Hydrothermal synthesis of mesostructured ZnO micropyramids with enhanced photocatalytic performance

Manoj Pudukudy, Zahira Yaakob

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The present article reports the synthesis, characterization and photocatalytic performance of highly oriented three dimensional ZnO micropyramids obtained by the surfactant assisted precipitation- hydrothermal treatment. Pluronic P-123 triblock copolymer was the surfactant employed in the present synthesis. The synthesized ZnO material was characterized for its phase and morphological studies. X-ray diffraction patterns suggested the formation of pure hexagonal wurtzite phase with the mean crystalline size of 39 nm. Electron microscopic studies of the material revealed the hexagonal micropyramid like morphology with an approximate size of 1-3 μm and the ZnO was found to be single crystalline by the SAED analysis. The ZnO micropyramids provided a bimodal mesoporous texture with a low specific surface area (4.5 m 2/g). Optical properties investigated using the photoluminescence spectrum indicated that the ZnO has a broad UV and blue emission bands which were attributed due to the annihilation of excitons, and a broad visible green emission corresponds to the oxygen interstitial defects. Under the UV light illumination, several concentrations of methylene blue were degraded completely over the as-synthesized ZnO microcrystals for repeated cycles.

Original languageEnglish
Pages (from-to)47-57
Number of pages11
JournalSuperlattices and Microstructures
Volume63
DOIs
Publication statusPublished - 2013

Fingerprint

Hydrothermal synthesis
Surface-Active Agents
Surface active agents
surfactants
Crystalline materials
Poloxamer
Microcrystals
Methylene Blue
microcrystals
methylene blue
synthesis
Specific surface area
Excitons
Ultraviolet radiation
wurtzite
Diffraction patterns
Block copolymers
copolymers
Photoluminescence
interstitials

Keywords

  • Methylene blue
  • Photodegradation
  • Photoluminescence
  • ZnO micropyramids

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Hydrothermal synthesis of mesostructured ZnO micropyramids with enhanced photocatalytic performance. / Pudukudy, Manoj; Yaakob, Zahira.

In: Superlattices and Microstructures, Vol. 63, 2013, p. 47-57.

Research output: Contribution to journalArticle

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