ISO 19722:2017

INTERNATIONAL ISO
STANDARD 19722
First edition
2017-01
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Test method for determination
of photocatalytic activity on
semiconducting photocatalytic
materials by dissolved oxygen
consumption
Céramiques techniques — Méthode d’essai relative à la détermination
de l’activité photocatalytique sur matériaux photocatalytiques
semiconducteurs par la consommation d’oxygène dissous
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Principle . 2
6 Materials . 3
6.1 Reagent . 3
6.2 Purified water . 3
6.3 Purified air . 3
6.4 Purified water saturated with dissolved oxygen . 3
6.5 Test solution . 3
7 Test apparatus . 3
7.1 General . 3
7.2 Ultraviolet (UV) — Irradiation light source . 3
7.3 UV radiometer . 3
7.4 UV light intensity . 3
7.5 DO analyser . 3
7.6 Magnetic stirrer and magnetic stirring bar . 4
8 Arrangement of test method . 4
8.1 Measuring device setup . 4
8.2 Test vessel and implement . 4
9 Test material . 4
9.1 Powder test sample . 4
9.2 Film test piece . 4
10 Procedure of the measurement . 5
10.1 Test temperature . 5
10.2 Preparation of water . 5
10.3 Powder test sample . 5
10.3.1 Preparation of suspension from powder test sample . 5
10.3.2 Procedure of the measurement . 5
10.4 Film test piece . 5
10.4.1 Preparation of film test piece . 5
10.4.2 Procedure of the measurement . 6
10.5 Blank POD(%) . 6
11 Evaluation of results . 6
11.1 General . 6
11.2 Evaluation of POD . 6
12 Test report . 7
Annex A (informative) Example of suitable measuring device component .8
Annex B (informative) Example of suitable test vessel and implement .10
Annex C (informative) Example of test position of test vessel .12
Annex D (informative) Example of a data evaluation .13
Annex E (informative) Results of the interlaboratory test .16
Bibliography .17
Foreword
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This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2017 – All rights reserved

Introduction
International Standards covering test methods for determination of photocatalytic activity have been
published. A wide variety of photocatalytic functions, such as water and air purification, antibacterial
effect, and self-cleaning, require different evaluation methods. However, much easier methods to
evaluate a common semiconducting photocatalytic activity are strongly demanded, in particular in
research and development activities for testing of performance of semiconducting photocatalyst and
photocatalytic materials under development.
INTERNATIONAL STANDARD ISO 19722:2017(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Test method for determination of
photocatalytic activity on semiconducting photocatalytic
materials by dissolved oxygen consumption
1 Scope
This document specifies the test method for determination of concentration of dissolved oxygen
consumed due to photocatalytic oxidation of phenol in aqueous phase by semiconducting photocatalytic
substances. The method is applicable to powder test sample or film test piece of semiconducting
photocatalystic material targeting water contaminants. This test method is not applicable for
evaluating the materials conjugated with other base material, such as organic binder which can also be
decomposed by the photocatalytic activity.
This document is applicable to the test method for the activity of powder test sample or film test piece
of semiconducting photocatalystic material targeting water contaminants.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5814, Water quality — Determination of dissolved oxygen — Electrochemical probe method
ISO 10677, Fine ceramics (advanced ceramics, advanced technical ceramics) — Ultraviolet light source for
testing semiconducting photocatalytic materials
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
3 Terms and definitions
For the purposes of this document, the terms and defi
...