Please use this identifier to cite or link to this item: http://essuir.sumdu.edu.ua/handle/123456789/9305
Or use following links to share this resource in social networks: Recommend this item
Title Enhancement of NMP degradation under UV light by nitrogen-doped TiO2 thin films using a design of experiment
Authors Fakhouri, H.
Smith, W.
Pulpytel, J.
Zolfaghari, A.
Mortaheb, H.
Meshkini, F.
Jafari, R.
Arefi-Khonsari, F.
ORCID
Keywords photocatalysis
nitrogen doping
sputtering
Type Article
Date of Issue 2011
URI http://essuir.sumdu.edu.ua/handle/123456789/9305
Publisher Sumy State University Publishing
License
Citation H. Fakhouri, W. Smith, J. Pulpytel, et al., J. Nano- Electron. Phys. 3 No1, 26 (2011)
Abstract Doping nitrogen within TiO2 is an effective way to enhance visible light photocatalysis due to a direct electron excitation from the N2p states within the band gap. However, nitrogen doping is not always efficient for UV photocatalytic activity. Here, different structures of N-doped TiO2 (TiOxNy) have been prepared by reactive RF (13.56 MHz) magnetron sputtering. The morphological, optical, structural, and photocatalytic properties of the films have been studied in order to investigate the competitive effect of the morphology and the chemical composition on the efficiency of the photocatalytic activity. The variation of surface wettability of the film over time in the dark and under visible and UV irradiation was also studied. The reduction in wettability by dark storage can be explained by the adsorption of hydrocarbon contamination on the thin film’s surface. Additionally, from water contact angle experiments, it was found that these films developed hydrophilic properties upon UV and visible illumination. The photoinduced change in the contact angle of water was due to the removal of hydrocarbon contamination on the surface and also the photo-oxidation of the water droplet. Samples prepared at high pressure gave the best photocatalytic activity, even though the deposition rate was lower at higher pressures (lower film thicknesses), due to the high specific surface area and the optimal presence of TiOxNy crystals in the lattice. However, at low pressure, the TiN crystals became more predominant, and acted as recombination centers for the photo-generated charge carriers. A design of experiments was used in order to optimize the deposition parameters to have the best photocatalytic activity. The high photocatalytic activity under UV light was found to be due to the introduction of discrete energy levels within the band gap, the increased sample wettability, and the higher specific surface area. However, the post annealing process did not effect the activity under UV irradiation. Using the response surface methodology, RSM, based on a design of experiment, DOE, we are able to achieve a good understanding of the complex processes involved in the deposition of the thin films and their effect on the photocatalytic activity. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/9305
Appears in Collections: Журнал нано- та електронної фізики (Journal of nano- and electronic physics)

Views

Brazil Brazil
4
Canada Canada
1287194063
China China
2060192938
Colombia Colombia
1
Czechia Czechia
1
Denmark Denmark
1
Ecuador Ecuador
1
France France
6
Gabon Gabon
1
Germany Germany
42861
Greece Greece
4890261
Hungary Hungary
39382
India India
2
Iran Iran
206009
Ireland Ireland
321798517
Israel Israel
2
Italy Italy
3
Japan Japan
1417638239
Lebanon Lebanon
1
Lithuania Lithuania
1
Macao SAR China Macao SAR China
2
Malaysia Malaysia
89816
Netherlands Netherlands
3
Pakistan Pakistan
1
Poland Poland
4
Romania Romania
1
Russia Russia
24
Singapore Singapore
17100916
Slovakia Slovakia
1
South Korea South Korea
2058636753
Spain Spain
1
Sweden Sweden
1
Switzerland Switzerland
1
Taiwan Taiwan
659853
Thailand Thailand
58533318
Turkey Turkey
3
Ukraine Ukraine
1879383143
United Arab Emirates United Arab Emirates
1
United Kingdom United Kingdom
2058636752
United States United States
-1894439750
Unknown Country Unknown Country
707
Venezuela Venezuela
3
Vietnam Vietnam
1

Downloads

China China
1672915407
France France
2
Germany Germany
1229888
Greece Greece
1
Hong Kong SAR China Hong Kong SAR China
1
India India
1
Iran Iran
1
Ireland Ireland
1
Japan Japan
1
Kuwait Kuwait
1
Lithuania Lithuania
1
Nigeria Nigeria
5
Russia Russia
3
Ukraine Ukraine
1879383144
United Kingdom United Kingdom
1
United States United States
1545276823
Unknown Country Unknown Country
280

Files

File Size Format Downloads
3_Enhancement.PDF 1,34 MB Adobe PDF 803838265

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.