Abstract
Hydrothermally grown ZnO nanorods have inherent crystalline defects primarily due to oxygen vacancies that enhance optical absorption in the visible spectrum, opening up possibilities for visible light photocatalysis. Comparison of photocatalytic activity of ZnO nanorods and nanoparticle films on a test contaminant methylene blue with visible light irradiation at 72 kilolux (klx) showed that ZnO nanorods are 12-24% more active than ZnO nanoparticulate films. This can be directly attributed to the increased effective surface area for adsorption of target contaminant molecules. Defects, in the form of interstitials and vacancies, were intentionally created by faster growth of the nanorods by microwave activation. Visible light photocatalytic activity was observed to improve by ≈8% attributed to the availability of more electron deficient sites on the nanorod surfaces. Engineered defect creation in nanostructured photocatalysts could be an attractive solution for visible light photocatalysis.
| Original language | English |
|---|---|
| Pages (from-to) | 14-20 |
| Number of pages | 7 |
| Journal | Beilstein Journal of Nanotechnology |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2010 |
Fingerprint
Keywords
- Defects
- Nanoparticle
- Nanorod
- Photocatalysis
- Pollutant
- ZnO
ASJC Scopus subject areas
- Materials Science(all)
- Electrical and Electronic Engineering
- Physics and Astronomy(all)
Cite this
Enhanced visible light photocatalysis through fast crystallization of zinc oxide nanorods. / Baruah, Sunandan; Mahmood, Mohammad Abbas; Myint, Myo Tay Zar; Bora, Tanujjal; Dutta, Joydeep.
In: Beilstein Journal of Nanotechnology, Vol. 1, No. 1, 2010, p. 14-20.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhanced visible light photocatalysis through fast crystallization of zinc oxide nanorods
AU - Baruah, Sunandan
AU - Mahmood, Mohammad Abbas
AU - Myint, Myo Tay Zar
AU - Bora, Tanujjal
AU - Dutta, Joydeep
PY - 2010
Y1 - 2010
N2 - Hydrothermally grown ZnO nanorods have inherent crystalline defects primarily due to oxygen vacancies that enhance optical absorption in the visible spectrum, opening up possibilities for visible light photocatalysis. Comparison of photocatalytic activity of ZnO nanorods and nanoparticle films on a test contaminant methylene blue with visible light irradiation at 72 kilolux (klx) showed that ZnO nanorods are 12-24% more active than ZnO nanoparticulate films. This can be directly attributed to the increased effective surface area for adsorption of target contaminant molecules. Defects, in the form of interstitials and vacancies, were intentionally created by faster growth of the nanorods by microwave activation. Visible light photocatalytic activity was observed to improve by ≈8% attributed to the availability of more electron deficient sites on the nanorod surfaces. Engineered defect creation in nanostructured photocatalysts could be an attractive solution for visible light photocatalysis.
AB - Hydrothermally grown ZnO nanorods have inherent crystalline defects primarily due to oxygen vacancies that enhance optical absorption in the visible spectrum, opening up possibilities for visible light photocatalysis. Comparison of photocatalytic activity of ZnO nanorods and nanoparticle films on a test contaminant methylene blue with visible light irradiation at 72 kilolux (klx) showed that ZnO nanorods are 12-24% more active than ZnO nanoparticulate films. This can be directly attributed to the increased effective surface area for adsorption of target contaminant molecules. Defects, in the form of interstitials and vacancies, were intentionally created by faster growth of the nanorods by microwave activation. Visible light photocatalytic activity was observed to improve by ≈8% attributed to the availability of more electron deficient sites on the nanorod surfaces. Engineered defect creation in nanostructured photocatalysts could be an attractive solution for visible light photocatalysis.
KW - Defects
KW - Nanoparticle
KW - Nanorod
KW - Photocatalysis
KW - Pollutant
KW - ZnO
UR - http://www.scopus.com/inward/record.url?scp=84861937401&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861937401&partnerID=8YFLogxK
U2 - 10.3762/bjnano.1.3
DO - 10.3762/bjnano.1.3
M3 - Article
C2 - 21977391
AN - SCOPUS:84861937401
VL - 1
SP - 14
EP - 20
JO - Beilstein Journal of Nanotechnology
JF - Beilstein Journal of Nanotechnology
SN - 2190-4286
IS - 1
ER -