Photocatalytic study of two-dimensional ZnO nanopellets in the decomposition of methylene blue

W. S. Chiu, P. S. Khiew, M. Cloke, D. Isa, T. K. Tan, Shahidan Radiman, Roslan Abd. Shukor, Muhammad Azmi Abdul Hamid, N. M. Huang, H. N. Lim, Chin Hua Chia

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

We report several significant photodecomposition rates of methylene blue (MB) obtained before and after the refluxing process of own-synthesized two-dimensional (2D) zinc oxide (ZnO) nanopellets. Each photodecomposition rate of MB was found highly dependent on the weight of photocatalyst. The existing photodecomposition rate has been successfully improved to a factor of 22.0 times through refluxing process in excessive pyridine where the surface capping ligand (oleic acid) is removed from the 2D ZnO nanopellets. On the other hand, the refluxed photocatalyst (0.04 g) in this study was found to exhibit excellent recyclability up to three cycles. Furthermore, X-ray powder diffraction spectrums for the refluxed photocatatalyst, respectively, before and after three cycles of photocatalytic reactions, has generated the same patterns showing that the photocatalyst is stable and feasible to be used as an efficient photocatalyst material. Hence, these 2D ZnO nanopellets would provide a new alternative route as a highly efficient photocatalyst for wastewater treatment.

Original languageEnglish
Pages (from-to)345-352
Number of pages8
JournalChemical Engineering Journal
Volume158
Issue number2
DOIs
Publication statusPublished - 1 Apr 2010

Fingerprint

Zinc Oxide
Methylene Blue
Photocatalysts
Zinc oxide
zinc
oxide
decomposition
Decomposition
capping
ligand
X-ray diffraction
Oleic acid
Oleic Acid
Wastewater treatment
Pyridine
acid
X ray powder diffraction
Ligands
rate

Keywords

  • Characterization
  • Methylene blue
  • Photocatalyst
  • Pseudo-first-order
  • Two-dimensional nanopellets
  • Zinc oxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

Photocatalytic study of two-dimensional ZnO nanopellets in the decomposition of methylene blue. / Chiu, W. S.; Khiew, P. S.; Cloke, M.; Isa, D.; Tan, T. K.; Radiman, Shahidan; Abd. Shukor, Roslan; Abdul Hamid, Muhammad Azmi; Huang, N. M.; Lim, H. N.; Chia, Chin Hua.

In: Chemical Engineering Journal, Vol. 158, No. 2, 01.04.2010, p. 345-352.

Research output: Contribution to journalArticle

Chiu, W. S. ; Khiew, P. S. ; Cloke, M. ; Isa, D. ; Tan, T. K. ; Radiman, Shahidan ; Abd. Shukor, Roslan ; Abdul Hamid, Muhammad Azmi ; Huang, N. M. ; Lim, H. N. ; Chia, Chin Hua. / Photocatalytic study of two-dimensional ZnO nanopellets in the decomposition of methylene blue. In: Chemical Engineering Journal. 2010 ; Vol. 158, No. 2. pp. 345-352.
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