The heat treatment in carbon powder is a safe and effective strategy to enhance the photocatalytic activity of titanium dioxide (TiO2) coatings. Firstly, Ti coatings were prepared by mechanical coating operation with Ti powder on alumina balls. Secondly, the target TiO2 coatings were prepared using the prepared Ti coatings by the multi-heat treatment (pretreatment in carbon powder, oxidation in air and reduction in carbon powder). During the pretreatment, thin films of Ti2CO and micro-cracks form in the surface of the Ti coatings. The formed thin films and micro-cracks are helpful for forming a nano-fiber morphology of rutile TiO2, during the subsequent oxidation. During the reduction, oxygen vacancies generated in the lattice of rutile TiO2 are in favor of narrowing the band gap. The target TiO2 coatings with a nano-fiber morphology and the narrowed band gap, effectively enhances the photocatalytic activity by more than 3 times, compared with the pristine TiO2 coatings.
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ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 21–23, 2015
Colorado Springs, Colorado, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5730-4
PROCEEDINGS PAPER
Enhanced Photocatalytic Activity of TiO2 Coatings by Heat Treatment in Carbon Powder Available to Purchase
Sujun Guan,
Sujun Guan
Chiba University, Chiba, Chiba, Japan
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Liang Hao,
Liang Hao
Tianjin University of Science and Technology, Tianjin, China
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Kohei Miyazawa,
Kohei Miyazawa
Chiba University, Chiba, Chiba, Japan
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Hiroyuki Yoshida,
Hiroyuki Yoshida
Chiba Industrial Technology Research Institute, Chiba, Chiba, Japan
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Hiroshi Asanuma
Hiroshi Asanuma
Chiba University, Chiba, Chiba, Japan
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Sujun Guan
Chiba University, Chiba, Chiba, Japan
Liang Hao
Tianjin University of Science and Technology, Tianjin, China
Kohei Miyazawa
Chiba University, Chiba, Chiba, Japan
Yun Lu
Chiba University, Chiba, Chiba, Japan
Hiroyuki Yoshida
Chiba Industrial Technology Research Institute, Chiba, Chiba, Japan
Hiroshi Asanuma
Chiba University, Chiba, Chiba, Japan
Paper No:
SMASIS2015-8988, V002T04A013; 5 pages
Published Online:
January 11, 2016
Citation
Guan, S, Hao, L, Miyazawa, K, Lu, Y, Yoshida, H, & Asanuma, H. "Enhanced Photocatalytic Activity of TiO2 Coatings by Heat Treatment in Carbon Powder." Proceedings of the ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Integrated System Design and Implementation; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting. Colorado Springs, Colorado, USA. September 21–23, 2015. V002T04A013. ASME. https://doi.org/10.1115/SMASIS2015-8988
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