Mechanism of photocatalytic bacterial inactivation on TiO2 films involving cell-wall damage and lysis

被引：55

作者：

Pulgarin, C. ^{[1
]}

Kiwi, J. ^{[1
]}

Nadtochenko, V. ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne, EPFL SB ISIC GGEC, CH-1015 Lausanne, Switzerland

[2] RAS, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Region, Russia

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2012年 / 128卷

关键词：

E. coli inactivation; TiO2; photocatalysis; Lysis; AFM; FTIR; Cell-wall; ESCHERICHIA-COLI; PHASE-TRANSITIONS; COMPOSITE FILMS; ATR-FTIR; MEMBRANE; SPECTROSCOPY; PEROXIDATION; DYNAMICS; BEHAVIOR; TITANIA;

D O I：

10.1016/j.apcatb.2012.01.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This article addresses the cell wall damage of Escherichia coli (from now on E. coli) by TiO2 suspensions. The dynamics of TiO2 photocatalysis by thin films layers is described. The films were characterized by FTIR spectroscopy and atomic force microscopy (AFM). The E coli complete inactivation is shown to be due to the partial damage of the cell-wall components (peroxidation). A small increase in the cell wall disorder concomitant with a decrease of the cell wall functional groups leads to higher cell wall fluidity as the precursor step preceding cell lysis. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：179 / 183

页数：5

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