Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (1): 55-61.DOI: 10.12068/j.issn.1005-3026.2020.01.010

• Materials & Metallurgy • Previous Articles     Next Articles

Characterization and Antibacterial Properties of Li-Doped Nano-TiO2 Antibacterial Material

SHI Dai1,2, YANG He1, XUE Xiang-xin1, WANG Mei1   

  1. 1.School of Metallurgy, Northeastern University, Shenyang 110819, China;2. The Faculty of Mechanical Engineering, Shenyang Polytechnic College, Shenyang 110004, China.
  • Received:2019-05-21 Revised:2019-05-21 Online:2020-01-15 Published:2020-02-01
  • Contact: YANG He
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Abstract: Lithium doped titania (Li-TiO2) nano-materials were synthesized by a Sol-gel method. Using E.coli(ATCC 25922) as the target strain, the influences of factors such as doping lithium source, doping amount, surfactant, calcination temperature and other factors on the antibacterial properties of the materials were investigated, and the antibacterial mechanism of the antibacterial materials was discussed. Li-TiO2 nano-materials were characterized by X-ray diffraction(XRD), scanning electronic microscope(SEM)and UV-Vis diffuse reflectance spectra(DRS). The experimental results show that the optimal reaction conditions of Li-doped TiO2 nano-antibacterial materials can be achieved by adjusting the conditions of Li source, doping amount, surfactant type and calcination temperature. It is also found that the optimal antibacterial rate of Li doped TiO2 antibacterial material against E.coli is more than 99.5% and the diameter of its antibacterial ring reaches 2.6cm. The photocatalytic properties of the antibacterial agent are improved by inhibiting the grain growth of the antibacterial agent and expanding the light response range.

Key words: antibacterial property, titanium dioxide, Li-doped, lithium source, doping amount, surfactant, calcination temperature

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