Abstract
ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.
| Original language | English |
|---|---|
| Pages (from-to) | 22760-22767 |
| Number of pages | 8 |
| Journal | Journal of Physical Chemistry C |
| Volume | 118 |
| Issue number | 39 |
| DOIs | |
| Publication status | Published - Jan 1 2014 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
Cite this
Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods. / Liu, Fangzhou; Leung, Yu Hang; Djurišić, Aleksandra B.; Ng, Alan Man Ching; Chan, Wai Kin; Ng, Ka Long; Wong, Kam Sing; Liao, Changzhong; Shih, Kaimin; Surya, Charles.
In: Journal of Physical Chemistry C, Vol. 118, No. 39, 01.01.2014, p. 22760-22767.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of plasma treatment on native defects and photocatalytic activities of zinc oxide tetrapods
AU - Liu, Fangzhou
AU - Leung, Yu Hang
AU - Djurišić, Aleksandra B.
AU - Ng, Alan Man Ching
AU - Chan, Wai Kin
AU - Ng, Ka Long
AU - Wong, Kam Sing
AU - Liao, Changzhong
AU - Shih, Kaimin
AU - Surya, Charles
PY - 2014/1/1
Y1 - 2014/1/1
N2 - ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.
AB - ZnO tetrapods, as a ZnO nanostructure with a low defect concentration, were subjected to plasma treatments using different gases to induce different types of defects in the samples and examine their effects on sample properties. Hydrogen and argon plasmas resulted in significant oxygen deficiencies, but no defect emission appeared. Oxygen plasma had only a minor effect on the sample composition, but it resulted in the appearance of defect emission and a significant overall reduction in luminescence intensity. On the other hand, the photocatalytic activity was significantly reduced in samples exhibiting oxygen deficiencies. It can thus be concluded that oxygen vacancies do not participate in the green emission of ZnO and also that their presence at the sample surface does not enhance the photocatalytic activity.
UR - http://www.scopus.com/inward/record.url?scp=84907781868&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907781868&partnerID=8YFLogxK
U2 - 10.1021/jp506468r
DO - 10.1021/jp506468r
M3 - Article
VL - 118
SP - 22760
EP - 22767
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 39
ER -