Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (10): 1919.

• Articles • Previous Articles     Next Articles

Preparation and Bactericidal Activity of C12A7-O- Nanoparticles

GONG Lu, SHEN Jing, LI Quan-Xin*   

  1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2010-04-01 Online:2010-10-10 Published:2010-10-10
  • Contact: LI Quan-Xin. E-mail: liqx@ustc.edu.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 2009AA05Z435)、国家“九七三” 计划项目(批准号: 2007CB210206)和国家自然科学基金(批准号: 50772107)资助.

Abstract: C12A7-O-{[Ca24Al28O64]4+·4(O-)} nanoparticles were prepared by sol-gel method. The synthesized C12A7-O- nonaparticles were investigated by X-ray diffraction, electron spin resonance and transmission electron microscopy. The antibacterial test of the C12A7-O- nonaparticles was also performed against E. coli(DH5α), S. aureus(ATCC 6538) and B. subtilis(ATCC 9372). The results show that the best condition for preparing C12A7-O- nanoparticles was sintering at 1150 ℃ for 6 h in oxygen ambience. The mean particle size of the C12A7-O- nanoparticles was 74 nm, and the cell parameter of the C12A7(Ca12Al14O33)cage with a O-concentration of 1.2×1020 cm-3 was (1.199±0.004) nm. The C12A7-O- nanoparticles also exhibited excellent broad-spectrum antibacterial activity. The unique features of present material such as thermal stability, environment-friendly property and safety, could be potentially utilized in antibacterial materials.

Key words: C12A7-O- nanoparticle, Sol-gel method, Bactericidal activity

TrendMD: