ISO 18473-4:2022

INTERNATIONAL ISO
STANDARD 18473-4
First edition
2022-02
Functional pigments and extenders for
special applications —
Part 4:
Nanoscale titanium dioxide for
photocatalytic application
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 2
4.1 Classification . 2
4.2 Designation . 2
5 Requirements and test methods . 3
5.1 Appearance . 3
5.2 Technical requirements . 3
6 Sampling . 4
7 Marking and labelling . 4
8 Test report . 4
Bibliography . 5
iii
Foreword
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iv
Introduction
Metal nanoparticles are promising materials as the heterogeneous catalyst in a variety of organic
transformations. Their catalytic properties are functions of their size and crystal lattice parameters,
and they show amazing levels of performance in terms of selectivity, activity and improved yield of
products. In particular, nanoscale titanium dioxide (TiO ) particles exhibited many special properties
because the band gap of the nanoparticles increased with the decrease in size. The use of TiO
nanoparticles has received considerable attention in green synthetic organic chemistry, decomposition
and removal of air and water contaminants, deodorization, and antibacterial, antifungal, self-cleaning
and antifogging actions.
v
INTERNATIONAL STANDARD ISO 18473-4:2022(E)
Functional pigments and extenders for special
applications —
Part 4:
Nanoscale titanium dioxide for photocatalytic application
1 Scope
This document specifies requirements and corresponding test methods for nanoscale titanium dioxide
(TiO ) in either powder or suspension form for photocatalytic application.
This document is applicable to modified nanoscale titanium dioxide for photocatalytic application.
NOTE Such modification can be surface treatment, coating, doping and combination thereof.
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 591-1:2000, Titanium dioxide pigments for paints — Part 1: Specifications and methods of test
ISO 787-2, General methods of test for pigments and extenders — Part 2: Determination of matter volatile
at 105 °C
ISO 787-9, General methods o
...