Synthesis and characterization of ZnO and Fe 3O 4 nanocrystals from oleat-based organometallic compounds

Poisim Khiew, Weesiong Chiu, Thian Khoon Tan, Shahidan Radiman, Roslan Abd. Shukor, Muhammad Azmi Abdul Hamid, Chin Hua Chia

Research output: Contribution to journalArticle

Abstract

Magnetic and semiconductor nanomaterials exhibit novel magnetic and optical properties owing to their unique size and shape-dependent effects. With shrinking the size down to nanoscale region, various anomalous properties that normally not present in bulk start to dominate. Ability in harnessing of these anomalous properties for the design of various advance electronic devices is strictly dependent on synthetic strategies. Hence, current research has focused on developing a rational synthetic control to produce high quality nanocrystals by using organometallic approach to tune both size and shape of the nanomaterials. In order to elucidate the growth mechanism, transmission electron microscopy was employed as a powerful tool in performing real time-resolved morphologies and structural characterization of magnetic (Fe 3O 4) and semiconductor (ZnO) nanocrystals. The current synthetic approach is found able to produce nanostructures with well-defined shapes. We have found that oleic acid is an effective capping ligand in preparing oxide-based nanostructures without any agglomerations, even at high temperature. The oleate-based precursors and capping ligands are fatty acid compounds, which are respectively originated from natural palm oil with low toxicity. In comparison with other synthetic approaches in producing nanostructures, current synthetic method offers an effective route to produce oxide-based nanomaterials with well-defined shapes and good monodispersity. The nanocystals are well-separated with each other without any stacking effect. In addition, the as-synthesized nanopellets are stable in terms of chemically and physically if compared to those nanomaterials that are previous reported. Further development and extension of current synthetic strategy are being pursued to combine both of these materials into nanocomposite form that will be used as "smart magnetic nanophotocatalyst" for industry waste water treatment.

Original languageEnglish
Pages (from-to)667-673
Number of pages7
JournalWorld Academy of Science, Engineering and Technology
Volume79
Publication statusPublished - Jul 2011

Fingerprint

Organometallics
Nanostructured materials
Nanocrystals
Nanostructures
Ligands
Semiconductor materials
Oxides
Palm oil
Oleic acid
Water treatment
Fatty acids
Toxicity
Magnetic properties
Nanocomposites
Wastewater
Agglomeration
Optical properties
Transmission electron microscopy
Industry
Temperature

Keywords

  • Metal oxide nanomaterials
  • Morphology Control
  • Nanophotocatalyst
  • Organometallic synthesis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Synthesis and characterization of ZnO and Fe 3O 4 nanocrystals from oleat-based organometallic compounds. / Khiew, Poisim; Chiu, Weesiong; Tan, Thian Khoon; Radiman, Shahidan; Abd. Shukor, Roslan; Abdul Hamid, Muhammad Azmi; Chia, Chin Hua.

In: World Academy of Science, Engineering and Technology, Vol. 79, 07.2011, p. 667-673.

Research output: Contribution to journalArticle

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