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 journalArticlepeer-review

    27 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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