scholarly journals Synthesis method comparison of compositionally complex rare‐earth based Ruddlesden–Popper n=1 T′ ‐type cuprates

2021 ◽  
Author(s):  
Brianna L. Musicó ◽  
Quinton Wright ◽  
Cordell Delzer ◽  
T. Zac Ward ◽  
Claudia J. Rawn ◽  
...  
Keyword(s):  
Rare Earth ◽  
Synthesis Method ◽  
Method Comparison

Engineering the Design of Brightly-Emitting Luminescent Nanostructured Photonic Composite Systems

2013 ◽  
Vol 66 (9) ◽  
pp. 1008 ◽  
Author(s):  
Mei Chee Tan ◽  
Dominik J. Naczynski ◽  
Prabhas V. Moghe ◽  
Richard E. Riman
Keyword(s):  
Rare Earth ◽  
Optical Waveguides ◽  
Impact Resistance ◽  
Synthesis Method ◽  
Research Progress ◽  
Design And Synthesis ◽  
Composite Systems ◽  
Rare Earth Doped

Rare-earth doped infrared emitting composites have extensive applications in integrated optical devices such as fibre amplifiers and waveguides for telecommunications, remote sensing, and optoelectronics. In addition, recent advancements in infrared optical imaging systems have expanded the biomedical applications for infrared-emitting composites in diagnosis and imaging of living tissue systems both in vitro and in vivo. Composite systems combine the advantages of polymers (light weight, flexibility, good impact resistance, improved biomedical compatibility, and excellent processability) and inorganic phosphor host materials (low phonon energy, intense emissions, chemical durability, and high thermal stability). This paper provides a brief review of our research progress in the design and synthesis of luminescent photonic nanocomposite systems comprised of rare-earth doped particulates dispersed in a continuous polymeric matrix. The design of brightly-emitting rare-earth doped materials and the influence of host and dopant chemistries on the emission properties are discussed. Methods used to assess and measure the phosphors’ performance are also evaluated in this work. This paper will also examine the solvothermal synthesis method used to control the physical and chemical characteristics of the rare-earth doped particles, and how these characteristics impact the infrared optical properties. Also presented here are recent advances reported with luminescent nanocomposite systems fabricated for optical waveguides and biomedical imaging.

Efficient Upconverting Nanophosphors for Imaging and Photodynamic Therapy

2012 ◽  
Vol 1471 ◽  
Author(s):  
Brian G. Yust ◽  
Gangadharan Ajith Kumar ◽  
Lawrence C. Mimun ◽  
Dhiraj K. Sardar
Keyword(s):  
Photodynamic Therapy ◽  
Rare Earth ◽  
Biomedical Applications ◽  
Near Infrared ◽  
High Efficiency ◽  
Synthesis Method ◽  
Spectroscopic Properties ◽  
Sodium Potassium ◽  
Infrared Excitation ◽  
Upconverting Nanophosphors

ABSTRACTErbium-Ytterbium codoped nanophosphor systems are explored for high efficiency upconversion. The NIR to visible upconversion from 1550 nm and 980 nm excitation are of particular interest to us for biomedical applications such as imaging, sensing, and photodynamic therapy. Variations in synthesis method and rare earth concentration are carried out in sodium, potassium, and transition metal based phosphor materials. The spectroscopic properties of the material dry and in biologically appropriate solution are taken. After bioconjugation, these particles will be used in a mouse model to demonstrate that cancer imaging with a near-infrared excitation source is possible.

scholarly journals Synthesis of Fe3O4@mZrO2-Re (Re = Y/La/Ce) by Using Uniform Design, Surface Response Methodology, and Orthogonal Design & Its Application for As3+ and As5+ Removal

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2177
Author(s):  
Easar Alam ◽  
Qiyan Feng ◽  
Hong Yang ◽  
Jiaxi Fan ◽  
Sameena Mumtaz ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Orthogonal Design ◽  
Uniform Design ◽  
Synthesis Method ◽  
Model Material ◽  
Langmuir Model ◽  
Molar Ratio ◽  
Order Kinetic ◽  
Order Kinetic Model

In this study, iron oxide (Fe3O4) was coated with ZrO2, and doped with three rare earth elements((Y/La/Ce), and a multi-staged rare earth doped zirconia adsorbent was prepared by using uniform design U14, Response Surface methodology, and orthogonal design, to remove As3+ and As5+ from the aqueous solution. Based on the results of TEM, EDS, XRD, FTIR, and N2-adsorption desorption test, the best molar ratio of Fe3O4:TMAOH:Zirconium butoxide:Y:La:Ce was selected as 1:12:11:1:0.02:0.08. The specific surface area and porosity was 263 m2/g, and 0.156 cm3/g, respectively. The isothermal curves and fitting equation parameters show that Langmuir model, and Redlich Peterson model fitted well. As per calculations of the Langmuir model, the highest adsorption capacities for As3+ and As5+ ions were recorded as 68.33 mg/g, 84.23 mg/g, respectively. The fitting curves and equations of the kinetic models favors the quasi second order kinetic model. Material regeneration was very effective, and even in the last cycle the regeneration capacities of both As3+ and As5+ were 75.15%, and 77.59%, respectively. Adsorption and regeneration results suggest that adsorbent has easy synthesis method, and reusable, so it can be used as a potential adsorbent for the removal of arsenic from aqueous solution.

scholarly journals A Review on Luminescent Rare Earth Complexes

2021 ◽  
pp. 69-77
Author(s):  
Qiuxin ShenQiuxin Shen ◽  
Liting Xu ◽  
Yiyan Jiang ◽  
Yiping Zhang
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Solid Phase ◽  
Synthesis Method ◽  
Rare Earth Complexes ◽  
Precipitation Method ◽  
Future Research ◽  
Phase Method ◽  
Synthesis Methods ◽  
Starting Point

At present, rare earth elements are widely used in various industries. In this paper, luminescent rare earth complexes are taken as a starting point to explore the luminescence principles of several important rare earth elements. The commonly used synthesis methods of luminescent rare earth complexes in recent year are also summarized, mainly including co-precipitation method, high temperature solid phase method, sol-gel method and hydrothermal synthesis method. And prospects for the future research on luminescent rare earth complexes are made.

Conventional synthesis and characterization of rare earth doped barium borophosphates, BaBPO5:RE (Y, Gd and La)

2016 ◽  
Vol 81 (2) ◽  
pp. 49-54
Author(s):  
G. Çelik Gül ◽  
F. Kurtuluş
Keyword(s):  
Rare Earth ◽  
Synthesis Method ◽  
Unit Cell ◽  
Synthesis And Characterization ◽  
Dihydrogen Phosphate ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Rare Earth Doped

Purpose: of this research, our target is synthesis and characterization of rare earth metalssuch as Y, Gd and La doped barium borophosphate compounds which are applicable innon-linear optics industry.Design/methodology/approach: The starting materials rare earth oxides, bariumcarbonate, boric acid and ammonium dihydrogen phosphate as analytically grade weighed0.01:1:1:1 molar ratio and homogenized in an agate mortar. The mixture placed into aporcelain crucible to heat in high temperature oven step by step. First, mixtures were waitedat 400°C for 2 hours for calcination process, subsequently heated 900°C with step rate10°C/m for 8 hours, and finally cooled down to room temperature with step rate 10°C/m.After many grindings final product get ready for characterization. X-ray powder diffraction(XRD) analysis was performed using PANanalytical X’Pert PRO Diffractometer (XRD) withCu Kα (1.5406 Å, 45 kV and 30 mA) radiation. Fourier transform infrared spectroscopy(FTIR) was taken on a Perkin Elmer Spectrum 100 FTIR Spectrometer from 4000 to 650cm-1. Scanning electron microscopy was achieved in SEM JEOL 6390-LV. Luminescenceproperties were performed by Andor Solis Sr 500i spectrophotometer. Conventional solidstate syntheses were done in Protherm furnace.Findings: The powder XRD patterns of the samples show that there is no impurity related todoping materials mean all diffractions corresponding to host material barium borophosphatecrystallized in hexagonal system with unit cell parameters a=7.1003 and c=6.9705 Å. Theunit cell parameters of rare earth doped barium borophosphates were calculated and displayboth increase and decrease depends on ionic Radius of rare earths. The other supportingmethods confirm the crystal structure and luminescence properties.Research limitations/implications: The synthesis method has some disadvantagessuch as low homogeneity, non-uniform product etc. We tried to minimize these negativeaspects in our research and succeeded.Practical implications: Phosphor materials Y:BaBPO5, Gd:BaBPO5 and La:BaBPO5(ICSD 51171) were synthesized by conventional solid state method and characterizationswas mainly based on powder X-ray diffraction pattern. Also, morphological and luminescenceproperties were completed to get the highest knowledge.Originality/value: Of the paper is first time conventional synthesis of Y, Gd and La dopedBaBPO5 compounds, calculation of unit cell parameters, and investigation of morphologicaland luminescent properties.

A convenient and efficient synthesis method to improve the emission intensity of rare earth ion doped phosphors: the synthesis and luminescent properties of novel SrO:Ce3+ phosphor

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93951-93956 ◽  
Author(s):  
Jipeng Fu ◽  
Su Zhang ◽  
Tengfei Ma ◽  
Yonglei Jia ◽  
Ran Pang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Reaction Temperature ◽  
Emission Intensity ◽  
Synthesis Method ◽  
Luminescent Properties ◽  
Efficient Synthesis ◽  
Rare Earth Ion ◽  
Harsh Conditions

A convenient and efficient synthesis method that improves the emission intensity of rare earth ion doped phosphors is proposed. This approach can greatly improve the reaction temperature and overcome the requirement for harsh conditions.

scholarly journals Characterisation of hexagonal birnessite with a new and rapid synthesis method—comparison with traditional synthesis

RSC Advances ◽  
2019 ◽  
Vol 9 (45) ◽  
pp. 25951-25956 ◽  
Author(s):  
Zhangjie Qin ◽  
Xinmin Chen ◽  
Nanqi Ouyang ◽  
Shuai Lan ◽  
Guanjie Jiang ◽  
...  
Keyword(s):  
Low Cost ◽  
Synthesis Method ◽  
Method Comparison ◽  
Physicochemical Characteristics ◽  
Rapid Synthesis ◽  
New Synthesis ◽  
Cost Characteristics

The new synthesis method of birnessite with rapid, simple, and low cost characteristics proposed in this work can be applied to industry products. Bir-H2O2 have a better physicochemical characteristics than Bir-HCl using traditional synthesis.

Sign in / Sign up

Export Citation Format

Share Document