirMoghtadaei ◽  
Manoj K. Ghosalya ◽  
Luca Artiglia ◽  
Jeroen A. Bokhoven ◽  
Cavus Falamaki
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Promoting Effect

scholarly journals Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hossein Abdollahi-Basir ◽  
Boshra Mirhosseini-Eshkevari ◽  
Farzad Zamani ◽  
Mohammad Ali Ghasemzadeh
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Organic Framework ◽  
One Pot ◽  
Short Reaction Time ◽  
Three Component Reaction ◽  
Metal Organic ◽  
Ft Ir ◽  
Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

scholarly journals Catalytic Activity of Beta-Cyclodextrin-Gold Nanoparticles Network in Hydrogen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 118
Author(s):  
Qui Quach ◽  
Erik Biehler ◽  
Ahmed Elzamzami ◽  
Clay Huff ◽  
Julia M. Long ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Gold Catalyst ◽  
Hydrogen Gas ◽  
Hydrolysis Reaction ◽  
X Ray Diffraction ◽  
Beta Cyclodextrin ◽  
Transmission Electron ◽  
Production Of Hydrogen ◽  
Climate Crisis

The current climate crisis warrants investigation into alternative fuel sources. The hydrolysis reaction of an aqueous hydride precursor, and the subsequent production of hydrogen gas, prove to be a viable option. A network of beta-cyclodextrin capped gold nanoparticles (BCD-AuNP) was synthesized and subsequently characterized by Powder X-Ray Diffraction (P-XRD), Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM), and Ultraviolet-Visible Spectroscopy (UV-VIS) to confirm the presence of gold nanoparticles as well as their size of approximately 8 nm. The catalytic activity of the nanoparticles was tested in the hydrolysis reaction of sodium borohydride. The gold catalyst performed best at 303 K producing 1.377 mL min−1 mLcat−1 of hydrogen. The activation energy of the catalyst was calculated to be 54.7 kJ/mol. The catalyst resisted degradation in reusability trials, continuing to produce hydrogen gas in up to five trials.

scholarly journals Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 641
Author(s):  
Lukasz Wolski ◽  
Grzegorz Nowaczyk ◽  
Stefan Jurga ◽  
Maria Ziolek
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Benzyl Alcohol ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Key Factor ◽  
Au Particle Size ◽  
Co Precipitation

The aim of the study was to establish the influence of a co-precipitation agent (i.e., NaOH–immediate precipitation; hexamethylenetetramine/urea–gradual precipitation and growth of nanostructures) on the properties and catalytic activity of as-synthesized Au-CeO2 nanocomposites. All catalysts were fully characterized with the use of XRD, nitrogen physisorption, ICP-OES, SEM, HR-TEM, UV-vis, XPS, and tested in low-temperature oxidation of benzyl alcohol as a model oxidation reaction. The results obtained in this study indicated that the type of co-precipitation agent has a significant impact on the growth of gold species. Immediate co-precipitation of Au-CeO2 nanostructures with the use of NaOH allowed obtainment of considerably smaller and more homogeneous in size gold nanoparticles than those formed by gradual co-precipitation and growth of Au-CeO2 nanostructures in the presence of hexamethylenetetramine or urea. In the catalytic tests, it was established that the key factor promoting high activity in low-temperature oxidation of benzyl alcohol was size of gold nanoparticles. The highest conversion of the alcohol was observed for the catalyst containing the smallest Au particle size (i.e., Au-CeO2 nanocomposite prepared with the use of NaOH as a co-precipitation agent).

Microwave-Assisted Preparation of Molecularly Imprinted Monolith Combining Imidazolium Ionic Liquid and POSS for Enhanced Extraction of Baicalin-Like Compounds in Scutellaria Baicalensis by means of In-Capillary SPME Followed by on-line LC and off-line LC-MS/MS

2021 ◽  
Author(s):  
Xiaohan Zhang ◽  
Le Gao ◽  
Liying Niu ◽  
Xiaodong Bi
Keyword(s):  
Ionic Liquid ◽  
Molecularly Imprinted Polymers ◽  
Scutellaria Baicalensis ◽  
Synthetic Methods ◽  
Imidazolium Ionic Liquid ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Microwave Assisted ◽  
On Line ◽  
Molecularly Imprinted Monolith

Molecularly imprinted polymers (MIPs) possess target-customized and range-adjustable selectivity, and hence have been attracting increasing efforts to develop new synthetic methods and new forms of applications. By wisely choosing functional...

Cross-linked ionic resins and gels from epoxide-functionalized imidazolium ionic liquid monomers

Polymer ◽  
2014 ◽  
Vol 55 (16) ◽  
pp. 3305-3313 ◽  
Author(s):  
William M. McDanel ◽  
Matthew G. Cowan ◽  
Trevor K. Carlisle ◽  
Anna K. Swanson ◽  
Richard D. Noble ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Imidazolium Ionic Liquid

Physicochemical and radiolytic degradation properties of dihexyloctanmide-imidazolium ionic liquid

2017 ◽  
Vol 247 ◽  
pp. 93-99 ◽  
Author(s):  
Alok Rout ◽  
Satyabrata Mishra ◽  
K.A. Venkatesan ◽  
M.P. Antony ◽  
N.K. Pandey ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Imidazolium Ionic Liquid ◽  
Radiolytic Degradation ◽  
Degradation Properties
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