Upconversion luminescence of lanthanide-doped mixed CaMoO4–CaWO4 micro-/nano-materials

2016 ◽  
Vol 45 (30) ◽  
pp. 12094-12102 ◽  
Author(s):  
Jing Liu ◽  
Anna M. Kaczmarek ◽  
Jonas Billet ◽  
Isabel Van Driessche ◽  
Rik Van Deun
Keyword(s):  
Heat Treatment ◽  
Upconversion Luminescence ◽  
Synthesis And Characterization ◽  
Nano Materials ◽  
Red Emission ◽  
Co Doping

The synthesis and characterization of Er3+,Yb3+ doped mixed CaMoO4–CaWO4 micro-/nano-upconversion materials is presented in this paper. The relative intensities of the green and red emission bands can be enhanced by heat treatment or through Gd3+ co-doping.

scholarly journals Synthesis and characterization of one-dimensional titanate structure

2008 ◽  
Vol 2 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Ljubica Nikolic ◽  
Marija Maletin ◽  
Paula Ferreira ◽  
Paula Vilarinho
Keyword(s):  
Heat Treatment ◽  
Structural Characteristics ◽  
Hydrothermal Process ◽  
Synthesis And Characterization ◽  
One Dimensional ◽  
Treatment Conditions ◽  
Alkaline Conditions ◽  
The Stability ◽  
Simple Hydrothermal Process

One-dimensional titania structures were synthesized trough a simple hydrothermal process in a highly alkaline conditions. The aim of this work was to elucidate the effect of time on the formation of 1D titanates as well on its structural characteristics (morphology, phase composition, surface area). Apart from that, the effect of heat treatment conditions on the stability of titanate based 1D samples has been investigated. The results have revealed that it is possible to form one-dimensional titanates already after 1 hour of hydrothermal synthesis. Although the composition of titanates is still under debate, the results probably correspond to the layered sodium titanates. The 1D prepared structures show a remarkable stability during heating, remaining the basic morphology and composition even up to 700?C.

scholarly journals Synthesis and characterization of apatite silicated powders with wet precipitation method

2021 ◽  
Vol 234 ◽  
pp. 00106
Author(s):  
Houda Labjar ◽  
Hassan Chaair
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Analytical Techniques ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wet Precipitation ◽  
Scanning Electron

The synthesis of apatite silicated Ca10(PO4)6-x(SiO4)x(OH)2-x (SiHA) with 0≤x≤2 was investigated using a wet precipitation method followed by heat treatment using calcium carbonate CaCO3 and phosphoric acid H3PO4 and silicon tetraacetate SiC8H20O4 (TEOS) in medium of water ethanol, with three different silicate concentrations. After drying, the samples are ground and then characterized by different analytical techniques like X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron Microscopy (SEM) and chemical analysis.

scholarly journals Facile synthesis of C60-nano materials and their application in high-performance water splitting electrocatalysis

2020 ◽  
Vol 4 (6) ◽  
pp. 2900-2906 ◽  
Author(s):  
Olivia Fernandez-Delgado ◽  
Alain R. Puente-Santiago ◽  
Manuel Cano ◽  
Juan J. Giner-Casares ◽  
Alejandro J. Metta-Magaña ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Synthesis And Characterization ◽  
Nano Materials ◽  
Facile Synthesis

Here, we report the synthesis and characterization of crystalline C60 nanomaterials and their applications as bifunctional water splitting catalysts.

Synthesis and characterization of macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) and its application in metal ion detection

2019 ◽  
Vol 43 (21) ◽  
pp. 8315-8324
Author(s):  
Hui Yang ◽  
Rui Wang ◽  
Yaozu Wang ◽  
Jianzhong Jiang ◽  
Xingzhong Guo
Keyword(s):  
Heat Treatment ◽  
Metal Ion ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Practical Application ◽  
Ion Detection ◽  
Gel Method ◽  
Sol Gel Method ◽  
Metal Ion Detection

Macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) was prepared via a sol–gel method followed by heat-treatment, and the resultant macroporous C12A7:Eu3+ shows potential for practical application in metal ion detection and has a good response to Pb2+ ions.

Synthesis and Characterization of In2O3 Nanobelts via Hydrothermal Route

2015 ◽  
Vol 1118 ◽  
pp. 43-46
Author(s):  
Guo Dong Liu ◽  
Yu Guang Wang ◽  
Hui Bing Lu ◽  
Yuan Tian
Keyword(s):  
Heat Treatment ◽  
Single Crystals ◽  
Hydrothermal System ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Hydrothermal Route ◽  
Pl Spectra

In the hydrothermal system, In (OH)3nanobelts were obtained. After heat-treatment at 300 °C, In2O3single crystals nanobelts were produced, which can keep the morphologies and sizes of precursors. The room temperature PL spectra of as-prepared In2O3nanobelts are also detected. PL peaks of In2O3nanobelts mainly focused at 458 nm (blue).

Synthesis and Characterization of Nanostructured TiO2-SnO2 Composite

2014 ◽  
Vol 975 ◽  
pp. 233-237
Author(s):  
Joelma C. S. Breve ◽  
Dayse I. dos Santos
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Thermal Analysis ◽  
Gas Sensors ◽  
Catalytic Properties ◽  
Rutile Phase ◽  
Synthesis And Characterization ◽  
Vis Spectroscopy ◽  
Scanning Electron

Nanostructured composites based on titanium dioxide have been studied in order to improve optical and photo-catalytic properties, as well as their performance in gas sensors. In this work, titanium and tin dioxides were simultaneously synthesized by the polyol method resulting in TiO2 platelet coated with SnO2 nanoparticles as was observed by scanning electron microscopy. The thermal analysis showed that the combined synthesis promotes more easily the crystallization of the TiO2 rutile phase. The composite obtained after heat treatment at 500 °C showed to be formed of almost only rutile phases of both oxides. The optical properties analyzed by UV-Vis spectroscopy showed that the combined oxides have higher absorbance, which reinforces a model found in the literature based on the flow of photo-generated electrons to the conduction band of SnO2 delaying the recombination of charges.

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