In-Situ TEM Observation on Phase Formation of TiO2 Nanoparticle Synthesized by Flame Method

Hoon  Park; H.S. Jie; Kyou Hyun Kim; Jae Pyong Ahn; Jong Ku Park

doi:10.4028/www.scientific.net/MSF.534-536.81

Paper Titles

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Hybrid Atomization Method for Manufacturing Fine Spherical Metal Powder
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Hydrogen Storage Properties of Nb-Zr-Fe Alloys Disintegrated by Hydrogen Gas
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Hydrothermal Synthesis of Rod-Like Copper Oxide Crystals
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In-Situ TEM Observation on Phase Formation of TiO₂ Nanoparticle Synthesized by Flame Method
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Large Scale Production of Nanoparticles by Laser Pyrolysis
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Microstructure and Properties of Plasma Spray Coatings Prepared from Ti-Zr-Ni Quasicrystalline Powders
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Milling and Sintering Behavior of the Metal-Ceramic Mixed Powders
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Organic-Inorganic Nano Composite Membranes of Sulfonated Poly(ether Sulfone-Ketone) Copolymer and SiO₂ for Fuel Cell Application
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HomeMaterials Science ForumMaterials Science Forum Vols. 534-536In-Situ TEM Observation on Phase Formation of TiO2...

In-Situ TEM Observation on Phase Formation of TiO₂ Nanoparticle Synthesized by Flame Method

Abstract:

TiO2 nanoparticle was synthesized by the flame method using a metal organic precursor of titanium tetraisopropoxide (TTIP, Ti(OC3H7)4), which was controlled by varying the ratio and flow rate of gas mixtures consisting of oxygen (oxidizer), methane (fuel) and nitrogen (carrier gas). The morphology and the size distribution of nanoparticles were observed with TEM and FESEM, and the phase evolution was analyzed by XRD measurement using a monochromator. The crystalline phases of TiO2 nanoparticle depended strongly on the temperature distribution in the flame, whereas the morphology was not sensitive. During the flame synthesis of TiO2 nanoparticle, anatase TiO2 nanoparticle was predominantly synthesized at the high flame temperature and rapid flame cooling condition. The low flame temperature and long flame length enabled to form almost rutile TiO2 nanoparticle (>95%). The anatase nanoparticle was formed by a homogeneous nucleation and has finally kept the anatase phase without the phase transformation any more in the flame. However, the rutile TiO2 nanoparticle was not formed directly and homogeneously in flame, and was manufactured by the phase transformation such as amorphousanataserutile. It was proved that the rutile phase was nucleated heterogeneously from the amorphous or anatase particles.