Paper Title:
Inactivation of Escherichia Coli on Titanium Dioxide Photocatalysis Nanoparticles
  Abstract

The effects of P25 TiO2 made by DEGUSSA and one kind nano-titanium dioxide made by a certain company in China (Expressed by Tc) on Escherichia coli were tested by the minimal inhibitory concentration (MIC) method, and the status dispersed of two kinds nano-TiO2 and the micro-phenomenon of the effect on Escherichia coli were observed by scanning electron microscope (SEM). The hydroxyl radical (•OH) signal intensity in liquid produced by nano-TiO2 was tested by electron spinning resonance (ESR). It was found that the MIC of the P25 and Tc were 500 mg/L and 5 g/L, respectively. The cells of E. coli which were attached by the nano-TiO2 particles were damaged strongly, and the membrane was dissolved and dispersed under SEM. The intensity of •OH signal produced by P25 was stronger than that of Tc tested by ESR. The size of E. coli was 0.4~0.7×1~3 µm, and the average diameter of nano-TiO2 was 20 nm. When the nano-TiO2 particles touch the E. coli, it would stick to the surface of the cell wall and destroy the cell membrane, lead to the canker of cell membrane and the outflow of cytoplasm. The difference of the MIC between the two kinds of nano-powders may be due to their dispersion degree and the particle diameter which influence the •OH production.

  Info
Periodical
Edited by
Jinsheng Liang and Lijuan Wang
Pages
99-104
DOI
10.4028/www.scientific.net/AMR.96.99
Citation
J. Wang, Z. J. Ji, Z. H. Shui, X. Y. Wang, N. Ding, H. J. Li, "Inactivation of Escherichia Coli on Titanium Dioxide Photocatalysis Nanoparticles ", Advanced Materials Research, Vol. 96, pp. 99-104, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jing Quan Yang, Zheng Wang, Jin Hui Wu, Li Mei Hao, Tao Tian, Song Lin
Abstract:Use of an air filter material combined with antibacterial agents is one of the most effective methods to resolve the problem of air filter...
1519
Authors: Wen Han Yang, Tsung Yu Tsai, Chih Chao Wu, Tai Lee Hu, Chi Chuan Kan
Chapter 08: Nanomaterials
Abstract:In this study, the nano-silver impregnated media (NAg-ball) was proposed to inactive E. coli in water. After 24 h of contact with NAg-ball,...
732
Authors: Rui Xue, Bing Jie Chen, Xiao Jin, Qing Song Zhang, Mei Ling Han, Cong Cong Liang
Symposium J: Biomedical Materials
Abstract:Silk sericin composed of 18 amino acids has been widely used in the fields of cosmetic additives, food, medicine and functional biomaterials...
451
Authors: Viktorija Denisova, Linda Mezule, Tālis Juhna, Jurijs Ozolins
Chapter 3: Materials and Technologies in Environmental Engineering and Waste Recycling
Abstract:Electrochemical disinfection device EDI-001 equipped with titanium oxide (TiO2-x) ceramic electrodes was tested as a system for...
133