NH 4 + directed assembly of zinc oxide micro-tubes from nanoflakes

Weiyi Yang, Qi Li, Shian Gao, Jian Ku Shang

Research output: Contribution to journalArticlepeer-review


A simple precipitation process followed with the heat treatment was developed to synthesize ZnO micro-tubes by self-assembly of nanoflakes composed of nanoparticles. The resulting ZnO micro-tubes demonstrated excellent photocatalytic performance in degrading methylene blue (MB) under UV illumination. It was found that NH 4 + ion played a critical role in directing the assembly of the nanoflakes to form the micro-tube structure. A critical reaction ratio existed at or above which the ZnO micro-tubes could be obtained. For the mixtures of solutions of (NH 4) 2CO 3 and zinc salt, the ratio (C (NH4)2 CO3/C Zn2+) was 2:1.

Original languageEnglish (US)
Article number491
Pages (from-to)1-10
Number of pages10
JournalNanoscale Research Letters
StatePublished - 2011
Externally publishedYes


  • NH directed growth
  • Nanoparticles
  • Self-assembly
  • Zno micro-tubes

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


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