Preparation of nitrogen doped K₂Nb₄O₁₁ with high photocatalytic activity for degradation of organic pollutants

Yongfu QIU, Lei WANG, Chi Fai LEUNG, Guijian LIU, Shihe YANG, Tai-Chu LAU

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17 Citations (Scopus)

Abstract

Nitrogen doped K₂Nb₄O₁₁ (K₂Nb₄O₁₁-N) has been prepared by solid state reaction between K₂Nb₄O₁₁ and urea at 400 °C. K₂Nb₄O₁₁-N has been characterized by XRD, SEM, XPS and UV/vis diffuse reflectance. The photodegradation of various organic pollutants in water by this material, including Orange G (OG), bisphenol A (BPA) and pentachlorophenol (PCP) have been studied at λ > 330 nm and >399 nm. The results show that the photocatalytic activity of K₂Nb₄O₁₁-N at >399 nm is higher than those of K₂Nb₄O₁₁ and Degussa TiO₂ P25, indicating the activating effect of nitrogen doping. A mechanism for the photodegradation of organic substrates by K₂Nb₄O₁₁-N is proposed. Copyright © 2011 Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)23-30
JournalApplied Catalysis A: General
Volume402
Issue number1-2
DOIs
Publication statusPublished - 31 Jul 2011

Citation

Qiu, Y., Wang, L., Leung, C.-F., Liu, G., Yang, S., & Lau, T.-C. (2011). Preparation of nitrogen doped K₂Nb₄O₁₁ with high photocatalytic activity for degradation of organic pollutants. Applied Catalysis A: General, 402(1-2), 23-30. doi: 10.1016/j.apcata.2011.04.015

Keywords

  • Photodegradation
  • Niobate
  • Nitrogen-doped
  • Organic pollutants

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