Characterization of self-cleaning glasses using Langmuir-Blodgett technique to control thickness of stearic acid multilayers - Importance of spectral emission to define standard test

被引：29

作者：

Peruchon, L. ^{[1
]}

Puzenat, E. ^{[1
]}

Girard-Egrot, A. ^{[2
]}

Blum, L. ^{[2
]}

Herrmann, J. M. ^{[1
]}

Guillard, C. ^{[1
]}

机构：

[1] Univ Lyon, IRCELYON, UMR 5256, F-69622 Villeurbanne, France

[2] ICBMS, Lab Genie Enzymat & Biomol, F-69622 Villeurbanne, France

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2008年 / 197卷 / 2-3期

关键词：

stearic acid; photocatalytic degradation; irradiation wavelength; self-cleaning glass; Langmuir-Blodgett; fatty acid;

D O I：

10.1016/j.jphotochem.2007.12.033

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：

The photocatalytic properties of commercialized self-cleaning glasses have been evaluated by the degradation of stearic acid C(17)H(35)COOH (SA), selected as a model molecule representative of fatty dirt. The relative amount of SA has been determined by measuring the FTIR peak area in the range 2752 and 2992 cm(-1) corresponding to the C-H stretching bands. In order to estimate the thickness of one layer, the deposit of SA has been performed using the Langmuir-Blodgett (LB) method, which allows obtaining organized monomolecular layers of amphiphilic organics on a substrate. The thickness of one SA layer, obtained by Langmuir-Blodgett deposition, has been correlated to the FTIR signal. The photocatalytic degradation of a SA layer of a controlled thickness was carried out in a double jacket Pyrex reactor equipped with a UV Philips HPK 125 lamp. The photocatalytic degradation rate of the SA layer with different thicknesses was determined. The SA degradation rate was investigated under UV-A and UV-B irradiations to determine the influence of the photon wavelength range on efficiency. (c) 2008 Published by Elsevier B.V.

引用

页码：170 / 176

页数：7