Crystal structure and magnetic and photocatalytic properties of a new ternary rare-earth mixed chalcogenide, Dy4S4Te3

2014 ◽  
Vol 2 (48) ◽  
pp. 20621-20628 ◽  
Author(s):  
Sheng-Ping Guo ◽  
Guo-Cong Guo
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Rare Earth ◽  
High Temperature ◽  
Solid State ◽  
Rhodamine B ◽  
Solid State Reaction ◽  
Energy Gap ◽  
Halogen Lamp ◽  
Polycrystalline Powder

New mixed-chalcogenide Dy4S4Te3 was synthesized by a facile high-temperature solid-state reaction based on energy gap engineering, polycrystalline powder shows photocatalytic activity for the decomposition of rhodamine B under halogen lamp irradiation.

SYNTHESIS, MORPHOLOGY AND STRUCTURAL PROPERTIES OF (GD,ND)SR2RUCU2O8 SAMPLES

2003 ◽  
Vol 17 (04n06) ◽  
pp. 899-904 ◽  
Author(s):  
A. VECCHIONE ◽  
M. GOMBOS ◽  
C. TEDESCO ◽  
A. IMMIRZI ◽  
L. MARCHESE ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solid State ◽  
Powder Diffraction ◽  
Solid State Reaction ◽  
X Ray ◽  
Structure And Morphology ◽  
Polycrystalline Powder ◽  
Scanning Electron

NdSr 2 RuCu 2 O x material has been prepared as polycrystalline powder by solid state reaction. The compound has been investigated by synchrotron x-ray powder diffraction and scanning electron microscopy. The experimental results show that the average crystal structure is a disordered cubic perovskite with Nd and Sr cations occupying the same site and the same substitution is found for Cu and Ru atoms. A comparison between the crystal structure and morphology of this compound and the superconducting tetragonal GdSr 2 RuCu 2 O 8 is also discussed.

Preparation of Layered Potassium Titanate

2008 ◽  
Vol 368-372 ◽  
pp. 1463-1464 ◽  
Author(s):  
Lu Ting Yan ◽  
Wen Jie Si ◽  
Feng Teng ◽  
Yan Peng Zheng ◽  
Chun Ai Dai
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Solid State ◽  
Stearic Acid ◽  
Solid State Reaction ◽  
Potassium Titanate ◽  
Important Intermediate

Layered potassium titanate is an important intermediate in preparing titania nanosheets. Three methods including method of potassium stearate, method of stearic acid and method of high-temperature solid-state reaction were used to produce layered potassium titanate in this paper. XRD and SEM were used to characterize the crystal structure and shape. The result of experiments showed that method of potassium stearate was the most effective way to prepare the layered potassium titanate.

Photocatalytic Water Splitting and Photocatalytic Degradation in Aqueous GdVO4 Suspensions under Simulated Solar Irradiation

2013 ◽  
Vol 873 ◽  
pp. 571-574 ◽  
Author(s):  
Yan Bai ◽  
Ya Ming Ding ◽  
Zhi Min Li
Keyword(s):  
Photocatalytic Activity ◽  
High Temperature ◽  
Solid State ◽  
Water Splitting ◽  
Rhodamine B ◽  
Pure Water ◽  
Xrd Analysis ◽  
Solar Irradiation ◽  
Tetragonal Type ◽  
Simulated Solar Irradiation

GdVO4 was synthesized by solid state reaction at high temperature and characterized by XRD, UVvisible DRS, BET and SEM. XRD analysis of GdVO4 showed its structure was of tetragonal type. When GdVO4 was loaded with 0.3 wt% Pt, it showed the better photocatalytic activity for water splitting under simulated solar irradiation, and the amounts of the produced hydrogen in pure water were about 9.33 μmol under the irradiation of simulated solar for 6 h. Furthermore, photodegradation of Rhodamine B (Rh B ) on the samples were investigated under simulated solar irradiation.

scholarly journals Expanding Family of Litharge-Derived Sulfate Minerals and Synthetic Compounds: Preparation and Crystal Structures of [Bi2CuO3]SO4 and [Ln2O2]SO4 (Ln = Dy and Ho)

Minerals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 887
Author(s):  
Oleg Siidra ◽  
Dmitri Charkin ◽  
Igor Plokhikh ◽  
Evgeny Nazarchuk ◽  
Astrid Holzheid ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Rare Earth ◽  
High Temperature ◽  
Solid State ◽  
Structure Type ◽  
Structural Studies ◽  
Synthetic Compounds ◽  
High Pressure High Temperature ◽  
In Cis

During the last decades, layered structures have attracted particular and increasing interest due to the multitude of outstanding properties exhibited by their representatives. Particularly common among their archetypes, with a significant number of mineral and synthetic species structural derivatives, is that of litharge. In the current paper, we report the structural studies of two later rare-earth oxysulfates, [Ln2O2]SO4 (Ln = Dy, Ho), which belong indeed to the grandreefite family, and a novel compound [Bi2CuO3]SO4, which belongs to a new structure type and demonstrates the second example of Cu2+ incorporation into litharge-type slabs. Crystals of [Bi2CuO3]SO4 were obtained under high-pressure/high-temperature (HP/HT) conditions, whereas polycrystalline samples of [Ln2O2]SO4 (Ln = Dy, Ho) compounds were prepared via an exchange solid-state reaction. The crystal structure of [Bi2CuO3]SO4 is based on alternation of continuous [Bi2CuO3]2+ layers of edge-sharing OBi2Cu2 and OBi3Cu tetrahedra and sheets of sulfate groups. Cu2+ cations are in cis position in O5Bi2Cu2 and O6Bi2Cu2 oxocentered tetrahedra in litharge slab. The crystal structure of [Ln2O2]SO4 (Ln = Dy, Ho) is completely analogous to those of grandreefite and oxysulfates of La, Sm, Eu, and Bi.

Novel bismuth activated blue-emitting phosphor Ba2Y5B5O17:Bi3+ with strong NUV excitation for WLEDs

2019 ◽  
Vol 7 (36) ◽  
pp. 11227-11233 ◽  
Author(s):  
Xiu Wang ◽  
Jia Wang ◽  
Xingyu Li ◽  
Haoyang Luo ◽  
Mingying Peng
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Solid State Reaction ◽  
Rare Earth Ion ◽  
Reaction Route ◽  
Light Emitting ◽  
Solid State Reaction Route ◽  
White Light Emitting Diodes

In this work, a series of novel non-rare-earth ion activated phosphors Ba2Y5−xB5O17:xBi3+ for white light-emitting diodes (WLEDs) was prepared via the high temperature solid state reaction route.

Photoluminescence properties of Pr3+, Sm3+ and Tb3+ doped SrAlSi4N7 and energy level locations of rare-earth ions in SrAlSi4N7

2014 ◽  
Vol 2 (37) ◽  
pp. 7952-7959 ◽  
Author(s):  
Zhi-Jun Zhang ◽  
Otmar M. ten Kate ◽  
Anneke Delsing ◽  
Pieter Dorenbos ◽  
Jing-Tai Zhao ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Solid State ◽  
Energy Level ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Rare Earth Ions ◽  
Photoluminescence Properties ◽  
Reaction Method

RE3+ (RE = Pr, Sm, and Tb)-doped SrAlSi4N7 samples were synthesized by a solid-state reaction method at high temperature, and their photoluminescence properties were investigated.

Crystal structure and X-ray diffraction data of a new hexagonal perovskite compound, Ba4CuNb3O12

2011 ◽  
Vol 26 (3) ◽  
pp. 244-247
Author(s):  
N. Kumada ◽  
W. Zhang ◽  
Q. Dong ◽  
T. Mochizuki ◽  
Y. Yonesaki ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Chemical Composition ◽  
Solid State ◽  
Diffraction Data ◽  
Solid State Reaction ◽  
Inert Atmosphere ◽  
X Ray Diffraction ◽  
X Ray ◽  
Barium Copper

A new barium copper niobate, Ba4CuNb3O12, was successfully prepared by high-temperature solid-state reaction in an inert atmosphere. Rietveld-refinement analysis of the XRD data of the compound showed that it has the 8H-type hexagonal perovskite structure with space group P63/mmc (#194), a = 5.830(1) Å, c = 19.123(1) Å, and chemical composition of Ba4Cu1.84Nb2.16O12-δ.

scholarly journals Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO4:Ce3+, Tb3+ phosphors for UV-based LEDs

RSC Advances ◽  
2020 ◽  
Vol 10 (37) ◽  
pp. 21867-21875
Author(s):  
K. Saidi ◽  
M. Dammak
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
High Temperature ◽  
Solid State ◽  
Optical Spectroscopy ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Transfer Properties

A series of Ce3+, Tb3+ and, Ce3+/Tb3+ doped NaZnPO4(NZPO) phosphors synthesized via the high-temperature solid-state reaction method were investigated.

scholarly journals Highly improved photocatalytic degradation of rhodamine B over Bi2Ga4−xFexO9 solid solutions under visible light irradiation

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 26894-26901 ◽  
Author(s):  
Jia Yang ◽  
Xiaorui Sun ◽  
Chunmei Zeng ◽  
Xiaoting Wang ◽  
Yilan Hu ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Solid Solutions ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Solid State Reaction ◽  
Light Irradiation

In this work, Bi2Ga4−xFexO9 (0 ≤ x ≤ 1.2) solid solutions were prepared via the traditional high-temperature solid-state reaction.

Fabrication of Pyrochlore Gd2Zr2O7 by High Temperature Solid State Reaction

2014 ◽  
Vol 1061-1062 ◽  
pp. 87-90 ◽  
Author(s):  
Long Fan ◽  
Yi Xie ◽  
Xiao Yan Shu
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Atmospheric Pressure ◽  
Raw Materials ◽  
Pyrochlore Structure ◽  
Structure And Microstructure ◽  
Sem Studies

In order to investigate the fabrication of pyrochlore Gd2Zr2O7, Gd2O3 and ZrO2 were used as raw materials in the process. Pyrochlore Gd2Zr2O7 were fabricated by high temperature solid state reaction at 1100 – 1600 °C under atmospheric pressure for 72 h. XRD and SEM studies were exploited to characterize the crystal structure and microstructure of the synthetic samples. The results revealed that Gd2Zr2O7 with a single pyrochlore structure was fabricated successfully at 1500 °C. The microstructure of the sample was uniform and dense, and the grain size was in the range of 1 - 3 μm.

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