Microwave-assisted synthesis of void-induced graphene-wrapped nickel oxide hybrids for supercapacitor applications

RSC Advances ◽  
2016 ◽  
Vol 6 (32) ◽  
pp. 26612-26620 ◽  
Author(s):  
Rajesh Kumar ◽  
Rajesh Kumar Singh ◽  
Raluca Savu ◽  
Pawan Kumar Dubey ◽  
Pradip Kumar ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Electrochemical Performance ◽  
Nickel Oxide ◽  
Hybrid Material ◽  
Microwave Assisted Synthesis ◽  
Cyclic Stability ◽  
Microwave Assisted ◽  
Excellent Electrochemical Performance ◽  
Supercapacitor Applications

A simple and fast microwave irradiation technique has been used to synthesize void-induced with graphene-wrapped nickel oxide (VGWN) hybrids. The VGWN hybrid material provides long term cyclic stability and excellent electrochemical performance.

Microwave assisted synthesis of α-Fe2O3/reduced graphene oxide as anode material for high performance lithium ion batteries

2015 ◽  
Vol 39 (10) ◽  
pp. 7923-7931 ◽  
Author(s):  
Shoupu Zhu ◽  
Ming Chen ◽  
Wenji Ren ◽  
Jiren Yang ◽  
Shanshan Qu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Microwave Assisted Synthesis ◽  
Microwave Method ◽  
Microwave Assisted ◽  
Excellent Electrochemical Performance ◽  
Reduced Graphene

Uniform α-Fe2O3/RGO nanocomposites were prepared using a simple and novel microwave method and the synthesized nanocomposites exhibited excellent electrochemical performance for lithium ion batteries.

Microwave-assisted Synthesis of Benzoxazoles Derivatives

2020 ◽  
Vol 7 (3) ◽  
pp. 183-195
Author(s):  
Musa Özil ◽  
Emre Menteşe
Keyword(s):  
Microwave Irradiation ◽  
Reaction Medium ◽  
Pharmaceutical Chemistry ◽  
Conventional Heating ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Optical Brighteners ◽  
Chemistry Research ◽  
Extensive Class

Background: Benzoxazole, containing a 1,3-oxazole system fused with a benzene ring, has a profound effect on medicinal chemistry research owing to its important pharmacological activities. On the other hand, the benzoxazole derivative has exhibited important properties in material science. Especially in recent years, microwave-assisted synthesis is a technique that can be used to increase diversity and quick research in modern chemistry. The utilization of microwave irradiation is beneficial for the synthesis of benzoxazole in recent years. In this focused review, we provide a metaanalysis of studies on benzoxazole in different reaction conditions, catalysts, and starting materials by microwave technique so far, which is different from conventional heating. Methods: Synthesis of different kind of benzoxazole derivatives have been carried out by microwave irradiation. The most used method to obtain benzoxazoles is the condensation of 2-aminophenol or its derivatives with aldehydes, carboxylic acids, nitriles, isocyanates, and aliphatic amines. Results: Benzoxazole system and its derivatives have exhibited a broad range of pharmacological properties. Thus, many scientists have remarked on the importance of the synthesis of different benzoxazole derivatives. Conventional heating is a relatively inefficient and slow method to convey energy in orientation to the reaction medium. However, the microwave-assisted heating technique is a more effective interior heating by straight coupling of microwave energy with the molecules. Conclusion: In this review, different studies were presented on the recent details accessible in the microwave- assisted techniques on the synthesis of the benzoxazole ring. It presents all examples of such compounds that have been reported from 1996 to the present. Benzoxazoles showed an extensive class of chemical substances not only in pharmaceutical chemistry but also in dyestuff, polymer industries, agrochemical, and optical brighteners. Thus the development of fast and efficient achievement of benzoxazoles with a diversity of substituents in high yield is getting more noteworthy. As shown in this review, microwave-assisted synthesis of benzoxazoles is a very effective and useful technique.

Three dimensional carbon nanotube/nickel hydroxide gels for advanced supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30260-30267 ◽  
Author(s):  
Hanlin Cheng ◽  
Hai M. Duong
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Three Dimensional ◽  
Excellent Electrochemical Performance ◽  
Supercapacitor Applications

CNT gel composite presenting different structures have been developed with excellent electrochemical performance for supercapacitor applications.

Microwave-assisted synthesis of quinolones and 4H-1,4-benzo thiazine 1,1-dioxides

2005 ◽  
Vol 2005 (1) ◽  
pp. 27-28 ◽  
Author(s):  
Jaime Charris ◽  
Arthur Barazarte ◽  
José Domínguez ◽  
Neira Gamboa
Keyword(s):  
Microwave Irradiation ◽  
Rapid Method ◽  
Solvent Free ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Solvent Free Conditions

A rapid method for the preparation of N-aryl-2-methylthio-4-oxo-1,4-dihydro quinoline-3-carbonitriles (2a–e) and N-aryl-3-methylthio-4H-1,4-benzothiazine-2-carbonitrile 1,1-dioxides (2f–o) is reported. The cyclization is accelerated by microwave irradiation under solvent free conditions in the presence of K2CO3.

Microwave Assisted Synthesis of Schiff Bases: A Green Approach

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Mousumi Chakraborty ◽  
Sanjay Baweja ◽  
Sunita Bhagat ◽  
TejpalSingh Chundawat
Keyword(s):  
Microwave Irradiation ◽  
Microwave Power ◽  
Mass Spectra ◽  
Molar Ratio ◽  
Microwave Assisted Synthesis ◽  
Schiff’S Bases ◽  
Microwave Assisted ◽  
Green Approach ◽  
Schiff's Bases ◽  
Effects Of Temperature

Abstract In the present study Schiff’s bases are synthesized by the conventional as well as by microwave irradiation. Excellent yield within short reaction time is obtained using microwave irradiation along with other advantages like mild reaction condition, non-hazardous and safer environmental conditions. The effects of temperature, reactant molar ratio, and microwave power variation on yield are observed. Mathematical model has been developed using matlab software to obtain the yield as a function of microwave power. Kinetic study of the reaction has also been attempted. Schiff’s bases structures are confirmed by IR, 1HNMR, Mass Spectra and elemental analysis.

Bifunctional iron disulfide nanoellipsoids for high energy density supercapacitor and electrocatalytic oxygen evolution applications

2019 ◽  
Vol 6 (3) ◽  
pp. 659-670 ◽  
Author(s):  
Zhiqin Sun ◽  
Xue Yang ◽  
Huiming Lin ◽  
Feng Zhang ◽  
Qian Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Oxygen Evolution ◽  
High Energy ◽  
High Energy Density ◽  
Microwave Assisted ◽  
Iron Disulfide ◽  
Excellent Electrochemical Performance ◽  
Microwave Assisted Method

FeS2, prepared using a rapid microwave assisted method, exhibits excellent electrochemical performance for supercapacitor and OER applications.

scholarly journals Microwave Assisted Synthesis of 4-Phenylquinazolin-2(1H)-one Derivatives that Inhibit Vasopressor Tonus in Rat Thoracic Aorta

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1467
Author(s):  
Rafaela Teixeira ◽  
Talita Menengat ◽  
Gabriel Andrade ◽  
Bruno Cotrim ◽  
Cristiano Ponte ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Thoracic Aorta ◽  
Mtt Assay ◽  
Maximum Concentration ◽  
Vascular Reactivity ◽  
Microwave Assisted Synthesis ◽  
Pharmacological Effects ◽  
Microwave Assisted ◽  
Ic50 Values ◽  
Rat Thoracic Aorta

Quinazolinones have pharmacological effects on vascular reactivity through different mechanisms. We synthesized 4-phenylquinazolin-2(1H)-one derivatives under microwave irradiation and tested them on the rat thoracic aorta. The prepared compounds 2a–2f were obtained in about 1 h with suitable yields (31–92%). All derivatives produced vasorelaxant effects with IC50 values ranging from 3.41 ± 0.65 µM to 39.72 ± 6.77 µM. Compounds 2c, 2e and 2f demonstrated the highest potency in endothelium-intact aorta rings (IC50 4.31 ± 0.90 µM, 4.94 ± 1.21 µM and 3.41 ± 0.65 µM respectively), and they achieved around 90% relaxation (30 μM). In aorta rings without an endothelium, the effect of compound 2f was abolished. Using the MTT assay to test for cell viability, only compound 2b induced cytotoxicity at the maximum concentration employed (30 µM). The results show that vasorelaxation by 4-phenylquinazolin-2(1H)-one derivatives might depend on the activation of a signalling pathway triggered by endothelium-derived factors.

scholarly journals Microwave-assisted synthesis followed by a reduction step: making persistent phosphors with a large storage capacity

2020 ◽  
Vol 49 (14) ◽  
pp. 4518-4527 ◽  
Author(s):  
José Miranda de Carvalho ◽  
David Van der Heggen ◽  
Lisa I. D. J. Martin ◽  
Philippe F. Smet
Keyword(s):  
Microwave Irradiation ◽  
Storage Capacity ◽  
Microwave Assisted Synthesis ◽  
Persistent Luminescence ◽  
Reduction Step ◽  
Microwave Assisted

Microwave irradiation leads to highly homogeneous emitting sites, and large storage capacity in persistent luminescence materials after the reducing step.

scholarly journals Microwave Assisted Synthesis of 1,5-Benzothiazepines Using Greener Reaction Medium

2019 ◽  
Vol 31 (5) ◽  
pp. 993-996 ◽  
Author(s):  
Sanjay S. Kotalwar ◽  
Amol D. Kale ◽  
Ram B. Kohire ◽  
Vasant B. Jagrut
Keyword(s):  
Reaction Time ◽  
Microwave Irradiation ◽  
Reaction Medium ◽  
Microwave Assisted Synthesis ◽  
Reaction Conditions ◽  
Renewable Sources ◽  
Microwave Assisted ◽  
High Yields

An efficient and eco-friendly synthesis of 1,5-benzothiazepines has been developed by the reaction of various 2-propen-1-ones with 2-aminothiophenol using microwave irradiation in greener reaction medium, glycerol. The clean reaction conditions, shorter reaction time, high yields and non-toxic, biodegradable reaction medium manufactured from renewable sources are unique features of this method.

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