Synthesis of titania nanoparticles via spark discharge method using air as a carrier

被引：9

作者：

Oh, Hyuncheol ^{[1
]}

Ji, Junho ^{[2
]}

Jung, Jaehee ^{[1
]}

Kim, Sangsoo ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Aerosol & Particle Technol Lab, 373-1,Guseong-dong, Taejon 305701, South Korea

[2] Samsung Elect Co LTD, Digital Appliance R&D Ctr, Future Device Lab, Suwon 443742, South Korea

来源：

ECO-MATERIALS PROCESSING AND DESIGN VIII | 2007年 / 544-545卷

关键词：

spark discharge; titania nanoparticle; aerosol process;

D O I：

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

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：143 / +

页数：2

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