scholarly journals Microwave-Assisted Synthesis of High-Energy Faceted TiO2 Nanocrystals Derived from Exfoliated Porous Metatitanic Acid Nanosheets with Improved Photocatalytic and Photovoltaic Performance

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3614 ◽  
Author(s):  
Yi-en Du ◽  
Xianjun Niu ◽  
Wanxi Li ◽  
Jing An ◽  
Yufang Liu ◽  
...  
Keyword(s):  
Hydrothermal Reaction ◽  
Uv Light ◽  
Photovoltaic Performance ◽  
High Energy ◽  
Anatase Tio2 ◽  
Microwave Assisted Synthesis ◽  
Tio2 Nanocrystals ◽  
One Pot ◽  
Microwave Assisted ◽  
Metatitanic Acid

A facile one-pot microwave-assisted hydrothermal synthesis of rutile TiO2 quadrangular prisms with dominant {110} facets, anatase TiO2 nanorods and square nanoprisms with co-exposed {101}/[111] facets, anatase TiO2 nanorhombuses with co-exposed {101}/{010} facets, and anatase TiO2 nanospindles with dominant {010} facets were reported through the use of exfoliated porous metatitanic acid nanosheets as a precursor. The nanostructures and the formation reaction mechanism of the obtained rutile and anatase TiO2 nanocrystals from the delaminated nanosheets were investigated. The transformation from the exfoliated metatitanic nanosheets with distorted hexagonal cavities to TiO2 nanocrystals involved a dissolution reaction of the nanosheets, nucleation of the primary [TiO6]8− monomers, and the growth of rutile-type and anatase-type TiO2 nuclei during the microwave-assisted hydrothermal reaction. In addition, the photocatalytic activities of the as-prepared anatase nanocrystals were evaluated through the photocatalytic degradation of typical carcinogenic and mutagenic methyl orange (MO) under UV-light irradiation at a normal temperature and pressure. Furthermore, the dye-sensitized solar cell (DSSC) performance of the synthesized anatase TiO2 nanocrystals with various morphologies and crystal facets was also characterized. The {101}/[111]-faceted pH2.5-T175 nanocrystal showed the highest photocatalytic and photovoltaic performance compared to the other TiO2 samples, which could be attributed mainly to its minimum particle size and maximum specific surface area.

A simple, economical one-pot microwave assisted synthesis of nitrogen and sulfur co-doped graphene for high energy supercapacitors

2020 ◽  
Vol 341 ◽  
pp. 135999 ◽  
Author(s):  
Domga ◽  
Manickavasakam Karnan ◽  
Fatai Oladoyinbo ◽  
Guy Bertrand Noumi ◽  
Jean Bosco Tchatchueng ◽  
...  
Keyword(s):  
High Energy ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Microwave Assisted ◽  
Doped Graphene ◽  
Co Doped

Microwave Mediated Fast Synthesis of Diaminoglyoxime and 3,4-diaminofurazan: Key Synthons for the Synthesis of High Energy Density Materials

2005 ◽  
Vol 2005 (4) ◽  
pp. 245-247 ◽  
Author(s):  
Radhika S Kusurkar ◽  
Shailesh K. Goswami ◽  
Mahadev B. Talawar ◽  
Girish M. Gore ◽  
Shri N. Asthana
Keyword(s):  
Microwave Irradiation ◽  
Hydroxylamine Hydrochloride ◽  
High Energy ◽  
High Energy Density ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Vicarious Nucleophilic Substitution ◽  
Microwave Assisted ◽  
High Energy Density Materials ◽  
Fast Synthesis

This paper reports the first microwave-assisted synthesis of diaminoglyoxime (DAG) and diaminofurazan (DAF). The synthesis involved the vicarious nucleophilic substitution of H of glyoxime using hydroxylamine hydrochloride under microwave irradiation for 2 to 3 min to obtain DAG, which on further irradiation in alkali solution for 20 min yielded DAF. Conversion of glyoxime into DAF was also achieved in a one pot sequence in good overall yield using microwave irradiation.

scholarly journals One-Pot Microwave-Assisted Synthesis of Water-Soluble Pyran-2,4,5-triol Glucose Amine Schiff Base Derivative: XRD/HSA Interactions, Crystal Structure, Spectral, Thermal and a DFT/TD-DFT

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 117
Author(s):  
Yousef Hijji ◽  
Rajeesha Rajan ◽  
Hamdi Ben Yahia ◽  
Said Mansour ◽  
Abdelkader Zarrouk ◽  
...  
Keyword(s):  
Schiff Base ◽  
Molecular Orbital ◽  
Density Functional ◽  
Condensation Reaction ◽  
3D Structure ◽  
Water Soluble ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Microwave Assisted ◽  
Td Dft

The(3R,4R,6R)-3-(((E)-2-hydroxybenzylidene)amino)-6-(hydroxymethyl)tetrahydro-2H-pyran-2,4,5-triol water-soluble Glucose amine Schiff base (GASB-1) product was made available by condensation of 2-hydroxybenzaldehyde with (3R,6R)-3-amino-6-(hydroxymethyl)-tetra-hydro-2H-pyran-2,4,5-triol under mono-mode microwave heating. A one-pot 5-minute microwave-assisted reaction was required to complete the condensation reaction with 90% yield and without having byproducts. The 3D structure of GASB-1 was solved from single crystal X-ray diffraction data and computed by DFT/6-311G(d,p). The Hirshfeld surface analysis (HSA), molecular electronic potential (MEP), Mulliken atomic charge (MAC), and natural population analysis (NPA) were performed. The IR and UV-Vis spectra were matched to their density functional theory (DFT) relatives and the thermal behavior was resolved in an open-room condition via thermogravimetry/Derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC). The highest occupied molecular orbital/lowest unoccupied molecular orbital (HOMO/LUMO), density of state (DOS), and time-dependence TD-DFT computations were correlated to the experimental electron transfer in water and acrylonitrile solvents.

Microwave-assisted synthesis of 1-aryl-1H-indazoles via one-pot two-step Cu-catalyzed intramolecular N-arylation of arylhydrazones

2005 ◽  
Vol 46 (44) ◽  
pp. 7553-7557 ◽  
Author(s):  
Chittari Pabba ◽  
Hong-Jun Wang ◽  
Susan R. Mulligan ◽  
Zhen-Jia Chen ◽  
Todd M. Stark ◽  
...  
Keyword(s):  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Microwave Assisted

A simple method for producing mesoporous anatase TiO2 nanocrystals with elevated photovoltaic performance

2010 ◽  
Vol 62 (5) ◽  
pp. 223-226 ◽  
Author(s):  
K.P.S. Parmar ◽  
Easwaramoorthi Ramasamy ◽  
Jin Woo Lee ◽  
Jae Sung Lee
Keyword(s):  
Photovoltaic Performance ◽  
Anatase Tio2 ◽  
Tio2 Nanocrystals ◽  
Simple Method

Facile one-pot microwave-assisted synthesis of tungsten-doped BiVO4/WO3 heterojunctions with enhanced photocatalytic activity

2020 ◽  
Vol 125 ◽  
pp. 110783 ◽  
Author(s):  
Caroline H. Claudino ◽  
Maria Kuznetsova ◽  
Bárbara S. Rodrigues ◽  
Changqiang Chen ◽  
Zhiyu Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Microwave Assisted

scholarly journals Screening of Natural Deep Eutectic Solvents for Green Synthesis of 2-methyl-3-substituted Quinazolinones and Microwave-Assisted Synthesis of 3-aryl Quinazolinones in Ethanol

2020 ◽  
Vol 92 (4) ◽  
pp. 511-517
Author(s):  
Mario Komar ◽  
Maja Molnar ◽  
Anastazija Konjarević
Keyword(s):  
Green Synthesis ◽  
Anthranilic Acid ◽  
Deep Eutectic Solvents ◽  
13C Nmr Spectroscopy ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
1H And 13C Nmr ◽  
Microwave Assisted ◽  
Natural Deep Eutectic Solvents ◽  
Quinazolinone Derivatives

In this study, two fast and efficient protocols for green synthesis of 3-substituted quinazolinones were perfomed. A synthesis of 2-methyl-3-substituted quinazolinones was performed in natural deep eutectic solvents, while 3-aryl quinazolinones were obtained by using microwave assisted synthesis. Benzoxazinone, which was used as an intermediate in the synthesis of 2-methyl-3-substituted quinazolinones, was prepared conventionally from anthranilic acid and acetic anhydride. In order to find the most appropriate synthetic path, twenty natural deep eutectic solvents were applied as a solvent in these syntheses. Choline chloride:urea (1 : 2) was found to be the most efficient solvent and was further used in the synthesis of 2-methyl quinazolinone derivatives (2–12). 3-Aryl quinazolinones (13–17), on the other hand, were synthesized in one-pot microwave-assisted reaction of anthranilic acid, different amines and trimethyl orthoformate. All compounds were synthesized in good to excellent yields, characterized by LC-MS/MS spectrometry and 1H- and 13C-NMR spectroscopy.

Sign in / Sign up

Export Citation Format

Share Document