Facile Synthesis, Morphology Evolution and Tunable Luminescence of NaGdF4:Yb,Er Nanorods with Various Aspect Ratios

NANO ◽  
2018 ◽  
Vol 13 (08) ◽  
pp. 1850093 ◽  
Author(s):  
Shasha Gai ◽  
Jiqing Jiao ◽  
Wei Wei ◽  
Yao Li ◽  
Lihua Liu ◽  
...  
Keyword(s):  
Energy Level ◽  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Morphology Evolution ◽  
Schematic Diagram ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
Facile Hydrothermal Method ◽  
Aspect Ratios ◽  
Lower Temperature

The well-defined NaGdF4:Yb,Er nanorods (NRs) with various aspect ratios were synthesized using a facile hydrothermal method. The morphology and crystal phase of NRs could be controlled by reaction conditions. NaGdF4:Yb,Er NRs with various aspect ratios could be synthesized and their upconversion (UC) luminescence was tuned. It is displayed that the NRs with aspect ratios about 5 exhibited the strongest UC luminescence among samples. The growth mechanism and morphology transition of NRs had been deduced by schematic diagram. And UC mechanism had been determined by energy level diagrams. Compared with previous reports, the work provided a facial method for UCNRs with various aspect ratios at lower temperature.

Facile Synthesis of Hydroxyapatite Nanorods with Controlled Sizes and Morphologies

2010 ◽  
Vol 148-149 ◽  
pp. 1584-1587
Author(s):  
Sha Sha Lv ◽  
Ning Wang ◽  
Gui Cun Li ◽  
Hong Rui Peng
Keyword(s):  
Hydrothermal Method ◽  
Calcium Chloride ◽  
Hydrogen Phosphate ◽  
Facile Synthesis ◽  
High Quality ◽  
Facile Hydrothermal Method ◽  
Diammonium Hydrogen Phosphate ◽  
Diammonium Hydrogen

High quality hydroxyapatite (HAP) nanorods have been synthesized at 180 °C by a facile hydrothermal method using calcium chloride and diammonium hydrogen phosphate as precursors in the absence of any surfactants. The diameters and lengths of HAP nanorods are in the range of 40-80 nm and 0.2-2.0 μm respectively. The sizes and morphologies of HAP nanorods can be controlled by adjusting the synthetic parameters, such as reaction temperatures, and types of surfactants. A possible mechanism was also proposed to explain the growth of the HAP nanorods.

Morphology Evolution and Luminescence Properties of YF3: Sm Nano-/Microcrystals

2012 ◽  
Vol 463-464 ◽  
pp. 112-118
Author(s):  
Feng Tao ◽  
Geng Zhu ◽  
Zhi Jun Wang ◽  
Feng Pan ◽  
Yu Feng Sun ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Room Temperature ◽  
Red Light ◽  
Environmentally Friendly ◽  
Morphology Evolution ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Display Devices ◽  
Potential Applications

Abstract. Recently, there has been increasting interest in the doping of nano-/microcrystal hosts with Sm3+. However, very few examples of Sm3+doped YF3-based nanophosphors have been reported. In this paper, a variety of uniform YF3:Sm nano-/microcrystals have been successfully prepared by a facile, effective, and environmentally friendly hydrothermal method. The morphology evolution process has been investigated by quenching the reaction at different time. Based on the results, a possible growth mechanism is presented in detail. The as-obtained YF3:Sm nano-/microcrystals show strong yellow and red light emissions under room temperature, which is quite different from those reported previously and might find potential applications in fields such as light phosphor powers and advanced flat panel display devices.

Facile synthesis of magnetic Bi25FeO40/rGO catalyst with efficient photocatalytic performance for phenolic compounds under visible light

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 4905-4908 ◽  
Author(s):  
Yan Wu ◽  
Hanjin Luo ◽  
Xiaolu Jiang ◽  
Hou Wang ◽  
Junjie Geng
Keyword(s):  
Graphene Oxide ◽  
Phenolic Compounds ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Photocatalytic Performance ◽  
Utilization Efficiency ◽  
Facile Synthesis ◽  
Facile Hydrothermal Method ◽  
Reduced Graphene

To improve the utilization efficiency of the Bi25FeO40 catalyst, Bi25FeO40-reduced graphene oxide (rGO) composite photo-catalysts were prepared by a facile hydrothermal method.

Hydrothermal Synthesis and Growth Mechanism of Mesoporous ZnO Microtubes

2012 ◽  
Vol 554-556 ◽  
pp. 481-484
Author(s):  
Yan Li ◽  
Yun Ling Zou ◽  
Qing Jun Zhou
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Wall Thickness ◽  
Hydrothermal Reaction ◽  
Reaction System ◽  
Wurtzite Structure ◽  
Facile Hydrothermal Method ◽  
High Supersaturation ◽  
Mesoporous Zno

Porous ZnO microtubes have been synthesized via a facile hydrothermal method based on nanoparticle splicing growth and the preferential etching strategy in the hydrothermal reaction system with high supersaturation. The ZnO tubes have hexangular wurtzite structure with a dimension of about 6 to 12 m in length, 4 m in diameter and about 40 nm in wall thickness, which is made of numerous mesopores with diameter ranging from 40 nm to 200 nm.

Facile synthesis of 2D nitrogen-containing porous carbon nanosheets induced by graphene oxide for high-performance supercapacitors

2018 ◽  
Vol 2 (11) ◽  
pp. 2494-2501 ◽  
Author(s):  
Xu Zhang ◽  
Qiuyu Fan ◽  
Yingyuan Zhao ◽  
Man Wang ◽  
Yulan Meng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Porous Carbon ◽  
High Performance ◽  
Facile Synthesis ◽  
Facile Hydrothermal Method ◽  
Structure Directing Agent ◽  
Carbon Nanosheets

2D N-containing porous carbon nanosheets are prepared in the presence of GO as a structure-directing agent by a facile hydrothermal method.

Hollow Crystals of BiFeO3 Prepared via a Al3+-Assisted Hydrothermal Method

2012 ◽  
Vol 174-177 ◽  
pp. 516-519
Author(s):  
Yong Gang Wang ◽  
Lin Lin Yang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Method ◽  
Field Emission ◽  
Growth Mechanism ◽  
Irregular Shape ◽  
Morphology Evolution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The BiFeO3 hollow crystals were successfully prepared at 200oC by a Al3+assisted hydrothermal method. The structures and morphologies of the as-obtained products were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (SEM). A morphology evolution from irregular shape to square, hollow, and sphere-like was observed as the Al ions concentration varied from 0% to 1.5%. The possible growth mechanism of the BiFeO3hollow crystals was also discussed.

Facile synthesis of Cu2PO4OH hierarchical nanostructures and their improved catalytic activity by a hydroxyl group

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100934-100942 ◽  
Author(s):  
Yunxuan Zhao ◽  
Fei Teng ◽  
Juan Xu ◽  
Zailun Liu ◽  
Yang Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Method ◽  
Three Dimensional ◽  
Hydroxyl Group ◽  
Facile Synthesis ◽  
Facile Hydrothermal Method ◽  
Hierarchical Nanostructures ◽  
Hierarchical Architectures

One- and three-dimensional (1D, 3D) Cu2PO4OH hierarchical architectures have been successfully prepared by a facile hydrothermal method, mainly through adjusting the precursor concentrations.

Study of Fibrous AlPO4-5 via Hydrothermal Conditions: Morphology Evolution and Growth Mechanism

2012 ◽  
Vol 535-537 ◽  
pp. 2535-2539
Author(s):  
Chun Xia Zhao ◽  
Yun Xia Yang ◽  
Wen Chen ◽  
Paul Webley ◽  
Jin Qiao Cao
Keyword(s):  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Molecular Sieves ◽  
Molar Ratio ◽  
Structure Evolution ◽  
Morphology Evolution ◽  
Hydrothermal Conditions ◽  
Morphology And Structure ◽  
Fibrous Morphology ◽  
Morphology Development

Aluminophosphate molecular sieves (AlPO4-5s) with fibrous morphology were readily prepared via hydrothermal method at 180 °C with the initial molar ratio of Al(OiPr)3: H3PO4: TrPA: HF: H2O as 1: 0.83: 1: 0.8: 70. The morphology and structure of the prepared AlPO4-5s were characterized by XRD, SEM, TEM and nitrogen sorption measurement. The morphology development and structure evolution mechanism were proposed.

Facile synthesis of shape-controlled graphene–polyaniline composites for high performance supercapacitor electrode materials

2015 ◽  
Vol 39 (3) ◽  
pp. 2261-2268 ◽  
Author(s):  
Xiaomiao Feng ◽  
Ningna Chen ◽  
Jinhua Zhou ◽  
Yi Li ◽  
Zhendong Huang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
High Performance ◽  
Electrode Materials ◽  
Excellent Performance ◽  
Facile Synthesis ◽  
Supercapacitor Electrode ◽  
Facile Hydrothermal Method ◽  
Shape Controlled ◽  
Polyaniline Composites ◽  
Supercapacitor Electrode Materials

The shape-controlled graphene–PANI nanocomposites showing excellent performance as supercapacitor electrode materials were successfully prepared by a facile hydrothermal method without any surfactants.

scholarly journals Facile synthesis of nanocrystalline-assembled nest-like NiO hollow microspheres with superior lithium storage performance

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31287-31297 ◽  
Author(s):  
Yanwei Li ◽  
Yuanyuan Zheng ◽  
Jinhuan Yao ◽  
Jianrong Xiao ◽  
Jianwen Yang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hollow Microspheres ◽  
Facile Synthesis ◽  
Lithium Storage ◽  
Facile Hydrothermal Method ◽  
Storage Performance

Interconnected nest-like NiO hollow microspheres assembled from nanocrystallites are prepared by a facile hydrothermal method followed by annealing at 700 °C in air.

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