Editing Ozone (section)

====Types of ozone decomposition====
Ozone is a toxic substance,<ref>{{cite journal |last=Menzel |first=D. B. |title=Ozone: an overview of its toxicity in man and animals |date=1984 |journal=Journal of Toxicology and Environmental Health |volume=13 |issue=2–3 |pages=183–204 |issn=0098-4108 |bibcode=1984JTEH...13..181M |pmid=6376815 |doi=10.1080/15287398409530493}}</ref><ref name="EPA-2022">{{cite web |publisher=United States Environmental Protection Agency |title=Ozone Generators that are Sold as Air Cleaners |date=28 February 2022 |website=EPA |url=https://www.epa.gov/indoor-air-quality-iaq/ozone-generators-are-sold-air-cleaners#info-sources |access-date=28 February 2022 |url-status=live |archive-url=https://web.archive.org/web/20220209015459/https://www.epa.gov/indoor-air-quality-iaq/ozone-generators-are-sold-air-cleaners |archive-date=9 February 2022}}</ref> commonly found or generated in human environments (aircraft cabins, offices with photocopiers, laser printers, sterilizers, ...).

The [[catalysis|catalytic]] decomposition of ozone is very important to reduce pollution. This type of decomposition is the most widely used, especially with solid catalysts, and it has many advantages such as a higher conversion with a lower temperature. Furthermore, the product and the catalyst can be instantaneously separated, and this way the catalyst can be easily recovered without using any separation operation. The most-used materials in the catalytic decomposition of ozone in the gas phase are [[manganese dioxide]], transition metals such as Mn, Co, Cu, Fe, Ni, or Ag, and noble metals such as Pt, Rh, or Pd.

[[Radical (chemistry)|Free radicals]] of [[chlorine]] (Cl{{sup|'''·'''}}), formed by the action of ultraviolet radiation on chlorofluorocarbons (CFCs) and sea salt, are known to catalyze the breakdown of ozone in the atmosphere.

There are two other possibilities for decomposing ozone in the gas phase:
* Thermal decomposition, in which the ozone is decomposed using only the action of heat. The problem is that this type of decomposition is very slow with temperatures below 250&nbsp;°C. However, the decomposition rate can be increased working with higher temperatures but this would involve a high energy cost.
* Photochemical decomposition, which consists of radiating ozone with ultraviolet radiation (UV) and it gives rise to oxygen and radical peroxide.<ref>{{cite thesis |last=Roca Sánchez |first=Anna |title=Estudio cinético de la descomposición catalítica de ozono |date=2015-09-01 |url=https://riunet.upv.es/handle/10251/54140}}</ref>