Development of a fluorescence-based method for evaluation of self-cleaning properties of photocatalytic layers

被引：47

作者：

Cernigoj, Urh ^{[1
]}

Kete, Marko ^{[1
]}

Stangar, Urska Lavrencic ^{[1
]}

机构：

[1] Univ Nova Gorica, Environm Res Lab, SI-5001 Nova Gorica, Slovenia

来源：

CATALYSIS TODAY | 2010年 / 151卷 / 1-2期

关键词：

Terephthalic acid; TiO2 thin film; Photocatalysis; Fluorescence; Standardization; RADICAL FORMATION; PILKINGTON ACTIV(TM); TIO2; ACID; DEGRADATION; REACTIVITY; OXIDATION; FILMS;

D O I：

10.1016/j.cattod.2010.03.043

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A new method for determination of self-cleaning activity of photocatalytic surfaces is proposed. It is based on the deposition of a transparent solid layer comprising terephthalic acid over the photocatalytic surface (three types of titania films on glass were used as test samples). When such a system was irradiated, among the other degradation products also a hydroxyterephthalic acid was formed due to a reaction between photoexcited TiO2 and terephthalic acid. Hydroxyterephthalic acid is a highly fluorescent molecule and it was detected by HPLC-FLD or spectrofluorimeter. This direct method of following quantitatively the formation of an oxidation product was found to be accurate, highly sensitive and reproducible, therefore, it represents a promising option to be considered in standardization efforts in the field of photocatalysis. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：46 / 52

页数：7

共 26 条

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