Ionic Liquid-assisted Preparation of Two-dimensional ZnO/Fe3O4 Nano-composites and their Application in Polysubstituted Pyrroles Synthesis

2020 ◽  
Vol 23 (1) ◽  
pp. 55-65
Author(s):  
Hossein Karami ◽  
Maryam Sabbaghan ◽  
Zinatossadat Hossaini ◽  
Faramarz Rostami-Charati
Keyword(s):  
Ionic Liquid ◽  
Catalytic Performance ◽  
Sem Analysis ◽  
Soft Template ◽  
Primary Amines ◽  
Nano Composites ◽  
Two Dimensional ◽  
Catalytic Systems ◽  
Green Catalyst ◽  
Excellent Catalytic Performance

Aim and Objective: Ionic liquids are a suitable medium for stabilization and preparation of catalytic systems. Materials and Methods: The two-dimensional (2D) ZnO/Fe3O4 nanocomposites were synthesized using ionic liquid [OMIM]Br as a stabilizer and soft template. The nanocomposites were characterized via FTIR, XRD, VSM and SEM analysis. Results: The catalytic activity of these composites was evaluated using a multicomponent reaction of primary amines, acetylacetone, and 2-bromoacetophenone. Conclusion: 2D ZnO/Fe3O4 as a recyclable and green catalyst showed excellent catalytic performance for the preparation of poly-substituted pyrroles.

scholarly journals Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54266-54276 ◽  
Author(s):  
Haiyan Ji ◽  
Haitao Ju ◽  
Rong Lan ◽  
Peiwen Wu ◽  
Jia Sun ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Oxidative Desulfurization ◽  
Supported Catalyst ◽  
Phosphomolybdic Acid ◽  
Catalytic Performance ◽  
Catalytic Oxidative Desulfurization ◽  
Enhanced Stability ◽  
Excellent Catalytic Performance

An ionic liquid modified hexagonal boron nitride was developed for preparation of a supported catalyst with enhanced stability and excellent catalytic performance in catalytic oxidative desulfurization.

Electrocatalytic reduction of CO2 by two-dimensional transition metal porphyrin sheets

2019 ◽  
Vol 7 (19) ◽  
pp. 11944-11952 ◽  
Author(s):  
Jin-Hang Liu ◽  
Li-Ming Yang ◽  
Eric Ganz
Keyword(s):  
Transition Metal ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Electrocatalytic Reduction ◽  
Metal Porphyrin ◽  
Reduction Of Co2 ◽  
Excellent Catalytic Performance ◽  
Cu And Zn ◽  
Electrocatalytic Reduction Of Co2 ◽  
Monolayer Catalysts

The first transition metal series TM–PP monolayer catalysts exhibit excellent catalytic performance during the process of electroreduction of CO2. The products have 2e− CO (Sc, Mn and Ni), HCOOH (Cr, Fe, Co, Cu and Zn), 8e− CH4 (Ti and V), and the overpotential of the reaction can be as low as 0.127 V.

Design of a graphene nitrene two-dimensional catalyst providing a well-defined site accommodating up to three metals, with application to N2 reduction electrocatalysis

2020 ◽  
Vol 56 (63) ◽  
pp. 8960-8963 ◽  
Author(s):  
Li Li ◽  
Lai Xu
Keyword(s):  
Metal Cluster ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Excellent Catalytic Performance

We studied NRR catalytic performance of metal cluster doped on the C2N monolayer, the homonuclear metal cluster (Rh3) and heteronuclear metal cluster (Co2Mo) were screened out, which have excellent catalytic performance.

Two dimensional graphene oxides converted to three dimensional P, N, F and B, N, F tri-doped graphene by ionic liquid for efficient catalytic performance

Carbon ◽  
2019 ◽  
Vol 151 ◽  
pp. 53-67 ◽  
Author(s):  
Balaji Murugesan ◽  
Nithya Pandiyan ◽  
Mayakrishnan Arumugam ◽  
Muthulakshmi Veerasingam ◽  
Jegatheeswaran Sonamuthu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Graphene Oxides ◽  
Doped Graphene

Preparation and Catalytic Property of Composite Ionic Liquid Immobilized on SBA-15

2021 ◽  
Author(s):  
Li-ying Guo ◽  
Li-Ning Shan ◽  
Hai-Yue Wang ◽  
Rong-Rong Zheng ◽  
Li-Li Shi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Molecular Sieves ◽  
Cycloaddition Reaction ◽  
Catalytic Performance ◽  
High Energy ◽  
Active Components ◽  
Continuous Transformation ◽  
Immobilized Catalysts ◽  
Excellent Catalytic Performance ◽  
High Energy Chemical

In this work, we report a more simple and efficient way to the synthesis of composite ionic liquid (IL) ([BMIM][Zn2Br5]) by directly coupling IL with molecular sieves. Two kinds of immobilized catalysts were successfully synthesized: SBA-15-[BMIM][Zn2Br5] and SBA-15-CPTES-[BMIM][Zn2Br5], respectively. The catalysts were used to catalyze the cycloaddition reaction of continuous transformation of CO2 and propylene oxide (PO) and the catalytic performance of catalysts was further studied. Compared with the traditional IL catalysts, the catalysts not only have excellent catalytic performance, but also have better catalytic performance and significantly longer service life. The reason is that the catalysts are formed by high energy chemical bond of silane between IL catalysts and molecular sieves, which can effectively solve the problem of loss of IL active components in the catalytic process.

scholarly journals Layered Zn2[Co(CN)6](CH3COO) double metal cyanide: a two-dimensional DMC phase with excellent catalytic performance

2019 ◽  
Vol 10 (18) ◽  
pp. 4868-4875 ◽  
Author(s):  
Carlos Marquez ◽  
Arkadiy Simonov ◽  
Michael T. Wharmby ◽  
Cédric Van Goethem ◽  
Ivo Vankelecom ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Metal Cyanide ◽  
Highly Active ◽  
Excellent Catalytic Performance

A new, layered double metal cyanide phase proved to be a reusable, stable and highly active catalyst in two important DMC applications.

scholarly journals Synthesis of a Novel Magnetically Retrievable Nanocomposite with Au Nanocatalysts for Hydration Reaction

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 789
Author(s):  
Xiaoxi Yu ◽  
Yingjie Dai ◽  
Youran Wu ◽  
Yunfeng Cheng ◽  
Qingshan Zhao
Keyword(s):  
Au Nanoparticles ◽  
Catalytic Performance ◽  
Industrial Applications ◽  
Metal Leaching ◽  
Core Shell ◽  
Hydration Reaction ◽  
Two Dimensional ◽  
Practical Applications ◽  
Reduced Graphene ◽  
Excellent Catalytic Performance

Developing efficient catalysts with good recyclability is of great importance for its practical applications. In this study, a novel magnetically retrievable nanocomposite (Au-SiO2@Fe3O4-RGO) was synthesized for catalyzing hydration reaction. Active Au nanoparticles are deposited on core-shell SiO2@Fe3O4, which are further supported by a two-dimensional reduced graphene oxide (RGO) platform. The prepared Au-SiO2@Fe3O4-RGO was proven to be efficient as well as recyclable. An excellent catalytic performance, with 97% yield towards the hydration of phenylacetylene, was achieved for the catalyst in dioxane. Remarkably, the catalyst can be readily recycled through magnetic separation and achieved superior catalyst recovery and stability after seven cycles without any metal leaching. This work provides a strategy to fabricate recyclable and durable catalysts for industrial applications.

Glucose dehydration to 5-hydroxymethylfurfural in ionic liquid over Cr3+-modified ion exchange resin

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9290-9297 ◽  
Author(s):  
Hui Liu ◽  
Hongwei Wang ◽  
Yuan Li ◽  
Wei Yang ◽  
Changhua Song ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Catalytic Performance ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Excellent Catalytic Performance

Cr3+-D001-cc resin shows excellent catalytic performance for the dehydration of glucose to 5-hydromethylfurfural, which is prepared by a simple ion-exchange method.

Efficient and Versatile Catalytic Systems for the N-Methylation of Primary Amines with Methanol Catalyzed by N-Heterocyclic Carbene Complexes of Iridium

Synthesis ◽  
2018 ◽  
Vol 50 (23) ◽  
pp. 4617-4626 ◽  
Author(s):  
Ken-ichi Fujita ◽  
Genki Toyooka ◽  
Akiko Tuji
Keyword(s):  
Low Temperatures ◽  
Aromatic Amines ◽  
Catalytic Performance ◽  
Aliphatic Amines ◽  
Primary Amines ◽  
Iridium Complexes ◽  
Reaction Conditions ◽  
Catalytic Systems ◽  
Carbene Complexes ◽  
Amine Compounds

Efficient and versatile catalytic systems were developed for the N-methylation of both aliphatic and aromatic primary amines using methanol as the methylating agent. Iridium complexes bearing an N-heterocyclic carbene (NHC) ligand exhibited high catalytic performance for this type of transformation. For aliphatic amines, selective N,N-dimethylation was achieved at low temperatures (50–90 °C). For aromatic amines, selective N-monomethylation and selective N,N-dimethylation were accomplished by simply changing the reaction conditions (presence or absence of a base with an appropriate catalyst). These findings can be used to develop methods for synthesizing useful amine compounds having N-methyl or N,N-dimethyl moieties.

Fabrication and Excellent Catalytic Performance of Three-dimensional Ordered Mesoporous Molybdenum Oxides

2014 ◽  
Vol 29 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Yu-Cheng DU ◽  
Guang-Wei ZHENG ◽  
Qi MENG ◽  
Li-Ping WANG ◽  
Hai-Guang FAN ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Catalytic Performance ◽  
Molybdenum Oxides ◽  
Ordered Mesoporous ◽  
Excellent Catalytic Performance
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