Issue 2, 2020

The impact of photocatalytic paint porosity on indoor NOx and HONO levels

Abstract

Photocatalytic materials are a potentially effective remediation technology for indoor air purification. In this paper, we assess the impact of photocatalytic paint porosity on the indoor levels of nitrogen oxides (NOx) and nitrous acid (HONO). We observed that the porosity of photocatalytic paints plays a paramount role in the NO2 removal. The increase of pigment volume concentration (PVC), i.e. porosity, from PVC 53% to PVC 80% leads to an increase of the geometric NO2 uptake coefficient from (3.3 ± 0.5) × 10−6 to (3.2 ± 0.1) × 10−4. At the same time, a high quantity of HONO formed by NO2 conversion on the photocatalytic paint is emitted into the air. The formation of HONO, which is considered as a harmful compound and a major player in the oxidative capacity of indoor air, is reduced as the paint porosity increases. Based on these results, further optimization should be considered for future commercialization of photocatalytic paints aimed for indoor applications.

Graphical abstract: The impact of photocatalytic paint porosity on indoor NOx and HONO levels

Article information

Article type
Paper
Submitted
07 окт 2019
Accepted
04 дек 2019
First published
04 дек 2019

Phys. Chem. Chem. Phys., 2020,22, 589-598

The impact of photocatalytic paint porosity on indoor NOx and HONO levels

A. Gandolfo, V. Bartolomei, D. Truffier-Boutry, B. Temime-Roussel, G. Brochard, V. Bergé, H. Wortham and S. Gligorovski, Phys. Chem. Chem. Phys., 2020, 22, 589 DOI: 10.1039/C9CP05477D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements