Microwave-assisted synthesis of pyrite FeS2 microspheres with strong absorption performance

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65575-65582 ◽  
Author(s):  
Jian Wu ◽  
Yuxuan Liang ◽  
Pengpeng Bai ◽  
Shuqi Zheng ◽  
Liqiang Chen
Keyword(s):  
Strong Absorption ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Absorption Performance ◽  
Average Size ◽  
Microwave Assisted Method

Pyrite FeS2 microspheres with an average size of approximately 1.1 μm were successfully synthesised in high yield via a facile and efficient microwave-assisted method.

scholarly journals Microwave-Assisted Synthesis of Para-Nitrophenol Using Calcium Nitrate

2021 ◽  
Vol 37 (1) ◽  
pp. 243-246
Author(s):  
Ivy Joyce Arenas Buan ◽  
Dyanne Jane Cid Duldulao
Keyword(s):  
Phenyl Ring ◽  
Calcium Nitrate ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Vibration Modes ◽  
Base Peak ◽  
Environmental Threats ◽  
Microwave Assisted ◽  
Environmentally Safe ◽  
Microwave Assisted Method

Conventional process of nitrating phenolic compounds involves the use of excess corrosive reagents that impose environmental threats. Rapid and environmentally friendly microwave-assisted nitration of phenol has been employed to limit the use of corrosive nitric acid and sulfuric acid. In this study, phenol is reacted to calcium nitrate and acetic acid, which served as nitrating agents. The solution is irradiated under microwave to complete the nitration process. This microwave-assisted- synthesis is a rate- enhanced process that showed complete nitration in a short reaction time of 1 min with a high yield of 89%. Bands of phenyl ring, OH, CO, and nitro groups observed in the FTIR spectra correspond to the vibration modes of para-nitrophenol. GCMS analysis showed a retention time of 7 min for the product with 139m/z base peak with matches that confirms the synthesis of para- nitrophenol. This microwave-assisted method can be employed as an efficient, environmentally safe, and rapid alternative nitration method for the synthesis of para-nitrophenol.

scholarly journals Microwave-Assisted Synthesis of Some New Mixed Ligand Ni(II) Complexes Its Characterization and Its Antimicrobial Study

2021 ◽  
pp. 143-152
Author(s):  
Jitendra M. Pawara ◽  
Sunil S. Patil
Keyword(s):  
Thermal Analysis ◽  
Conventional Method ◽  
Mixed Ligand ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Microwave Method ◽  
Preparation Time ◽  
Microwave Assisted ◽  
Microwave Assisted Method ◽  
Very High

Nickel(II) complexes of the type [Ni(P)(L).2H2O] has been synthesized by using 2-amino-6-methyl pyrimidine-4-ol (HP) and amino acids (HL). Complexes synthesized by conventional as well as microwave methods. Results indicate that complexes synthesized by the microwave method are more efficient than the conventional method. In the microwave method preparation time is short (4-7 min.) compared to the conventional method (45 min.). Moreover, the microwave Assisted method gives a very high yield (90%) of the complexes. The microwave method used for the synthesis of the complexes has been found easier, convenient and eco-friendly. Complexes have been characterized by FTIR, Elemental analysis, Gouy experiment, Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA). Complexes have shown significant antimicrobial activity.

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.

scholarly journals Microwave-Assisted Combustion Synthesis of ZnO Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
M. Kooti ◽  
A. Naghdi Sedeh
Keyword(s):  
Electron Microscopy ◽  
Zno Nanoparticles ◽  
Combustion Method ◽  
Zinc Nitrate ◽  
High Yield ◽  
Fast Method ◽  
Simple Method ◽  
X Ray ◽  
Microwave Assisted ◽  
Average Size

A new and simple method was applied for the synthesis of ZnO nanoparticles with an average size of 20 nm. In this microwave-assisted combustion method, glycine as a fuel and zinc nitrate as precursor were used. The final product was obtained very fast with high yield and purity. The synthesized nanoscale ZnO was characterized by X-ray Diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FT-IR). The size and morphology of the ZnO nanoparticles have been determined by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) techniques. This is a simple and fast method for the preparation of ZnO nanoparticles with no need for expensive materials or complicated treatments.

Microwave-assisted synthesis and deposition of a thin ZnO layer on microwave-exfoliated graphene: optical and electrochemical evaluations

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67988-67995 ◽  
Author(s):  
Rajesh Kumar ◽  
Rajesh Kumar Singh ◽  
Alfredo R. Vaz ◽  
Stanislav A. Moshkalev
Keyword(s):  
Zinc Oxide ◽  
Electrochemical Properties ◽  
Oxide Layer ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Exfoliated Graphene ◽  
Microwave Assisted Method

A rapid and facile microwave-assisted method has been developed for the deposition of a zinc oxide layer on partially microwave exfoliated graphene. The as-prepared hybrids demonstrate enhanced electrochemical properties and show quenching phenomena.

Fast and facile microwave-assisted synthesis of graphene oxide nanosheets

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60102-60105 ◽  
Author(s):  
Xiaobo Wang ◽  
Heqing Tang ◽  
Shuangshuang Huang ◽  
Lihua Zhu
Keyword(s):  
Graphene Oxide ◽  
Microwave Assisted Synthesis ◽  
Graphene Oxide Nanosheets ◽  
Microwave Assisted ◽  
Microwave Assisted Method

A fast and facile microwave-assisted method was developed for preparing GO.

High yield and facile microwave-assisted synthesis of conductive H2SO4 doped polyanilines

2016 ◽  
Vol 173 ◽  
pp. 255-261 ◽  
Author(s):  
Marija R. Gizdavic-Nikolaidis ◽  
Milutin M. Jevremovic ◽  
Maja Milenkovic ◽  
Morgan C. Allison ◽  
Dragomir R. Stanisavljev ◽  
...  
Keyword(s):  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

scholarly journals Green synthesis and crystal structure of 3-(benzothiazol-2-yl)thiophene

2017 ◽  
Vol 73 (11) ◽  
pp. 1647-1651 ◽  
Author(s):  
Linh Nguyen Ngoc ◽  
Trung Vu Quoc ◽  
Hoan Duong Quoc ◽  
Manh Vu Quoc ◽  
Luong Truong Minh ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Crystal Packing ◽  
High Yield ◽  
Dihedral Angles ◽  
Microwave Assisted Synthesis ◽  
Aromatic Rings ◽  
Synthesis And Crystal Structure ◽  
Microwave Assisted ◽  
Compound C ◽  
Whole Molecule Disorder

The title compound, C11H7NS2, was prepared in high yield (87%) using a solvent-free microwave-assisted synthesis. The structure shows whole-molecule disorder with occupancies for two orientations (A and B) of 0.4884 (10) and 0.5116 (10), respectively. The thiophene and benzothiazole rings are almost planar and make dihedral angles of 10.02 (18) and 12.54 (19)° for orientations A and B, respectively. Slipped π–π stacking between the aromatic rings, together with C—H...π, C—H...S and C—H...N interactions, result in a herringbone motif in the crystal packing.

Single-crystalline Bi2Te3 nanosheets with uniform morphology via a simple, efficient, and high-yield microwave-assisted synthesis

2014 ◽  
Vol 406 ◽  
pp. 104-110 ◽  
Author(s):  
Zhiliang Li ◽  
Renyuan Teng ◽  
Shuqi Zheng ◽  
Yuzhuo Zhang ◽  
Ting Huang ◽  
...  
Keyword(s):  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Single Crystalline ◽  
Microwave Assisted

scholarly journals Accelerated syntheses of amine-bis(phenol) ligands in polyethylene glycol or “on water” under microwave irradiation

2008 ◽  
Vol 86 (5) ◽  
pp. 435-443 ◽  
Author(s):  
Francesca M Kerton ◽  
Stacey Holloway ◽  
Angela Power ◽  
R Graeme Soper ◽  
Kristina Sheridan ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Microwave Irradiation ◽  
Hydrophobic Effect ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Mannich Condensation ◽  
Time And Energy

Pure amine-bis(phenol) ligands are readily accessible in high yield, often >90%, when the Mannich condensation reactions are performed “on water” or in poly(ethyleneglycol) (PEG). Microwave-assisted synthesis dramatically reduces the time and energy required to prepare these molecules, typically from 24 h to 5 min. The approach seems to be widely applicable (7 amines and 5 phenols were tested to yield a diverse set of bis(phenol) ligands). Significant improvements in yield were observed for ligands derived from di-tert-amyl and di-tert-butyl phenols, possibly resulting from a hydrophobic effect. Single crystal X-ray diffraction data for the ligand derived from p-cresol and N,N′-dimethylethylenediamine is reported.Key words: amine-phenol, Mannich condensation, on water, microwave, ligand, high-throughput.

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