Efficiency of Cu2O/BiVO4 particles prepared with a new soft procedure on the degradation of dyes under visible-light irradiation

Eduardo Aguilera-Ruiz, Ulises M. García-Pérez, María De La Garza-Galván, Patricia Zambrano-Robledo, Bárbara Bermúdez-Reyes, José Peral

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59 Citations (Scopus)

Abstract

© 2014 Elsevier B.V. All rights reserved. Cu 2 O/BiVO 4 composites with different concentrations of Cu 2 O were synthesized by a simple impregnation method at 200°C under N 2 atmosphere for 4 h. The as-synthesized samples were characterized by X-ray powder diffraction, scanning electron microscopy, UV-vis diffuse reflection absorption and vis photoluminescence. The morphology of the as-synthesized composites with different weight ratios of Cu 2 O is composed by quasi-spherical and dendrite-like particles. The photocatalytic performance of the Cu 2 O/BiVO 4 composites was evaluated by degradation of methyl orange solutions under visible-LED irradiation. The results obtained show that the photocatalytic behavior of the p-n heterojunction Cu 2 O/BiVO 4 composites was better than pure Cu 2 O and BiVO 4 . The variation of the reaction parameters, such as solution pH and presence of O 2 , improved the photocatalytic performance of Cu 2 O/BiVO 4 composite. Meanwhile, a possible mechanism for methyl orange photocatalytic degradation over Cu 2 O/BiVO 4 photocatalysts was proposed. The chemical stability and reusability of Cu 2 O/BiVO 4 powders were also investigated.
Original languageEnglish
Pages (from-to)361-367
JournalApplied Surface Science
Volume328
DOIs
Publication statusPublished - 15 Feb 2015

Keywords

  • Cu O/BiVO heterojunction 2 4
  • Methyl orange
  • Photocatalysis
  • Visible-LED

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