ChemInform Abstract: Mn4+Doped (NH4)2TiF6and (NH4)2SiF6Micro-Crystal Phosphors: Synthesis Through Ion Exchange at Room Temperature and their Photoluminescence Properties.

ChemInform ◽  
2016 ◽  
Vol 47 (44) ◽  
Author(s):  
Luqing Xi ◽  
Yuexiao Pan ◽  
Shaoming Huang ◽  
Guokui Liu
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Photoluminescence Properties

Mn4+doped (NH4)2TiF6and (NH4)2SiF6micro-crystal phosphors: synthesis through ion exchange at room temperature and their photoluminescence properties

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76251-76258 ◽  
Author(s):  
Luqing Xi ◽  
Yuexiao Pan ◽  
Shaoming Huang ◽  
Guokui Liu
Keyword(s):  
Reaction Mechanism ◽  
Ion Exchange ◽  
Room Temperature ◽  
Luminescence Properties ◽  
Photoluminescence Properties

Two red micro-crystal phosphors: (NH4)2TiF6:Mn4+and (NH4)2SiF6:Mn4+have been obtained through ion exchange at room temperature for a few hours. The reaction mechanism and luminescence properties of them have been comprehensively invested.

A facile room temperature chemical transformation approach for binder-free thin film formation of Ag2Te and lithiation/delithiation chemistry of the film

2016 ◽  
Vol 45 (43) ◽  
pp. 17312-17318 ◽  
Author(s):  
Eun-Kyung Kim ◽  
Dasom Park ◽  
Nabeen K. Shrestha ◽  
Jinho Chang ◽  
Cheol-Woo Yi ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Aqueous Solution ◽  
Ion Exchange ◽  
Chemical Transformation ◽  
Room Temperature ◽  
Film Formation ◽  
Synthetic Method ◽  
Binder Free ◽  
Thin Film Formation

An aqueous solution based synthetic method for binder-free Ag2Te thin films using ion exchange induced chemical transformation of Ag/AgxO thin films.

Synthesis and Photoluminescence Properties of Novel SnO2 Zigzag Nanoribbons

2010 ◽  
Vol 97-101 ◽  
pp. 4213-4216
Author(s):  
Jian Xiong Liu ◽  
Zheng Yu Wu ◽  
Guo Wen Meng ◽  
Zhao Lin Zhan
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Ceramic Boat

Novel single-crystalline SnO2 zigzag nanoribbons have been successfully synthesized by chemical vapour deposition. Sn powder in a ceramic boat covered with Si plates was heated at 1100°C in a flowing argon atmosphere to get deposits on a Si wafers. The main part of deposits is SnO2 zigzag nanoribbons. They were characterized by means of X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). SEM observations reveal that the SnO2 zigzag nanoribbons are almost uniform, with lengths near to several hundred micrometers and have a good periodically tuned microstructure as the same zigzag angle and growth directions. Possible growth mechanism of these zigzag nanoribbons was discussed. A room temperature PL spectrum of the zigzag nanoribbons shows three peaks at 373nm, 421nm and 477nm.The novel zigzag microstructures will provide a new candidate for potential application.

Photoluminescence of Ca4Ga2S7:Eu2+ in wide excitation intensity and temperature range

2021 ◽  
pp. 2150392
Author(s):  
B. D. Urmanov ◽  
M. S. Leanenia ◽  
G. P. Yablonskii ◽  
O. B. Taghiyev ◽  
K. O. Taghiyev ◽  
...  
Keyword(s):  
Room Temperature ◽  
Laser Excitation ◽  
Excitation Intensity ◽  
Temperature Measurements ◽  
Constant Time ◽  
Photoluminescence Properties ◽  
Temperature Range ◽  
Chalcogenide Semiconductors ◽  
Time Frames

Photoluminescence properties of [Formula: see text] chalcogenide semiconductors have been studied under the impulse laser excitation in the range of 10–105 W/cm2 at room temperature. This study has shown that as a result of excitation, photoluminescence of [Formula: see text] is characterized by the emission in the interval of 450–575 nm with significant domination in the spectra line at 660 nm. Photoluminescence of [Formula: see text] quenches at wavelengths of 560 nm and 660 nm with constant time frames 258 ns and 326 ns, respectively. Moreover, the temperature measurements of photoluminescence were performed on the samples in the temperature range of 10–300 K.

Study of Photoluminescence Properties of CuxO Thin Films Prepared by Reactive Radio Frequency Magnetron Sputtering

2015 ◽  
Vol 1792 ◽  
Author(s):  
Jiantuo Gan ◽  
Augustinas Galeckas ◽  
Vishnukanthan Venkatachalapathy ◽  
Heine N. Riise ◽  
Bengt G. Svensson ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Radio Frequency ◽  
Room Temperature ◽  
Quartz Substrate ◽  
Rf Magnetron Sputtering ◽  
Considerable Improvement ◽  
Photoluminescence Properties ◽  
Radio Frequency Magnetron Sputtering ◽  
Room Temperature Photoluminescence

ABSTRACTCuxO thin films have been deposited on a quartz substrate by reactive radio frequency (rf) magnetron sputtering at different target powers Pt (140-190 W) while keeping other growth process parameters fixed. Room-temperature photoluminescence (PL) measurements indicate considerable improvement of crystallinity for the films deposited at Pt>170 W, with most pronounced excitonic features being observed in the film grown using Pt=190 W. These results corroborate well with the surface morphology of the films, which was found more flat, smooth and homogeneous for Pt >170 W films in comparison with those deposited at lower powers.

scholarly journals Powder XRD Study of Changes of Cd2+ Modified Clinoptilolite at Different Stages of the Ion Exchange Process

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1130
Author(s):  
Louiza Dimowa ◽  
Yana Tzvetanova
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Exchange Process ◽  
Unit Cell ◽  
Powder Xrd ◽  
Structural Refinement ◽  
Ion Exchange Process ◽  
Xrd Study ◽  
Modified Clinoptilolite

Cadmium exchange on clinoptilolite is performed and structurally studied for different durations of the ion exchange process (2 h, 24 h, 72 h, 168 h, 12 days, 22 days) at room temperature and 90 °C. The distribution of Cd2+ ions in all samples is elucidated after exchange on clinoptilolite using powder XRD data processed by Rietveld structural software. Clinoptilolite is not selective for cadmium cations, but at 90 °C the exchange is ~2.5 cations per unit cell. At RT it reaches ~1.25 cations per unit cell being twice as low. The obtained maximum exchanged sample for 22 days 90 °C was structurally refined in order to find the cadmium positions in the clinoptilolite voids. The structural refinements of the occupations of the incoming and outgoing cations give an idea of how the intracrystalline diffusion is processed. A good correlation between results obtained by structural refinement of the Cd-exchanged samples and the data of the EDS measurements was achieved.

Temperature Sensitive and Reversible Halide Ion Exchange in Inorganic–Organic Hybrid CH3NH3PbI3−xBrx Mixed-Halide Perovskite

2021 ◽  
Vol 16 (4) ◽  
pp. 670-674
Author(s):  
Shuting Cui ◽  
Xun Sun ◽  
SiWen Tao ◽  
Huawei Zhou ◽  
Jie Yin ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Exchange ◽  
Band Gap ◽  
Room Temperature ◽  
Temperature Sensitive ◽  
Mechanism Study ◽  
Interesting Phenomenon ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Halide Perovskite

Ion exchange of organic-inorganic hybrid perovskite plays a significant role in controlling the performance of materials ant its devices. In this study, an interesting phenomenon was observed that the precipitate in suspension (CH3NH3PbI3−xBrx in γ-butyrolactone) brought out different colors at high and room temperature. The mechanism study appears that the phenomenon is controlled by temperature sensitive and reversible halide ion exchange in organic-inorganic hybrid CH3NH3PbI3−xBrx mixed-halide perovskite. The results of structure phase, element composition morphology and band gap illustrate that high temperature 55 °C is beneficial to the increasing of I content in MAPbI3−xBrx and room temperature or lower is advantageous to increasing of Br content in MAPbI3−xBrx. Compared with MAPbI0.76Br2.24 precipitate acquired at room temperature, MAPbI1.17Br1.83 precipitate got at high temperature illustrate wider lattice spacing, better crystallinity, better morphology and narrower band gap. The results and findings in this study will prompt the interest of readers or experts in the field of organic-inorganic hybrid perovskite materials and related optoelectronic applications.

Photoluminescence properties of YVO 4 :Eu 3+ ,Ba 2+ nanoparticles prepared by an ion exchange method

2016 ◽  
Vol 41 ◽  
pp. 233-239 ◽  
Author(s):  
Yucheng Zhan ◽  
Guoping Du ◽  
Nan Chen ◽  
Yingyi Li ◽  
Bingfa Liu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Photoluminescence Properties ◽  
Exchange Method ◽  
Ion Exchange Method

Synthesis of Epihalohydrins by Dehydrohalogenation of Glycerol Dihalohydrins - Utilization of a Basic Ion-Exchange Resin

1992 ◽  
Vol 45 (8) ◽  
pp. 1327
Author(s):  
M Dargelos ◽  
ME Borredon ◽  
A Gaset
Keyword(s):  
Reaction Time ◽  
Ion Exchange ◽  
Room Temperature ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Organic Medium ◽  
Short Reaction Time ◽  
Hydrolysis Of

Dehydrohalogenation of a mixture of glycerol 1,3- and 2,3-dihalohydrins by a strong basic ion-exchange resin (IRA 440 and A 26) at room temperature in an organic medium quantitatively leads to the corresponding epihalohydrin (1a; X = Cl), and (1b; X = Br) in a very short reaction time. Hydrolysis of the epihalohydrin does not occur under these conditions.

Measurement of Serum Ionized Calcium with the Ion-Exchange Electrode

1972 ◽  
Vol 18 (12) ◽  
pp. 1459-1462 ◽  
Author(s):  
V L Subryan ◽  
M M Popovtzer ◽  
S D Parks ◽  
E B Reeve
Keyword(s):  
Ion Exchange ◽  
Reproducibility Of Results ◽  
Room Temperature ◽  
Calcium Concentration ◽  
Ionized Calcium ◽  
Control Solution ◽  
Electrode Response ◽  
Serum Ionized Calcium ◽  
Evacuated Tubes

Abstract We found no differences in pH or ionized calcium concentration of serum from blood either collected into evacuated tubes or collected with syringes and separated under oil. Sera can be stored frozen in 1-ml plastic insulin-type syringes for one to three days without significant changes in pH or ionized calcium concentration, whereas storage under oil with or without re-equilibration with CO2 is associated with significant changes in both. Standards prepared with trypsin and triethanolamine give faster electrode response, and their ionized calcium concentrations remain unchanged for 6 h at room temperature. We suggest a not entirely satisfactory control solution of buffered protein, for use in assessing reproducibility of results.

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