Improved photo-luminescence behaviour of Eu3+ activated CaMoO4 nanoparticles via Zn2+ incorporation

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 55977-55985 ◽  
Author(s):  
B. P. Singh ◽  
Maheshwary Maheshwary ◽  
P. V. Ramakrishna ◽  
Saurabh Singh ◽  
V. K. Sonu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Reaction Medium ◽  
Photo Luminescence ◽  
Polyol Method ◽  
Capping Agent ◽  
Co Doped

Zn2+ (0, 2, 5, 7 and 10 at%) co-doped CaMoO4:2Eu3+ nanophosphors have been synthesized via the polyol method using ethylene glycol (EG) as both capping agent and reaction medium at 150 °C.

Re-Dispersible Li+ and Eu3+ Co-Doped Nanocrystalline ZnO: Luminescence and EPR Studies

2008 ◽  
Vol 8 (6) ◽  
pp. 3059-3062 ◽  
Author(s):  
R. S. Ningthoujam ◽  
N. S. Gajbhiye ◽  
Asar Ahmed ◽  
S. S. Umre ◽  
S. J. Sharma
Keyword(s):  
Oxygen Vacancy ◽  
Ethylene Glycol ◽  
Organic Solvent ◽  
Green Light ◽  
Urea Hydrolysis ◽  
Capping Agent ◽  
Zno Particles ◽  
Doped Zno ◽  
Co Doped

Nano-crystals of ZnO, Eu3+ doped ZnO, and Li+, Eu3+ co-doped ZnO have been prepared by urea hydrolysis in ethylene glycol medium at 150 °C. Ethylene glycol acts as capping agent for nanoparticles. Three colors 437 (blue), 540 (green) and 615 nm (red) from 2 at.% Li+ and 5 at.% Eu3+ co-doped ZnO have been observed from luminescence studies compared to that from 5 at.%. Eu3+ doped ZnO, which shows emission at 437 and 615 nm. It is established that green light is originated from the oxygen vacancy brought by Li+ incorporation into ZnO. Particles are re-dispersible in organic solvent such as ethanol, and are able to incorporate into polymer-based material such as SiO2 matrix.

Low-Temperature Liquid-Phase Synthesis and Electrochemical Activity of α-Nickel Hydroxide with Flower-Like Micro-/Nano-Structure

2011 ◽  
Vol 347-353 ◽  
pp. 3379-3383
Author(s):  
Zhi Wei Li ◽  
Xu Xiang ◽  
Zong Min Tian
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Ethylene Glycol ◽  
Nickel Hydroxide ◽  
Variable Temperature ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Electrochemical Activity ◽  
Nano Structure ◽  
Pure Phase

The synthesis of α-nickel hydroxide has been achieved via a facile liquid-phase precipitation approach, using the mixed solvents of ethylene glycol and water as reaction medium at low temperature. The XRD characterization indicates that pure phase α-Ni(OH)2can be obtained under variable temperature and pH value. The products present a flower-like micro-/nano-structure assembled with curved nanosheets. The nanosheets have the width of 100~500 nm and the thickness of 20~70 nm. The cavities are formed in the structure due to the interconnection of curved nanosheets. The solvents play a key role in the formation of Ni(OH)2with different forms. Pure phase α-Ni(OH)2can only be synthesized in the mixed solvents of ethylene glycol and water. Cyclic voltammetry was applied to test the electrochemical activity of the as-synthesized α-Ni(OH)2. The findings suggest that the α-Ni(OH)2with a micro-/nano-structure exhibits excellent electrochemical activity, which may be considered as a promising candidate of electrode material.

Three-Component Synthesis of 4-Arylidene-3-alkylisoxazol-5(4H)-ones in the presence of potassium 2,5-dioxoimidazolidin-1-ide

2021 ◽  
Vol 25 ◽  
Author(s):  
Neda Reihani ◽  
Hamzeh Kiyani
Keyword(s):  
Ethylene Glycol ◽  
Ethyl Acetoacetate ◽  
Reaction Medium ◽  
Hydroxylamine Hydrochloride ◽  
Aromatic Aldehydes ◽  
Catalyst Loading ◽  
Efficient Synthesis ◽  
Current Process ◽  
High Yields ◽  
Low Catalyst Loading

: An efficient synthesis of 4-arylidene-3-alkylisoxazole-5(4H)-ones has been implemented via the three-component cyclocondensation of aryl(heteroaryl)aldehydes with hydroxylamine hydrochloride and β-ketoesters. The potassium 2,5-dioxoimidazolidin-1-ide has been introduced as the new organocatalyst to facilitate of this heterocyclization. In the current process, three starting materials, including substituted benzaldehydes/heterocyclic aromatic aldehydes, hydroxylamine hydrochloride, and ethyl acetoacetate/propyl acetoacetate/butyryl acetoacetate have been successfully used for the synthesize of the number of substituted isoxazole-5(4H)-ones in good to high yields in ethylene glycol as a green reaction medium at 80 ºC. The low catalyst loading is also a main advantage over the some reported catalysts.

Photoluminescence properties of Bi3+ and Eu3+ co-doped LaGaO3 nanoparticles: Synthesized by polyol method

2016 ◽  
Author(s):  
T. Samuel ◽  
P. V. S. S. S. N. Reddy ◽  
Y. Rama Krishna ◽  
V. Veeraiah ◽  
K. Ramachandra Rao
Keyword(s):  
Polyol Method ◽  
Photoluminescence Properties ◽  
Co Doped

Preparation and properties of ceramic electrolytes in the Nd and Gd Co-doped ceria systems prepared by polyol method

2019 ◽  
Vol 792 ◽  
pp. 1141-1149 ◽  
Author(s):  
Aliye Arabacı ◽  
Tuba Gürkaynak Altınçekiç ◽  
Mehtap Der ◽  
Mehmet Ali Faruk Öksüzömer
Keyword(s):  
Polyol Method ◽  
Doped Ceria ◽  
Ceramic Electrolytes ◽  
Co Doped

Direct Synthesis of Deep Cavity p-Phenylcalix[4]arene in Poly(Ethylene Glycol), and its Self-Association in the Solid State

2006 ◽  
Vol 59 (4) ◽  
pp. 260 ◽  
Author(s):  
Mohamed Makha ◽  
Colin L. Raston ◽  
Alexandre N. Sobolev
Keyword(s):  
Solid State ◽  
Ethylene Glycol ◽  
Direct Synthesis ◽  
Reaction Medium ◽  
State Structure ◽  
Poly Ethylene Glycol ◽  
Solid State Structure ◽  
Deep Cavity ◽  
Self Association ◽  
Poly Ethylene

p-Phenylcalix[4]arene is formed directly from p-phenylphenol in 66% yield (50% isolated yield) using poly(ethylene glycol) as the reaction medium, with crystallization of the pure cavitand from toluene mediated by p-carborane. The solid-state structure comprises interlocking columnar arrays.

Asymmetric allylic substitution of cycloalkenyl esters in water with an amphiphilic resin-supported chiral palladium complex

2007 ◽  
Vol 79 (9) ◽  
pp. 1481-1489 ◽  
Author(s):  
Yasuhiro Uozumi
Keyword(s):  
Ethylene Glycol ◽  
Palladium Complex ◽  
Reaction Medium ◽  
Optically Active ◽  
Racemic Mixture ◽  
Poly Ethylene Glycol ◽  
Supported Palladium ◽  
Poly Ethylene ◽  
Phosphine Complex ◽  
Single Reaction

A novel homochiral phosphine ligand, (3R,9aS)[2-aryl-3-(2-diphenylphosphino)phenyl]tetrahydro-1H-imidazo[1,5-a]indole-1-one, was designed, prepared, and anchored onto an amphiphilic polystyrene-poly(ethylene glycol) copolymer (PS-PEG) resin. Catalytic asymmetric substitution of a racemic mixture of cycloalkenyl esters with carbon, nitrogen, and oxygen nucleophiles was achieved in water as the single reaction medium under heterogeneous conditions by using the PS-PEG resin-supported palladium-imidazoindole phosphine complex to give optically active substituted cycloalkenes with up to 99 % ee.

Sign in / Sign up

Export Citation Format

Share Document