scholarly journals Synthesis and photocatalytic property of Zinc Oxide (ZnO) fine particle using flame spray pyrolysis method

2018 ◽  
Vol 1025 ◽  
pp. 012004 ◽  
Author(s):  
Hendri Widiyandari ◽  
Ngurah Ayu Ketut Umiati ◽  
Rizki Dwi Herdianti
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Fine Particle ◽  
Photocatalytic Property ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Pyrolysis Method

scholarly journals CoAl2O4 blue nanopigments prepared by liquid-feed flame spray pyrolysis method

2015 ◽  
Vol 20 (3) ◽  
pp. 580-587 ◽  
Author(s):  
Natalia Betancur Granados ◽  
Eongyu Yi ◽  
Richard Laine ◽  
Oscar Jaime Restrepo Baena
Keyword(s):  
Spray Pyrolysis ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Liquid Feed ◽  
Pyrolysis Method

Structural and luminescence properties of undoped, Nd3+ and Er3+ doped TiO2 nanoparticles synthesized by flame spray pyrolysis method

2016 ◽  
Vol 42 (9) ◽  
pp. 10579-10586 ◽  
Author(s):  
Serdar Yildirim ◽  
Metin Yurddaskal ◽  
Tuncay Dikici ◽  
Idil Aritman ◽  
Kadriye Ertekin ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Tio2 Nanoparticles ◽  
Luminescence Properties ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Doped Tio2 ◽  
Pyrolysis Method

scholarly journals Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method

Nova Scientia ◽  
2021 ◽  
Vol 13 (27) ◽  
Author(s):  
Alejandro Ortiz-Morales ◽  
Manuel García-Hipólito ◽  
Epifanio Cruz-Zaragoza ◽  
Ramón Gómez-Aguilar
Keyword(s):  
Zinc Oxide ◽  
Gamma Radiation ◽  
Spray Pyrolysis ◽  
Oxide Films ◽  
Spray Pyrolysis Method ◽  
Order Kinetic ◽  
Zinc Oxide Films ◽  
Pyrolysis Method ◽  
Wide Range ◽  
Doped Zno

High gamma dose-resistant undoped ZnO and Tb-doped ZnO thermoluminescent (TL) micro-phosphors were prepared by the spray pyrolysis method. Scanning electron microscopy shows crystalline rods with hexagonal morphology, (0.1-0.4 µm diameter, and about 1 µm length). Raman spectra dispersion reveals a würtzite form. Photoluminescence (PL) study of irradiated zinc oxide films indicates the generation of defects produced by gamma irradiation resulting in an increased probability of electron-hole exciton recombination. PL spectrum shows emission bands from 5D4-7Fj=6,5,4,3 transitions ascribed to Tb3+ dopant in zinc oxide phosphor. X-ray diffraction patterns for both types of films growth (undoped ZnO and Tb-doped ZnO) are typical of zinc oxide crystalline structure, with no noticeable effect of Tb ions. Dosimetric properties, for both samples, show a low TL fading signal and TL reproducibility signal for undoped ZnO and Tb-doped ZnO samples was 29 and 57 %, respectively. The kinetic parameters such as activation energy E, frequency factor s, and Rm values, were obtained by Computerized Glow Curve Deconvolution (CGCD) assuming Mixed Order Kinetic model (MOK). The results show that the MOK well described the glow curves of zinc oxide films. The heating rate effects produced a broadening of glow peak located at 420 K. For purposes like radiation detector, atomic effective number (Zeff) was obtained: 27.74 and 56.47 for undoped ZnO and Tb-doped ZnO samples, respectively. The samples were exposed to gamma radiation in a wide range of 0.25–20 kGy dose. TL properties of undoped ZnO and Tb-doped ZnO samples show that these materials could be used to detect high doses in a gamma radiation field.

PENGARUH LAJU ALIR GAS PEMBAKAR (LPG) TERHADAP PEMBUATAN KATALIS HETEROGEN NANOKOMPOSIT ZnO/Fe 2 O 3

EKUILIBIUM ◽  
2014 ◽  
Vol 13 (2) ◽  
Author(s):  
Arif Jumari
Keyword(s):  
Spray Pyrolysis ◽  
Alternative Energy ◽  
Particle Diameter ◽  
Precursor Solution ◽  
Flame Spray Pyrolysis ◽  
Esterification Reaction ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Bag Filter ◽  
Bet Analysis

<p>Abstract: Biodiesel as alternative energy can be produced by trans-esterification reaction of<br />vegetable oils or animal oils with homogeneous or heterogeneous catalysts. Heterogeneous<br />catalysts have several advantages over homogeneous catalysts that it is easier to be separated.<br />ZnO is one of the compounds that it has very high catalytic properties with a yield of 86.1%.<br />Making the catalyst is easier to be separated, Fe<br />2<br />O<br />3<br />is added to the matrix of ZnO. This<br />research was conducted to determine the effect of flow rate of burner gas (LPG) to the size of<br />catalyst particles with a fixed precursor composition (1:1) using a flame spray pyrolysis method.<br />The first procedure performed was nebulizing the precursor solution of Zn(NO<br />3<br />,<br />then the droplet was flowed through the tube to the burner. At the same time, turning on the<br />carrier gas and the burner gas (LPG) through inner pipe and annulus. Solids from the<br />combustion in the burner were sipped with exhauster and solid nanoparticles were filtered using<br />a bag filter. Then the solid product were separated from bag filter for further analysis. The<br />results were analyzed by XRD, SEM, and BET. From the results of XRD analysis, it was known<br />that the nanocomposite particles obtained were ZnO/Fe<br />2<br />O<br />3<br />. The results of SEM analysis<br />showed that the particles only have some nano-sized particles. They consisted of particles of<br />about 1 nm to 100 nm with percentage 35%; some submicron-sized particles (101 nm to 500<br />nm with percentage 45%; and some micron-sized particles (more than 500 nm) with percentage<br />20%. While the results of BET analysis described the specific area of particles, so that the<br />particle diameter could be calculated. It showed that the particles were nano-sized, namely<br />26.652 – 133.771 nm.<br />Keywords: nanocomposite, burner gas, flame spray pyrolysis<br />)2<br />and Fe(NO<br />3<br />)3</p>

Synthesis of Yttria-Stabilized Zirconia Particles by Flame Spray Pyrolysis Method

2012 ◽  
Vol 629 ◽  
pp. 70-74
Author(s):  
Xiong Zhou ◽  
Wen Jun Kong
Keyword(s):  
Spray Pyrolysis ◽  
Synthesis Method ◽  
Precursor Solution ◽  
Yttria Stabilized Zirconia ◽  
Flame Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Flame Spray ◽  
Stabilized Zirconia ◽  
Barrier Coating ◽  
Size And Morphology

This paper presented a novel synthesis method for yttria-stabilized zirconia (YSZ) by using the flame spray pyrolysis (FSP) method. Spherical and dense YSZ particles for thermal barrier coating were successfully synthesized by FSP from the nebulized precursor solution. XRD results revealed that the YSZ powder is only composed of tetragonal phase particles. Most particles are a few hundred nanometers in diameter and their sizes are mainly dependent on the concentration of the precursor solution, while flame condition has little effect. Particle size and morphology are greatly affected by the precursor composition. Particles synthesized from ethanol precursor solution are more uniform and better-defined than those from aqueous solution.

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