Anneal-induced transformation of phase structure, morphology and luminescence of GdPO4:Sm3+ nanomaterials synthesized by a hydrothermal method

2017 ◽  
Vol 46 (9) ◽  
pp. 2948-2956 ◽  
Author(s):  
Xiao Zou ◽  
Lihua He ◽  
Dihao Tan ◽  
Fengying Lei ◽  
Na Jiang ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Hydrothermal Method ◽  
Phase Structure ◽  
Annealing Temperature ◽  
Luminescent Properties ◽  
Facile Hydrothermal Method ◽  
Structure Morphology

GdPO4·H2O:xSm3+ nanomaterials were synthesized via a facile hydrothermal method and the effects of Sm3+ concentrations and annealing temperature on the crystal structures, morphologies, and luminescent properties were studied.

Fabrication and Luminescent Properties of YVO4: Eu3+/MCM-41 Mesoporous Composites

2014 ◽  
Vol 707 ◽  
pp. 102-105
Author(s):  
Yi Jiang ◽  
Su Wen Li
Keyword(s):  
Hydrothermal Method ◽  
Luminescent Properties ◽  
Mesoporous Structure ◽  
Luminescence Properties ◽  
Ordered Mesoporous ◽  
Structure Morphology ◽  
Intrinsic Excitation ◽  
Mesoporous Composites ◽  
Mcm 41

The optical functionalized YVO4: Eu3+/MCM-41 mesoporous composites were prepared by hydrothermal method. The structure, morphology, luminescence properties and fluorescence dynamics were studied systemically. The compared studies of the luminescence properties of YVO4: Eu3+/MCM-41 with YVO4: Eu3+ nanocrystal were performed. The results show that the YVO4: Eu3+/MCM-41 retains high ordered mesoporous structure of MCM-41. In YVO4: Eu3+/MCM-41, the intrinsic excitation bands of Eu3+ disappears and the lifetimes of Eu3+ become short. The luminescent efficiency of YVO4: Eu3+/MCM-41 is higher than ones of the YVO4: Eu3+ nanocrystal.

A novel red phosphor of BaGe(1−x)TixF6:Mn4+ solid solution: facile hydrothermal controlled synthesis, microstructures and luminescent properties

2019 ◽  
Vol 7 (36) ◽  
pp. 11265-11275 ◽  
Author(s):  
Qinyu Li ◽  
Ran Luo ◽  
Li Feng ◽  
Chengli Dong ◽  
Zhanglei Ning ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrothermal Method ◽  
Luminescent Properties ◽  
Controlled Synthesis ◽  
Promising Candidate ◽  
Facile Hydrothermal Method ◽  
Red Phosphor

A series of BaGe(1−x)TixF6:Mn4+ solid solution phosphor crystals have been successfully synthesized by a facile hydrothermal method. The obtained BaGe(1−x)TixF6:Mn4+ can be a promising candidate as the red phosphor used in warm WLEDs.

The Dependence of Structure, Morphology, and Photocatalytic Properties of SnO2 Nanoparticles Prepared via In Situ Hydrothermal Method on Annealing Temperature

2021 ◽  
Vol 21 (4) ◽  
pp. 2588-2594
Author(s):  
Pham Van Tuan ◽  
Le Trung Hieu ◽  
Vu Thi Tan ◽  
Tran Thi Quynh Hoa ◽  
La Quynh Nga ◽  
...  
Keyword(s):  
Water Pollution ◽  
Hydrothermal Method ◽  
High Performance ◽  
Tin Dioxide ◽  
Annealing Temperature ◽  
Sno2 Nanoparticles ◽  
Photocatalytic Properties ◽  
Structure Morphology ◽  
Photocatalytic Activities

New high-performance photocatalytic materials are required to effectively treat water pollution. The effect of annealing temperature on the photocatalytic activities of tin dioxide (SnO2) nanoparticles is investigated in this work. SnO2 nanoparticles are prepared via a hydrothermal method and annealing at various temperatures ranging from as-prepared to 900 °C. The size of SnO2 nanoparticles increases from 4 nm to 10 nm with an increase in annealing temperature. The photocatalytic properties of these nanoparticles are evaluated through the photocatalytic degradation of methylene blue under sunlight. Photocatalytic activities decrease significantly with an increase in annealing temperature due to an increase in size and a decrease in the surface area of SnO2 nanoparticles.

Hydrothermal Synthesis and Luminescent Properties of Eu3+ Doped Sr3Al2O6 Phosphor for White LED

2016 ◽  
Vol 16 (4) ◽  
pp. 3474-3479 ◽  
Author(s):  
Xu Li ◽  
Heng Pan ◽  
Aiwei Tang ◽  
Jinping Zhang ◽  
Li Guan ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Single Phase ◽  
Luminescent Properties ◽  
Synthesis Temperature ◽  
Rare Earth Ions ◽  
Light Sources ◽  
Luminescent Materials ◽  
Facile Hydrothermal Method ◽  
Optimal Value ◽  
New Generation

Eu3+ ions doped Sr3Al2O6 phosphors were successfully synthesized via a hydrothermal method. The precursor was prepared by low temperature hydrothermal method using ammonia as both alkaline source and precipitator. Then the final product was obtained by high temperature sintering. In addition, the structures, morphologies, and luminescent properties of as-prepared products were thoroughly characterized by X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), Fluorescence spectroscopy (PL). XRD shown a single phase Sr3Al2O6 prepared by a facile hydrothermal method at 250 °C for 10 h. In the PL spectra of as-prepared samples, the optimal value of Eu3+ concentration is 2 mol%. From the fluorescent spectra, the emission peaks of Sr3Al2O6: Eu3+ phosphors are centered at around 591 nm, and the excitation peaks are centered at around 233 nm, 323 nm, 394 nm, and 468 nm, respectively, which were assigned to the characteristic transition of Eu3+ ions. The influence of ammonia, and the synthesis temperature on the luminescent properties of Sr3Al2O6: Eu3+ phosphors were studied in detail. The alkaline earth aluminates luminescent materials activated by rare earth ions have good prospects in the field of new-generation light sources.

Preparation of the BaF2: Ce3+, Yb3+ Nanoparticles and near Infrared Luminescent Properties

2014 ◽  
Vol 707 ◽  
pp. 98-101
Author(s):  
Su Wen Li ◽  
Yi Jiang ◽  
Shu Guang Ju
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Hydrothermal Method ◽  
Conversion Efficiency ◽  
Near Infrared ◽  
Luminescent Properties ◽  
Photoluminescence Properties ◽  
Structure Morphology

The BaF2: Ce3+, Yb3+ nanoparticles doped with different concentration were prepared by a hydrothermal method. The structure,morphology and photoluminescence properties were studied. In BaF2: Ce3+, Yb3+ nanoparticles, a strong near infrared emissionat 900 – 1050 nm matching to energy of Si band gap of Si-based solar cells was observed under the excitation of 5d level of Ce3+. As a downconversion luminescent convertor, the kinds of materials have potential to be applied in front of Si-based solar cells to reduce thermalization loss and enhance conversion efficiency of solar cells.

Luminescent properties of Y(OH)3: Tb nanopowders synthesized by microwave-assisted hydrothermal method

2019 ◽  
Vol 21 (5) ◽  
Author(s):  
I. A. Garduño-Wilches ◽  
G. Alarcón-Flores ◽  
S. Carmona-Téllez ◽  
J. Guzmán ◽  
M. Aguilar-Frutis
Keyword(s):  
Hydrothermal Method ◽  
Luminescent Properties ◽  
Microwave Assisted

A novel Fe recycling method from pickling wastewater producing a KFeS2 whisker for electroplating wastewater treatment

2021 ◽  
Author(s):  
Dongxu Liang ◽  
Manhong Ji ◽  
Suiyi Zhu ◽  
Yu Chen ◽  
Zhihua Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Hydrothermal Method ◽  
Facile Hydrothermal Method ◽  
Electroplating Wastewater ◽  
Pickling Sludge

Pickling sludge was converted to a novel product of KFeS2 nanorods via a facile hydrothermal method that effectively removes heavy metals from electroplating wastewater.

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