Fine tuning of the face orientation of ZnO crystals to optimize their photocatalytic activity

Eue Soon Jang, Jung Hee Won, Seong Ju Hwang, Jin Ho Choy

Research output: Contribution to journalArticle

469 Citations (Scopus)

Abstract

The face-tunable synthesis of nano and microscale ZnO crystals with different ratios of polar to nonpolar faces is investigated. ZnO has a direct wide bandgap, that makes it very important for the photocatalytic generation of hydrogen peroxide, which can be utilized for the degeneration of organic pollutants and the sterilization of bacteria and viruses. As the photocatalytic reaction occurs at the interface between catalyst surfaces and organic pollutants, a strong dependency of photocatalytic activity on a specific crystal plane is demonstrated. The morphologies of the ZnO crystals were investigated with the help if field-emission scanning electron microscopy (FESEM). Soft-solution processes has been used to synthesized nanorods, nanoplates, and DB micropores of ZnO with different ratios of polar to nonpolar faces. The results shows that ZnO nanoplates with a high population of polar Zn (0001) faces show the highest photocatalytic activity for H2O2 generation.

Original languageEnglish
Pages (from-to)3309-3312
Number of pages4
JournalAdvanced Materials
Volume18
Issue number24
DOIs
Publication statusPublished - 2006 Dec 18

Fingerprint

Crystal orientation
Tuning
Organic pollutants
Crystals
Nanorods
Viruses
Hydrogen peroxide
Field emission
Hydrogen Peroxide
Bacteria
Energy gap
Scanning electron microscopy
Catalysts

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Jang, Eue Soon ; Won, Jung Hee ; Hwang, Seong Ju ; Choy, Jin Ho. / Fine tuning of the face orientation of ZnO crystals to optimize their photocatalytic activity. In: Advanced Materials. 2006 ; Vol. 18, No. 24. pp. 3309-3312.
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Fine tuning of the face orientation of ZnO crystals to optimize their photocatalytic activity. / Jang, Eue Soon; Won, Jung Hee; Hwang, Seong Ju; Choy, Jin Ho.

In: Advanced Materials, Vol. 18, No. 24, 18.12.2006, p. 3309-3312.

Research output: Contribution to journalArticle

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AB - The face-tunable synthesis of nano and microscale ZnO crystals with different ratios of polar to nonpolar faces is investigated. ZnO has a direct wide bandgap, that makes it very important for the photocatalytic generation of hydrogen peroxide, which can be utilized for the degeneration of organic pollutants and the sterilization of bacteria and viruses. As the photocatalytic reaction occurs at the interface between catalyst surfaces and organic pollutants, a strong dependency of photocatalytic activity on a specific crystal plane is demonstrated. The morphologies of the ZnO crystals were investigated with the help if field-emission scanning electron microscopy (FESEM). Soft-solution processes has been used to synthesized nanorods, nanoplates, and DB micropores of ZnO with different ratios of polar to nonpolar faces. The results shows that ZnO nanoplates with a high population of polar Zn (0001) faces show the highest photocatalytic activity for H2O2 generation.

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