SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (5): 1474-1482.DOI: 10.1016/j.cjche.2020.03.017

• Materials and Product Engineering • 上一篇    

Preparation, characterization and antibacterial properties of cobalt doped titania nanomaterials

Dai Shi1,2, He Yang1, Xiangxin Xue1   

  1. 1 Institute of Resources and Environment, School of Metallurgy, Northeastern University, Shenyang 110819, China;
    2 The Faculty of Mechanical Engineering, Shenyang Polytechnic College, Shenyang 110045, China
  • 收稿日期:2019-10-19 修回日期:2020-02-28 出版日期:2020-05-28 发布日期:2020-07-29
  • 通讯作者: Dai Shi
  • 基金资助:
    We gratefully acknowledge the support from the National Natural Science Foundation of China (No. 51474056).

Preparation, characterization and antibacterial properties of cobalt doped titania nanomaterials

Dai Shi1,2, He Yang1, Xiangxin Xue1   

  1. 1 Institute of Resources and Environment, School of Metallurgy, Northeastern University, Shenyang 110819, China;
    2 The Faculty of Mechanical Engineering, Shenyang Polytechnic College, Shenyang 110045, China
  • Received:2019-10-19 Revised:2020-02-28 Online:2020-05-28 Published:2020-07-29
  • Contact: Dai Shi
  • Supported by:
    We gratefully acknowledge the support from the National Natural Science Foundation of China (No. 51474056).

摘要: Cobalt-doped titania (Co-TiO2) nanomaterials were synthesized by the sol-gel method at different calcination temperatures. Using Escherichia coli (a), Staphylococcus aureus (b) and Candida albicans (c) as target strains, the antibacterial activity in visible light of the nanomaterials were studied. Co-TiO2 nanomaterials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectrum (FT-IR) and X-ray photoelectron spectroscopy (XPS). The Co ions in the Co-TiO2 nanomaterial exist in the form of CoTiO3 phase. The antibacterial properties of Co-TiO2 nanomaterials on E. coli (a), S. aureus (b) and C. albicans (c) were investigated with the oscillating flask method and the inhibition zone method. The nanomaterials calcined at 600℃ exhibit excellent antibacterial activity. The bacteriostatic rates for E. coli, S. aureus and C. albicans reached 99.5%, 91.3% and 93.4% respectively. The diameters of the antibacterial rings were up to 36 mm, 37 mm, 30 mm respectively, and the clarity of the ring was clear. The antibacterial properties of Co-TiO2 nanomaterials were compared with those of traditional silver sol, zinc oxide sol and Zn-doped TiO2 nanomaterials The mechanism of the influences of Co ions doping on the antibacterial activity of TiO2 nanomaterials was also discussed. The doping of Co ions inhibits the particle size of the antibacterial agent and extends the photocatalytic response range, thereby improving the photocatalytic performance of the antibacterial agent.

关键词: Antibacterial activity, Co-doped, Visible light, TiO2, CoTiO3

Abstract: Cobalt-doped titania (Co-TiO2) nanomaterials were synthesized by the sol-gel method at different calcination temperatures. Using Escherichia coli (a), Staphylococcus aureus (b) and Candida albicans (c) as target strains, the antibacterial activity in visible light of the nanomaterials were studied. Co-TiO2 nanomaterials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectrum (FT-IR) and X-ray photoelectron spectroscopy (XPS). The Co ions in the Co-TiO2 nanomaterial exist in the form of CoTiO3 phase. The antibacterial properties of Co-TiO2 nanomaterials on E. coli (a), S. aureus (b) and C. albicans (c) were investigated with the oscillating flask method and the inhibition zone method. The nanomaterials calcined at 600℃ exhibit excellent antibacterial activity. The bacteriostatic rates for E. coli, S. aureus and C. albicans reached 99.5%, 91.3% and 93.4% respectively. The diameters of the antibacterial rings were up to 36 mm, 37 mm, 30 mm respectively, and the clarity of the ring was clear. The antibacterial properties of Co-TiO2 nanomaterials were compared with those of traditional silver sol, zinc oxide sol and Zn-doped TiO2 nanomaterials The mechanism of the influences of Co ions doping on the antibacterial activity of TiO2 nanomaterials was also discussed. The doping of Co ions inhibits the particle size of the antibacterial agent and extends the photocatalytic response range, thereby improving the photocatalytic performance of the antibacterial agent.

Key words: Antibacterial activity, Co-doped, Visible light, TiO2, CoTiO3