Shape-controlled synthesis of phosphor K2SiF6:Mn4+ nanorods and their luminescence properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (4) ◽  
pp. 930-936 ◽  
Author(s):  
Xiaoqing Li ◽  
Xiangming Su ◽  
Ping Liu ◽  
Jie Liu ◽  
Zhiling Yao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Controlled Synthesis ◽  
Bulk Materials ◽  
Step Method ◽  
Red Phosphor ◽  
Red Emission ◽  
Characteristic Lines ◽  
One Step ◽  
Shape Controlled ◽  
Uv Excitation

A red phosphor K2SiF6:Mn4+ nanorod is successfully prepared through an efficient one-step method at room temperature for 30 min. Under UV excitation, K2SiF6:Mn4+ nanorods show better red emission corresponding to the characteristic lines of Mn4+ compared to bulk materials.

Facile shape-controlled synthesis of luminescent europium benzene-1,3,5-tricarboxylate architectures at room temperature

CrystEngComm ◽  
2009 ◽  
Vol 11 (12) ◽  
pp. 2622 ◽  
Author(s):  
Kai Liu ◽  
Hongpeng You ◽  
Yuhua Zheng ◽  
Guang Jia ◽  
Lihui Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Controlled Synthesis ◽  
Shape Controlled

Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

2019 ◽  
Vol 7 (18) ◽  
pp. 10898-10904 ◽  
Author(s):  
Xu Jiang ◽  
Songwei Li ◽  
Yongping Bai ◽  
Lu Shao
Keyword(s):  
Aqueous Solution ◽  
Gas Separation ◽  
Molecular Sieve ◽  
Room Temperature ◽  
Hydrogen Purification ◽  
Step Method ◽  
Zeolitic Imidazolate Framework ◽  
Aqueous Synthesis ◽  
One Step

An ultra-facile one-step method is discovered to synthesize defect-free ZIF-8 molecular sieve membranes in aqueous solution at room temperature for exceptional gas separation.

Convenient Molecular Approach of Size and Shape Controlled ZnSe and ZnTe Nanocrystals

2001 ◽  
Vol 635 ◽  
Author(s):  
Young-wook Jun ◽  
Jong-Il Park ◽  
Jinwoo Cheon
Keyword(s):  
Particle Size ◽  
Semiconductor Nanocrystals ◽  
Dimensional Sphere ◽  
Controlled Synthesis ◽  
Molecular Approach ◽  
Molecular Precursors ◽  
Size And Shape ◽  
Wide Range ◽  
One Step ◽  
Shape Controlled

AbstractOur study describes a convenient one-step synthesis of ZnSe and ZnTe nanocrystals (NC) whose sizes and shapes are precisely tuned by varing the growth temperature or stabilizing surfactants. We utilized molecular precursors, bis(phenylselenolate or phenyltellurolato)zinc -N,N,N',N'-tetramethylethylenediamine (TMEDA), which effectively produce 0-dimensional sphere or 1-dimensional nanorods of ZnSe or ZnTe, respectively. Nanocrystals are highly monodispersed and luminescent; the emission wavelength varies over a wide range depending on the particle size. This study constitutes a nice demonstration of direct size and shape controlled synthesis of semiconductor nanocrystals and this method can be extended to the synthesis of nanocrystals of other materials.

Shape-Controlled Synthesis of PbS Nanocrystals via a Simple One-Step Process

Langmuir ◽  
2012 ◽  
Vol 28 (47) ◽  
pp. 16436-16443 ◽  
Author(s):  
Yu Wang ◽  
Aiwei Tang ◽  
Kai Li ◽  
Chunhe Yang ◽  
Miao Wang ◽  
...  
Keyword(s):  
Controlled Synthesis ◽  
Step Process ◽  
Pbs Nanocrystals ◽  
One Step ◽  
Shape Controlled

Synthesis of the Carboxyl and Pyridine Functional Ionic Liquids

2014 ◽  
Vol 513-517 ◽  
pp. 246-250 ◽  
Author(s):  
Ying Xiong ◽  
Min Yang
Keyword(s):  
Ionic Liquids ◽  
Reaction Time ◽  
Anion Exchange ◽  
Room Temperature ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Maximum Yield ◽  
Step Method ◽  
Strong Base ◽  
One Step

The effects of different solvents on synthesis of base functional ionic liquid, butyl pyridinium hydroxide ([bPy]OH), from butyl pyridinium bromine ([bPy]Br) were investigated systematically using KOH/NaOH as the base agent and strong base anion exchange resin. The results showed that the yield of [bPy]OH achieved 35% with the molar ratio of 1:1.1 ([bPy]Br to NaOH) using dichloromethane under room temperature. With isopropanol and 8 h of the reaction time, the yield could reach 88% with byproducts. The yield of 97% without byproduct was achieved by using strong base anion exchange resin in column chromatography static reaction for 0.25 h. The yield of carboxyl and pyridine functional ionic liquids based on neutralization method, exchange method and one-step method were compared and the results showed that the one-step method possessed the maximum yield of 88% with 3 h of the reaction time at room temperature.

Room-temperature synthesis and warm-white LED applications of Mn4+ ion doped fluoroaluminate red phosphor Na3AlF6:Mn4+

2016 ◽  
Vol 4 (13) ◽  
pp. 2480-2487 ◽  
Author(s):  
E. H. Song ◽  
J. Q. Wang ◽  
S. Ye ◽  
X. F. Jiang ◽  
M. Y. Peng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Room Temperature ◽  
White Led ◽  
Color Purity ◽  
Step Method ◽  
Temperature Synthesis ◽  
Red Phosphor ◽  
Room Temperature Synthesis ◽  
Good Thermal Stability ◽  
High Color Purity

An intense red fluoroaluminate phosphor, cryolite Na3AlF6:Mn4+, with high color purity and good thermal stability has been designed and synthesized via a facile two-step method at room temperature.

scholarly journals Electrocatalytic Properties of Co Nanoconical Structured Electrode Produced by One-Step and Two-Step Methods

2020 ◽  
Vol 2 (1) ◽  
pp. 12
Author(s):  
Katarzyna Skibinska ◽  
Karolina Kolczyk-Siedlecka ◽  
Dawid Kutyla ◽  
Anna Jedraczka ◽  
Piotr Zabinski
Keyword(s):  
Active Surface ◽  
Bulk Sample ◽  
Active Surface Area ◽  
Bulk Materials ◽  
Step Method ◽  
Geometrical Size ◽  
Electrocatalytic Properties ◽  
One Step ◽  
The One ◽  
Method Show

One-dimensional (1D) nanostructures, such as nanotubes, nanopores, nanodots and nanocones, are characterized by better catalytic properties than bulk materials due to their large active surface area and small geometrical size. There are several methods of synthesis for these structures, including the one- and two-step methods. In the one-step method, a crystal modifier is added to the solution in order to limit the horizontal direction of structures growing during electrodeposition. In this work, cobalt nanoconical structures were obtained from an electrolyte containing CoCl2, H3BO3 and NH4Cl as the crystal modifier. Another method of production of 1D nanocones is electrodeposition of the metal into porous anodic alumina oxide (AAO) templates. This method is called the two-step method. In this case, an AAO template was obtained using two-step anodization. Then, electrodeposition of cobalt was performed from an electrolyte containing CoSO4 and H3BO3. Nanocones obtained by the two-step method show smaller geometrical size. The bulk sample was electrodeposited from the same electrolyte. The electrocatalytic properties of materials fabricated by the one-step and two-step methods were measured in 1M NaOH and compared with bulk materials. Co cones obtained by the one-step method show the worst electrocatalytic properties. The hydrogen evolution reaction started the earliest for Co nanocones electrodeposited in the templates.

Controlled Synthesis of Gold Nanostructures by a Thermal Approach

2008 ◽  
Vol 8 (7) ◽  
pp. 3465-3472 ◽  
Author(s):  
Min Zhou ◽  
Michael Bron ◽  
Wolfgang Schuhmann
Keyword(s):  
Aqueous Solution ◽  
Experimental Parameter ◽  
Thermal Reduction ◽  
Gold Nanostructures ◽  
Controlled Synthesis ◽  
Oh Groups ◽  
Generic Strategy ◽  
One Step ◽  
Different Shapes ◽  
Shape Controlled

Shape-controlled gold nanostructures were successfully synthesized in an aqueous solution by a one-step, non-templated thermal reduction method through heating of a poly(vinylpyrrolidone)/HAuCl4 aqueous solution. Poly(vinylpyrrolidone) (PVP) serves as both the stabilizing surfactant and reducing agent for the controlled synthesis of gold nanostructures with different shapes. Upon adjusting the chain-length and the concentration of the PVP, decahedral, icosahedral and platelike gold nanostructures with dominating distribution were fabricated, respectively, with the ratio of terminating OH groups at the polymer to Au ions as an important experimental parameter. The results suggest that the morphology of the gold nanostructures could be tuned by this method. The successful preparation of gold nanostructures exemplifies a very facile, effective, and generic strategy for fabrication of gold nanoparticles with various shapes.

One-step, size-controlled synthesis of gold nanoparticles at room temperature using plant tannin

2010 ◽  
Vol 12 (3) ◽  
pp. 395-399 ◽  
Author(s):  
Xin Huang ◽  
Hao Wu ◽  
Xuepin Liao ◽  
Bi Shi
Keyword(s):  
Gold Nanoparticles ◽  
Room Temperature ◽  
Controlled Synthesis ◽  
Step Size ◽  
One Step ◽  
Size Controlled
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