Investigation of Br-N Co-doped TiO2 photocatalysts: Preparation and photocatalytic activities under visible light

Yanfang Shen, Tianying Xiong, Hao Du, Huazi Jin, Jianku Shang, Ke Yang

Research output: Contribution to journalArticle

Abstract

Bromine (Br) and nitrogen (N) co-doped TiO2 ((Br-N-TiO 2) photocatalysts were prepared by a sol-gel method. The catalysts were characterized by X-ray Diffraction (XRD), N2 adsorption and desorption isotherms, X-ray Photoelectron Spectra (XPS), UV-Vis Diffraction Spectra and Electron Spin Response (ESR) Spectra. Experiments on photodegradation of Methylene Blue (MB) and Sulfosalicylic Acid (SSA) under visible light were carried out to evaluate the photocatalytic activities of the catalysts. Chemical Oxygen Demand (COD) analysis was also conducted to evaluate the mineralization degrees of the catalysts in MB photodegradation. Enhanced photocatalytic activities were observed for the Br-N-TiO2 catalysts in the experiments of MB and SSA photodegradation. A possible mechanism was proposed to explain the improved photocatalytic activities of the Br-N-TiO 2 catalysts.

Original languageEnglish (US)
Pages (from-to)41-48
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume52
Issue number1
DOIs
StatePublished - Oct 2009

Keywords

  • Br-N-co-doped
  • Photodergradation
  • Sol-gel
  • TiO photocatalysts
  • Visible light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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