Photocatalytic properties of nanocrystalline TiO2 thin film with Ag additions

Chung-Chieh Chang; Chung Kwei Lin; Chih Chieh Chan; Chao Sheng Hsu; Chin Yi Chen

doi:10.1016/j.tsf.2005.08.152

Photocatalytic properties of nanocrystalline TiO₂ thin film with Ag additions

Chung-Chieh Chang, Chung Kwei Lin, Chih Chieh Chan, Chao Sheng Hsu, Chin Yi Chen

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

In the present study, nanocrystalline TiO₂/Ag composite thin films were prepared by a sol-gel spin coating technique. While, by introducing polystyrene (PS) microspheres, porous TiO₂/Ag films were obtained after calcining at a temperature of 500°C. The as-prepared TiO₂ and TiO₂/Ag thin films were characterized by X-ray diffractometry, and scanning electron microscopy to reveal the structural and morphological differences. In addition, the photocatalytic properties of these films were investigated by degrading methylene blue under UV irradiation. After 500°C calcination, the microstructure of PS-TiO₂ film without Ag addition exhibited a sponge-like microstructure while significant sintering effect was noticed with Ag additions and the films exhibited a porous microstructure. Meanwhile, coalescence of nanocrystalline anatase-phase TiO₂ can be observed with respect to the sharpening of XRD diffraction peaks. The photodegradation of porous TiO₂ doped with 1 mol% Ag exhibited the best photocatalytic efficiency where 72% methylene blue can be decomposed after UV exposure for 12 h.

Original language	English
Pages (from-to)	274-278
Number of pages	5
Journal	Thin Solid Films
Volume	494
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tsf.2005.08.152
Publication status	Published - Jan 3 2006
Externally published	Yes

Keywords

Composite thin films
Photocatalytic properties
Spin coating
TiO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.tsf.2005.08.152

Cite this

@article{66432482ce5a4a3992f549f397be9bb7,

title = "Photocatalytic properties of nanocrystalline TiO2 thin film with Ag additions",

abstract = "In the present study, nanocrystalline TiO2/Ag composite thin films were prepared by a sol-gel spin coating technique. While, by introducing polystyrene (PS) microspheres, porous TiO2/Ag films were obtained after calcining at a temperature of 500°C. The as-prepared TiO2 and TiO2/Ag thin films were characterized by X-ray diffractometry, and scanning electron microscopy to reveal the structural and morphological differences. In addition, the photocatalytic properties of these films were investigated by degrading methylene blue under UV irradiation. After 500°C calcination, the microstructure of PS-TiO2 film without Ag addition exhibited a sponge-like microstructure while significant sintering effect was noticed with Ag additions and the films exhibited a porous microstructure. Meanwhile, coalescence of nanocrystalline anatase-phase TiO2 can be observed with respect to the sharpening of XRD diffraction peaks. The photodegradation of porous TiO2 doped with 1 mol% Ag exhibited the best photocatalytic efficiency where 72% methylene blue can be decomposed after UV exposure for 12 h.",

keywords = "Composite thin films, Photocatalytic properties, Spin coating, TiO",

author = "Chung-Chieh Chang and Lin, {Chung Kwei} and Chan, {Chih Chieh} and Hsu, {Chao Sheng} and Chen, {Chin Yi}",

note = "Funding Information: This project was funded by Feng Chia University Distinguished Research Program, Grant number: FCU-92GB18.",

year = "2006",

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doi = "10.1016/j.tsf.2005.08.152",

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AU - Chang, Chung-Chieh

AU - Lin, Chung Kwei

AU - Chan, Chih Chieh

AU - Hsu, Chao Sheng

AU - Chen, Chin Yi

N1 - Funding Information: This project was funded by Feng Chia University Distinguished Research Program, Grant number: FCU-92GB18.

PY - 2006/1/3

Y1 - 2006/1/3

N2 - In the present study, nanocrystalline TiO2/Ag composite thin films were prepared by a sol-gel spin coating technique. While, by introducing polystyrene (PS) microspheres, porous TiO2/Ag films were obtained after calcining at a temperature of 500°C. The as-prepared TiO2 and TiO2/Ag thin films were characterized by X-ray diffractometry, and scanning electron microscopy to reveal the structural and morphological differences. In addition, the photocatalytic properties of these films were investigated by degrading methylene blue under UV irradiation. After 500°C calcination, the microstructure of PS-TiO2 film without Ag addition exhibited a sponge-like microstructure while significant sintering effect was noticed with Ag additions and the films exhibited a porous microstructure. Meanwhile, coalescence of nanocrystalline anatase-phase TiO2 can be observed with respect to the sharpening of XRD diffraction peaks. The photodegradation of porous TiO2 doped with 1 mol% Ag exhibited the best photocatalytic efficiency where 72% methylene blue can be decomposed after UV exposure for 12 h.

AB - In the present study, nanocrystalline TiO2/Ag composite thin films were prepared by a sol-gel spin coating technique. While, by introducing polystyrene (PS) microspheres, porous TiO2/Ag films were obtained after calcining at a temperature of 500°C. The as-prepared TiO2 and TiO2/Ag thin films were characterized by X-ray diffractometry, and scanning electron microscopy to reveal the structural and morphological differences. In addition, the photocatalytic properties of these films were investigated by degrading methylene blue under UV irradiation. After 500°C calcination, the microstructure of PS-TiO2 film without Ag addition exhibited a sponge-like microstructure while significant sintering effect was noticed with Ag additions and the films exhibited a porous microstructure. Meanwhile, coalescence of nanocrystalline anatase-phase TiO2 can be observed with respect to the sharpening of XRD diffraction peaks. The photodegradation of porous TiO2 doped with 1 mol% Ag exhibited the best photocatalytic efficiency where 72% methylene blue can be decomposed after UV exposure for 12 h.

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