Effects of nitrogen content in monocrystalline nano-CeO 2 on the degradation of dye in indoor lighting

Dongfeng Sun, Mingjie Gu, Ruixing Li, Shu Yin, Xiaozhen Song, Bin Zhao, Chengqiang Li, Junping Li, Zhihai Feng, Tsugio Sato

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Azo dyes are an abundant class of synthetic dyes, however their complex structure makes them difficult to biologically degrade. We sought to degrade acid orange 7 (AO7) using nitrogen-doped nano-CeO 2 , which is a promising alternative photocatalyst to nitrogen-doped TiO 2 . Nitrogen-doped monocrystalline CeO 2 nanoparticles with various nitrogen contents were synthesized solvothermally at 120 °C from Ce(NO 3 ) 3 ·6H 2 O, triethanolamine, and ethanol. The CeO 2 monocrystals were between 7 and 8 nm in diameter. Nitrogen was shown to be incorporated into CeO 2 lattice from the results of the lattice parameter calculations, X-ray photoelectron spectroscopy analysis and elemental analysis. The degradation of AO7 in water was investigated using a domestic 10 W compact fluorescent lamp. The degradation efficiency of AO7 by monocrystalline CeO 2 increased with increasing nitrogen content, reaching 97.6% for the sample with a N:Ce molar ratio of 0.3.

Original languageEnglish
Pages (from-to)693-697
Number of pages5
JournalApplied Surface Science
Volume280
DOIs
Publication statusPublished - 2013 Sep 1

Keywords

  • Ceria
  • Degradation
  • Doping
  • Nanoparticles
  • Solvothermal method

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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