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Journal of Inorganic Materials

Journal of Inorganic Materials >

2010 , Vol. 25 >Issue 4: 375 - 378

DOI: https://doi.org/10.3724/SP.J.1077.2010.00375

Research Paper

Photocatalytic Properties of Nanocrystalline TiO2 Synthesized by Highpressure Microwave Method

  • LIU Yu ,
  • ZHANG Ting ,
  • FU Min-Gong ,
  • LI Wang ,
  • DU Guo-Ping
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  • 1. School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China; 2. Jiangling Holdings Limited
    Company, Jiangxi 330044, China

Received date: 2009-07-21

  Revised date: 2009-10-23

  Online published: 2010-04-27

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Abstract

Nanocrystalline TiO2 powders were synthesized from TiCl4 solution by the highpressure microwave method under pressure ranging from 0.1MPa to 4.0MPa. The phase structures, microstructures and photocatalytic properties of the nanocrystalline
TiO2 were investigated. It was found that the reaction pressure had a large impact on the phase structures, microstructures,
and photocatalytic properties of the nanocrystalline TiO2. Under lower reaction pressure, TiO2 products consisted of anatase
and brookite phase, with the brookite phase in minority, while under higher reaction pressure, a large quantity of rutile
TiO2 was formed. With the increase of reaction pressure from 0.1MPa to 4.0MPa, the average sizes of the TiO2 nanoparticles
increased from 5nm to 30nm. At reaction pressures lower than 2.0MPa, the photocatalytic performance of the nanocrystalline
TiO2 increased with the pressure, while at pressures higher than 2.0MPa, the photocatalytic performance was found to decrease
monotonically with the pressure.

Key words： high-pressure microwave synthesis; nanocrystalline TiO2; photocatalysis

Cite this article

LIU Yu , ZHANG Ting , FU Min-Gong , LI Wang , DU Guo-Ping . Photocatalytic Properties of Nanocrystalline TiO2 Synthesized by Highpressure Microwave Method[J]. Journal of Inorganic Materials, 2010 , 25(4) : 375 -378 . DOI: 10.3724/SP.J.1077.2010.00375

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