Synthesis of Titania Nanoparticles via Spark Discharge Method Using Air as a Carrier

Hyun Cheol Oh; Jun Ho Ji; Jae Hee Jung; Sang Soo Kim

doi:10.4028/www.scientific.net/MSF.544-545.143

Paper Titles

Preparation of TiO₂/SiO₂ Hybrid Hardcoatings on Stainless Steel and its Photocatalytic Effect
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Removal of Heavy Metal Ions from Aqueous Solution by Manganese Dioxide-Coated Polypropylene Granules: An Implication of Rainwater Runoff Treatment
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Removing Algae with Pt-Doped TiO₂ Coatings on Foamed Glass
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Suspension Stability of BaTiO₃ Nanoparticles under Electrical Applied Field
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Synthesis of Titania Nanoparticles via Spark Discharge Method Using Air as a Carrier
p.143

Synthesis, Preparation and Catalytic Activities of V-Doped TiO₂ Gel Coating on Porous α-Al₂O₃ Beads
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The Effect of Isothermal Heat Treatment on the Rolling Contact Fatigue of Carburized Low Carbon Microalloyed Steel
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Mechanism of PVC’s Solid-Phase Photocatalytic Degradation Enhanced by Plasma
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Titania Coating of Wasted Silica Particles and their Photocatalytic Property
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Synthesis of Titania Nanoparticles via Spark Discharge Method Using Air as a Carrier

Abstract:

A pulsed spark-discharge aerosol generator using air as a carrier gas was successfully applied to the titania nanoparticle production. The titanium vapor evaporated by spark discharge was subsequently supersaturated and condensed to titania nanoparticles by nucleation and condensation. The size and concentration of the particles can be controlled easily using air as a carrier gas by altering the repetition frequency, capacitance, gap distance, and flow rate of the spark-discharge system. TEM observation shows that the generated particles were aggregates, which primary particle sizes are a few nanometers. The element composition of the nanoparticles was titanium and the crystal phase was amorphous. XPS analysis shows that oxidation state of generated particles corresponded to TiO2. These XPS data indicates that some fraction of the evaporated titanium vapor could be oxidized in an air atmosphere by the oxidation with oxygen. However, enough time for crystallization was lacked because of raid cooling.