Abstract
A simple and rapid room-temperature aerosol deposition method was used to fabricate TiO2 films for photokilling/photdegradation applications. TiO2 particles were accelerated to supersonic speeds and fractured upon impacting a glass substrate to form a functional thin film, a process known as aerosol deposition. After deposition, the films were annealed at various temperatures, and their photokilling/photodegradation performances following ultraviolet (UV) exposure were evaluated by counting the number of surviving bacterial colonies, and by a methylene blue decolorization test. The photocatalytic performances of all TiO2 films were obtained under weak UV exposure (0.6 mW/cm2). The film density, crystalline phase, and surface roughness (morphology) were measured by scanning electron microscopy, X-ray diffraction, UV-visible spectroscopy, and atomic force microscopy. The unique, self-assembled honeycomb structure of the aerosol deposited films contributed to the increase in surface area because of extreme roughness, which enhances the photokilling and photodegradation performance. Nonannealed films yielded the best photocatalytic performance due to their small crystalline sizes and large surface areas due to increased surface roughness.
| Original language | English |
|---|---|
| Pages (from-to) | 12510-12518 |
| Number of pages | 9 |
| Journal | Environmental Science and Technology |
| Volume | 46 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2012 Nov 20 |
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ASJC Scopus subject areas
- Chemistry(all)
- Environmental Chemistry
Cite this
Antibacterial and water purification activities of self-assembled honeycomb structure of aerosol deposited Titania film. / Park, Jung Jae; Lee, Jong Gun; Kim, Do Yeon; Hong, Joo Hyun; Kim, Jae-Jin; Hong, Seungkwan; Yoon, Suk Goo.
In: Environmental Science and Technology, Vol. 46, No. 22, 20.11.2012, p. 12510-12518.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Antibacterial and water purification activities of self-assembled honeycomb structure of aerosol deposited Titania film
AU - Park, Jung Jae
AU - Lee, Jong Gun
AU - Kim, Do Yeon
AU - Hong, Joo Hyun
AU - Kim, Jae-Jin
AU - Hong, Seungkwan
AU - Yoon, Suk Goo
PY - 2012/11/20
Y1 - 2012/11/20
N2 - A simple and rapid room-temperature aerosol deposition method was used to fabricate TiO2 films for photokilling/photdegradation applications. TiO2 particles were accelerated to supersonic speeds and fractured upon impacting a glass substrate to form a functional thin film, a process known as aerosol deposition. After deposition, the films were annealed at various temperatures, and their photokilling/photodegradation performances following ultraviolet (UV) exposure were evaluated by counting the number of surviving bacterial colonies, and by a methylene blue decolorization test. The photocatalytic performances of all TiO2 films were obtained under weak UV exposure (0.6 mW/cm2). The film density, crystalline phase, and surface roughness (morphology) were measured by scanning electron microscopy, X-ray diffraction, UV-visible spectroscopy, and atomic force microscopy. The unique, self-assembled honeycomb structure of the aerosol deposited films contributed to the increase in surface area because of extreme roughness, which enhances the photokilling and photodegradation performance. Nonannealed films yielded the best photocatalytic performance due to their small crystalline sizes and large surface areas due to increased surface roughness.
AB - A simple and rapid room-temperature aerosol deposition method was used to fabricate TiO2 films for photokilling/photdegradation applications. TiO2 particles were accelerated to supersonic speeds and fractured upon impacting a glass substrate to form a functional thin film, a process known as aerosol deposition. After deposition, the films were annealed at various temperatures, and their photokilling/photodegradation performances following ultraviolet (UV) exposure were evaluated by counting the number of surviving bacterial colonies, and by a methylene blue decolorization test. The photocatalytic performances of all TiO2 films were obtained under weak UV exposure (0.6 mW/cm2). The film density, crystalline phase, and surface roughness (morphology) were measured by scanning electron microscopy, X-ray diffraction, UV-visible spectroscopy, and atomic force microscopy. The unique, self-assembled honeycomb structure of the aerosol deposited films contributed to the increase in surface area because of extreme roughness, which enhances the photokilling and photodegradation performance. Nonannealed films yielded the best photocatalytic performance due to their small crystalline sizes and large surface areas due to increased surface roughness.
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U2 - 10.1021/es3037252
DO - 10.1021/es3037252
M3 - Article
C2 - 23110548
AN - SCOPUS:84869428700
VL - 46
SP - 12510
EP - 12518
JO - Environmental Science and Technology
JF - Environmental Science and Technology
SN - 0013-936X
IS - 22
ER -