Photocatalytic treatment of 2,4,6-trinitotoluene in red water by multi-doped TiO2with enhanced visible light photocatalytic activity

Yihe Zhang, Keke Cheng, Fengzhu Lv, Hongwei Huang, Bin Fei, Ying He, Zhengfang Ye, Bo Shen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Fe-N-doped TiO2, Fe-S-doped TiO2and Fe-N-S-doped TiO2were prepared with Fe doping peroxotitanium complex (Fe-PTC) as precursor in aqueous solution by a low-temperature process. The structure and properties of catalysts were characterized by XRD, FT-IR, XPS, TEM and UV-Vis respectively. Fe-N-doped TiO2, Fe-S-doped TiO2and Fe-N-S-doped TiO2all belong to anatase phase. The UV-Vis spectra of doped TiO2exhibited a red shift to 535nm and stronger absorption than that of pure TiO2in visible region. The pure TiO2displays bullet-like morphology with widths of about 20nm and Fe-N-S-doped TiO2consisted of irregular particles with diameters about 5-10nm. The doped samples all exhibited higher photocatalytic activity in the degradation of 2,4,6-trinitotoluene (TNT) in red water compared to pure TiO2. Fe-N-S-doped TiO2presented the highest photocatalytic activity and degraded about 91.5% 2,4,6-trinitotoluene within 12h under visible light irradiation. Structural characterization and property analysis results revealed that the co-doping of Fe-N, Fe-S and Fe-N-S remarkably altered the crystal specific surface area, microstructure, as well as the photocatalytic activity.
Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume452
Issue number1
DOIs
Publication statusPublished - 20 Jun 2014

Keywords

  • Photocatalytic
  • Red water
  • Visible light

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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