UV and Visible Light Induced Photocatalytic Degradation on p–n Cu 2 O/ZnO Nanowires Decorated with Au–Pd Alloy Nanoparticles

Cheng Liang Hsu, Yen Cheng Chuo, Liang Wei Hsu, Yen Liang Pan, Yi Hung Liu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Chemical solutions are applied to synthesize Au–Pd alloy nanoparticles (NPs) and ZnO/Cu 2 O core–shell nanowires (NWs) on ITO/glass substrates by the photochemical, electrochemistry, and hydrothermal methods. The Cu 2 O cubic structures and ZnO hexagonal wurtzite structures are verified as being polycrystalline and single crystalline, respectively, by X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM). The p-Cu 2 O/n-ZnO NWs samples exhibit rectification properties that confirm the p–n heterojunction interface. The diameter range of the Au–Pd alloy NPs is around 2–15 nm and the Au/Pd ratio is 27:28, according to HR-TEM and X-ray photoelectron spectroscopy. The p-Cu 2 O/n-ZnO core–shell NWs feature higher UV photocatalytic degradation of methylene blue than do the ZnO NWs. Deposited Au, Pd, Au–Pd alloy NPs on the p-Cu 2 O/n-ZnO core–shell NWs improve the photocatalytic degradation efficiency under UV and blue light. The Au–Pd alloy NPs/p-Cu 2 O/n-ZnO core–shell NWs offer the best photocatalytic properties under UV- and blue-light-emitting diode (LED) illumination.

Original languageEnglish
Article number1801744
JournalAdvanced Materials Interfaces
Volume6
Issue number6
DOIs
StatePublished - 22 Mar 2019

Keywords

  • Au–Pd alloy nanoparticles
  • blue-light-emitting diode
  • Cu O/ZnO nanowires
  • photocatalytic degradation
  • UV-light-emitting diode

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