Photocatalytic activity of Zr:SrTiO3 under UV illumination

Liang Chen, Shouchen Zhang, Liqiu Wang, Dongfeng Xue, Shu Yin

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

SrTiO3 is a well-known efficient photocatalyst and has various industrial applications such as water or air purification antibacterial agents and self-cleaning surfaces. In this work, pure SrTiO3 and Zr:SrTiO3 photocatalysts were prepared by the sol-gel method and then tested by scanning electron microscopy (SEM) and X-ray diffraction, respectively. The crystal phase of Zr:SrTiO3 shows a typical perovskite structure, in which Ti sites are substituted by Zr atoms. The as-prepared yellow Zr:SrTiO3 powders were then used as UV photocatalysts. Photocatalytic degradation activity of methylene blue over zirconium-doped SrTiO3 catalysts was tested under UV illumination. The high activity of Zr:SrTiO3 was due to the defects of its crystal lattice, thus the energy needed by the semiconductor photoproduction electron transition to the conduction band was smaller than the intrinsic absorption band. The optimal conditions of our experiments are as follows: under 8% doping density of Zr, 10 mg/l initial concentration of methylene blue, 0.15 g photocatalyst dosage, 6.5 of pH value and 4 h of UV illumination time, the degradation rate of methylene blue can reach 93.6%.

Original languageEnglish
Pages (from-to)735-737
Number of pages3
JournalJournal of Crystal Growth
Volume311
Issue number3
DOIs
Publication statusPublished - 2009 Jan 15

Keywords

  • A2. Sol-gel method
  • B1. Methylene blue
  • B1. SrTiO
  • B3. Photocatalyst

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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