Synthesis of TiO2 nanoparticles by propane/air turbulent flame CVD process--颗粒学报PARTICUOLOGY

Xie, H., Gao, G., Tian, Z., Bing, N., & Wang, L. (2009). Synthesis of TiO2 nanoparticles by propane/air turbulent flame CVD process. Particuology, 7(3), 204–210. https://doi.org/10.1016/j.partic.2009.03.003

Synthesis of TiO₂ nanoparticles by propane/air turbulent flame CVD process

Hongyong Xie^*, Guilan Gao, Zhen Tian, Naici Bing, Lijun Wang

School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, 2360 Jin Hai Road, Pudong, Shanghai 201209, China

10.1016/j.partic.2009.03.003

Volume 7, Issue 3, June 2009, Pages 204-210

Received 6 July 2008, Accepted 4 March 2009, Available online 16 April 2009.

E-mail: hyxie@eed.sspu.cn; hyxie@163.com

Highlights

Abstract

Synthesis of TiO₂ nanoparticles by the oxidation of titanium tetrachloride (TiCl₄) in high-strength propane/air turbulent flame is investigated tentatively for mass production of TiO₂ nanoparticles. Effects of reactor heat flux varying from 247 to 627 kJ/m² s, initial TiO₂ number density from 2 × 10²⁰ to 1 × 10²¹ m⁻³, and apparent residence time of TiO₂ nanoparticles in reactor from 0.06 to 0.9 s, on particle morphology, phase composition, UV absorption and photoluminescence (PL) spectra are studied. The TiO₂ nanoparticles synthesized, with mean size of 30–80 nm and rutile mass fraction from 0.155 up to 0.575, exhibited a strong PL signal at the wavelength of 370–450 nm, with a wide peak signal at 400–420 nm, reflecting significant oxygen vacancies on the surface of the TiO₂ nanoparticles.

Graphical abstract

Keywords

CVD; Turbulent flame; TiO₂ nanoparticles; PL spectra

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