Photoinactivation of Escherichia coli on acrylic paint formulations using fluorescent light

被引：35

作者：

Caballero, L. ^{[1
]}

Whitehead, K. A. ^{[1
]}

Allen, N. S. ^{[1
]}

Verran, J. ^{[1
]}

机构：

[1] Manchester Metropolitan Univ, Dept Biol Chem & Hlth Sci, Dalton Res Inst, Manchester M1 5GD, Lancs, England

来源：

DYES AND PIGMENTS | 2010年 / 86卷 / 01期

关键词：

Photocatalysis; Paint; TiO2; UV inactivation; E; coli; Fluorescent light; INFRARED SPECTROSCOPIC EVALUATION; PIGMENTARY TITANIA PARTICLES; METALLOCENE POLYETHYLENE; TIO2; DIOXIDE; FILMS; DEGRADATION; INTENSITY; SURFACES; PHOTODEGRADATION;

D O I：

10.1016/j.dyepig.2009.12.001

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The composition of acrylic paints containing TiO2 photocatalyst was evaluated in terms of bacterial inactivation using Escherichia coli (ATCC8739), during irradiation with fluorescent light. Paint formulations containing photocatalyst and photocatalyst plus extenders were prepared as films. Complete bacterial inactivation was obtained within 96 h for simple paint formulations containing photocatalyst at different loadings (15-80% of total pigment volume concentration). The addition of extenders Such as silica and talc to the paint formulation did not affect the efficacy of bacterial inactivation. However, the use of CaCO3 as extender reduced the photocatalytic activity of the paint. This is attributed to reduced contact between the microorganism and the nanoparticles when CaCO3 is present, especially at concentrations higher than 40%. Results show the importance of careful paint formulation to enable activation of photocatalyst for E. coli killing under fluorescent light. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：56 / 62

页数：7