Structure and photocatalytic influence of N-doping ATO nano-tubes on antibacterial activity toward Escherichia coli

Authors

Shing-Hoa Wang, Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, TaiwanFollow
Shiu-Mei Liu, Institute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan
Kan-Hung Hu, Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan
Chien-Chon Chen, Department of Energy Engineering, National United University, Miaoli, Taiwan
Tai-Yuan Lin, Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, Taiwan
Shuei-Wan Juang, Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan
Chia-Yuen Yen, Institute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan
Shu-Ting Lu, Institute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan
Chia-Heng Liu, Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan

Abstract

The photocatalytic antibacterial properties of anodic titanium oxide (ATO) nanotubes in the anatase structure derived from annealing at 450°C or 550°C or N-doping treatment were tested on Escherichia coli under UV-A, visible light illumi-nation, and dark conditions. Under UV-A illumination and dark conditions, in most cases, E. coli cultures containing ATO nanotubes of different treatments showed either no or slight differences in their growth from the cultures without ATO nanotubes. However, under visible light illumination, the growth of E. coli was inhibited in cultures containing ATO nanotubes. Among the three forms of ATO nanotubes, N-doped ATO nanotubes had the strongest antibacterial activ-ity. While the antibacterial activities of both the annealed and the N-doped ATO nanotubes increased positively correlated to the increase in their total surface area.

Recommended Citation

Wang, Shing-Hoa; Liu, Shiu-Mei; Hu, Kan-Hung; Chen, Chien-Chon; Lin, Tai-Yuan; Juang, Shuei-Wan; Yen, Chia-Yuen; Lu, Shu-Ting; and Liu, Chia-Heng (2021) "Structure and photocatalytic influence of N-doping ATO nano-tubes on antibacterial activity toward Escherichia coli," Journal of Marine Science and Technology: Vol. 29: Iss. 4, Article 14.
DOI: 10.51400/2709-6998.1595
Available at: https://jmstt.ntou.edu.tw/journal/vol29/iss4/14