Photodegradation of methylene blue over novel 3D ZnO microflowers with hexagonal pyramid-like petals

Manoj Pudukudy, Zahira Yaakob, Ramesh Rajendran, Thushara Kandaramath

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Three dimensional ZnO microflowers with a huge number of hexagonal pyramid-like petals have been effectively synthesized via the thermal decomposition of previously melted nitrate precursor for the first time. The synthesis was done without the aid of any structure directing agents or templates. Powder X-ray diffraction patterns showed the hexagonal wurtzite crystalline structure of ZnO with high phase purity. The dimension of the large microflower noted was found to be around 100 μm with the simultaneous existence of small flowers, with size varying from 20 μm onwards as realized from the scanning electron microscopic images. Transmission electron microscopy and selected area electron diffraction patterns confirmed the oriented growth of the single crystalline basic hexagonal pyramidal units of the microflower for its oriented aggregation. A possible growth/formation mechanism was interpreted. The photocatalytic degradation of methylene blue was investigated over ZnO microflowers. ZnO microflowers showed its excellent photocatalytic activity in the degradation of several industrial dye pollutants over a low catalyst dosage under UV-light irradiation. The microflowers were found to be highly reusable for repeated degradation of methylene blue dye pollutant.

Original languageEnglish
Pages (from-to)527-542
Number of pages16
JournalReaction Kinetics, Mechanisms and Catalysis
Volume112
Issue number2
DOIs
Publication statusPublished - 2014

Fingerprint

petals
Methylene Blue
Photodegradation
methylene blue
pyramids
degradation
Degradation
Diffraction patterns
contaminants
Coloring Agents
diffraction patterns
Dyes
dyes
Crystalline materials
Electron diffraction
Ultraviolet radiation
wurtzite
Nitrates
thermal decomposition
nitrates

Keywords

  • Methylene blue
  • Photodegradation
  • Pyramidal petals
  • Thermal decomposition
  • ZnO microflowers

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Photodegradation of methylene blue over novel 3D ZnO microflowers with hexagonal pyramid-like petals. / Pudukudy, Manoj; Yaakob, Zahira; Rajendran, Ramesh; Kandaramath, Thushara.

In: Reaction Kinetics, Mechanisms and Catalysis, Vol. 112, No. 2, 2014, p. 527-542.

Research output: Contribution to journalArticle

Pudukudy, Manoj ; Yaakob, Zahira ; Rajendran, Ramesh ; Kandaramath, Thushara. / Photodegradation of methylene blue over novel 3D ZnO microflowers with hexagonal pyramid-like petals. In: Reaction Kinetics, Mechanisms and Catalysis. 2014 ; Vol. 112, No. 2. pp. 527-542.
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