Spherical SrMoO4:Eu3+ Phosphors Prepared by Spray Pyrolysis

2014 ◽  
Vol 924 ◽  
pp. 93-97 ◽  
Author(s):  
Jing Long Wu ◽  
Xia Wang ◽  
Gui Hua Peng ◽  
Zhen Hua Liang ◽  
Xiao Feng Wang
Keyword(s):  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Emission Spectra ◽  
Spherical Shape ◽  
Ammonium Molybdate ◽  
Spray Pyrolysis Method ◽  
Strontium Nitrate ◽  
Ultrasonic Spray ◽  
One Step ◽  
Template Free

SrMoO4:Eu3+ micro-spheres with well morphology were fabricated by a one-step and template-free ultrasonic spray pyrolysis method using strontium nitrate and ammonium molybdate as precursors. The as-prepared products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectra (PL). The XRD results indicate that all the XRD peaks can be indexed as SrMoO4 with a pure tetragonal scheelite structure. The SEM photographs show that the sample particles are spheres with regular spherical shape. The excitation and emission spectra demonstrate that the phosphors could be excited effectively by the ultraviolet light with wavelength 394 nm or visible blue light with wavelength 466 nm, and the highest emission peak locates at 615 nm.

Photocatalytic activity of π-conjugated conducting polymer microspheres from ultrasonic spray pyrolysis

2016 ◽  
Vol 29 (5) ◽  
pp. 616-621 ◽  
Author(s):  
Yangshuo Liu ◽  
Ming Li ◽  
Chiyang He
Keyword(s):  
Spray Pyrolysis ◽  
Conducting Polymer ◽  
Ultrasonic Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Polymer Microspheres ◽  
Efficient Catalyst ◽  
New Class ◽  
Ultrasonic Spray ◽  
Total Organic Carbon Removal ◽  
One Step

Conductive polymers have considerable interest on degradation of pollutants from textile wastewaters and appear as a new class of active photocatalysts under visible light. Poly(3,4-ethylenedioxythiophene) (PEDOT), as one of π-conjugated conducting polymer microspheres, is highly efficient catalyst in textile pollutant degradation. Ultrasonic spray pyrolysis method was used to produce spherical PEDOT particles in one step. The novel PEDOT-based photocatalysts are very stable with cycling and can be reused without appreciable loss of activity. Ag–ZnO nanocatalysts are not effective photocatalysts as compared to highly porous microspheres of PEDOT. After 240 min total processing time for the solution of phenol and RR180 under Vis irradiation, the performances of 71.6% and 78.2% for degradation and 68.3% for total organic carbon removal of RR180 were reached in the presence of the porous PEDOT photocatalysts.

SPRAY PYROLYSIS OF MANGANESE DOPED ZINC SILICATE PHOSPHOR PARTICLES

2010 ◽  
Vol 03 (02) ◽  
pp. 97-100 ◽  
Author(s):  
SANG-HUN NAM ◽  
MYOUNG-HWA KIM ◽  
JUN-YONG LEE ◽  
SANG DUCK LEE ◽  
JIN-HYO BOO
Keyword(s):  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Spherical Shape ◽  
Solution Concentration ◽  
Solid State Reaction Method ◽  
Commercial Product ◽  
Spray Pyrolysis Method ◽  
Silicate Phosphor ◽  
Ultrasonic Spray ◽  
The Mean

Spherical-shape Zn 2 SiO 4: Mn phosphor particles with the mean particle size from submicron to micron sizes were prepared by ultrasonic spray pyrolysis method. A droplet separator was introduced to control the size distribution of the phosphor particles with spherical shape. The Zn 2 SiO 4: Mn phosphor particles with 2 mol% doping concentration of manganese have decay time and have photoluminescence intensities comparable with those of the latest commercial product prepared by the solid state reaction method. The size of the phosphor particles was decreased from 1000 to 200 nm as the inorganic salt solution concentration was changed from 0 to 5 M. The phosphor particles prepared from the solutions above 0.5 M have photoluminescence intensities comparable with that of the latest commercial product.

Luminescence in a Ba(Ti,Zr)O3 Films Deposited by Ultrasonic Spray Pyrolysis Method

2012 ◽  
Vol 1481 ◽  
pp. 113-117
Author(s):  
D. Y. Medina ◽  
R. T. Hernandez ◽  
I. Hernandez ◽  
S. Orozco
Keyword(s):  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Emission Spectra ◽  
Ferroelectric Material ◽  
Morphological Properties ◽  
Spray Pyrolysis Method ◽  
Ultrasonic Spray ◽  
Pyrolysis Method ◽  
Acetyl Acetonate ◽  
Ultrasonic Spray Pyrolysis Method

ABSTRACTThe Ba(Ti,Zr)O3 powders was synthesized for many methods because its properties as a piezoelectric, dielectric and ferroelectric material that insert it as an functional material, but there is little information in the studied of its optical properties. In this work Ba(Ti,Zr)O3films were produced by ultrasonic spray pyrolysis method for optical applications. The precursors used were an barium acetyl-acetonate, titanium acetyl-acetonate, and zirconium acetyl-acetonate powders dissolved in a N-N, dimethylformamide solution. Optical and morphological properties of the films shown a non crystalline structure and its emission spectra shown a broad and intense luminescence at 468nm which correspond to visible emission in the green region.

scholarly journals Synthesis of Silica Particles Using Ultrasonic Spray Pyrolysis Method

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 463
Author(s):  
Srecko Stopic ◽  
Felix Wenz ◽  
Tatjana-Volkov Husovic ◽  
Bernd Friedrich
Keyword(s):  
Spray Pyrolysis ◽  
Sol Gel ◽  
Ultrasonic Spray Pyrolysis ◽  
Silica Particles ◽  
Cement Industry ◽  
Submicron Particles ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
X Ray ◽  
Ultrasonic Spray

Silica has sparked strong interest in hydrometallurgy, catalysis, the cement industry, and paper coating. The synthesis of silica particles was performed at 900 °C using the ultrasonic spray pyrolysis (USP) method. Ideally, spherical particles are obtained in one horizontal reactor from an aerosol. The controlled synthesis of submicron particles of silica was reached by changing the concentration of precursor solution. The experimentally obtained particles were compared with theoretically calculated values of silica particles. The characterization was performed using a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS). X-ray diffraction, frequently abbreviated as XRD, was used to analyze the structure of obtained materials. The obtained silica by ultrasonic spray pyrolysis had an amorphous structure. In comparison to other methods such as sol–gel, acidic treatment, thermal decomposition, stirred bead milling, and high-pressure carbonation, the advantage of the ultrasonic spray method for preparation of nanosized silica controlled morphology is the simplicity of setting up individual process segments and changing their configuration, one-step continuous synthesis, and the possibility of synthesizing nanoparticles from various precursors.

Preparation of Titanium-doped Indium Oxide Films by Ultrasonic Spray Pyrolysis Method

2013 ◽  
Vol 454 (1) ◽  
pp. 63-69
Author(s):  
Surapong Panyata ◽  
Sukum Eitssayeam ◽  
Gobwut Rujijanagul ◽  
Tawee Tunkasiri ◽  
Sumnuk Sirisoonthorn ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Indium Oxide ◽  
Oxide Films ◽  
Ultrasonic Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Ultrasonic Spray ◽  
Pyrolysis Method ◽  
Indium Oxide Films ◽  
Ultrasonic Spray Pyrolysis Method

scholarly journals Ultraviolet and violet-blue emission of Zn doped MgO/mg(OH)2 particles prepared by one step spray pyrolysis method

2018 ◽  
Vol 1 (1) ◽  
pp. 57-66
Author(s):  
Fenfen Fenda Florena ◽  
◽  
Dwindra Wilham Maulana ◽  
Ferry Faizal ◽  
Bambang Mukti Wibawa ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Doping Concentration ◽  
Blue Emission ◽  
Spherical Shape ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
Excitation Spectra ◽  
X Ray ◽  
Pyrolysis Method ◽  
One Step

Spherical particles of Zn doped MgO were prepared by one-step spray pyrolysis method. The crystalline nature and particle size of the samples were characterized by X-ray diffraction analysis (XRD). The morphology of samples was studied by scanning electron microscope (SEM) and the presence of Zn in the sample was confirmed by energy dispersive X-ray analysis (EDX). The optical properties of the samples were investigated using photoluminescence spectroscopy (PL) analysis to obtain excitation and emission spectra of the samples. Results indicated that the doped MgO particles exhibited a cubic structure without hexagonal wurtzite structure as the Zn concentrations were increased. Spherical shape and porous particles are found with increasing of doping concentration. The optical band gap of MgO altered with the addition of doping concentration. A considerable redshift of about ~0.08 – 0.13 eV in the excitation spectra of 2.22 eV emission band was revealed in Zn doped MgO samples. It was highlighted that Zn doped MgO prepared by the spray pyrolysis generated emission at UV-Vis wavelength required for many applications.

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