Effects of annealing temperature on Cu-doped ZnO nanosheets

Yuliang Liu, Junpeng Wang, Chunhua Xu, Zishu Si, Shensheng Xu, San-Qiang Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The synthesis of Cu-doped ZnO nanosheets at room temperature was reported in our previous paper. The effects of annealing temperature on Cu-doped ZnO nanosheets were studied in this paper. Cu-doped ZnO nanosheets were annealed at 200-500 °C in air. The annealed specimens were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that Cu concentration in Cu-doped ZnO nanosheets reduced with increasing annealing temperature. When annealing temperature was lower than Zn melting point (410 °C), the morphologies of the Cu-doped ZnO nanosheets remained nearly the same as that before annealing. However, when the annealing temperature was over Zn melting point, Cu-doped ZnO nanosheets changed to nanowires, wormlike nanosheets or did not change. The change of Cu concentration in Cu-doped ZnO nanosheets is explained by oxidation thermodynamics. A physical model is suggested to explain the morphology changes of Cu-doped ZnO nanosheets, based on the existence of Cu-rich layer beneath Cu-doped ZnO nanosheets.
Original languageEnglish
Pages (from-to)860-866
Number of pages7
JournalJournal of Materials Science and Technology
Volume30
Issue number9
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Annealing
  • Cu-doped ZnO
  • Nanosheets
  • Nanowire

ASJC Scopus subject areas

  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry
  • Mechanics of Materials
  • Mechanical Engineering

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