Naslov
Methods of immobilization of titanium dioxide on rubber tiles made from recycled tyres for passive air protection by solar photocatalysis

Autori
Benjak, Paula ; Tomaš, Marija ; Brnardić, Ivan ; Grčić, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th International Conference on CATALYSIS AND CHEMICAL ENGINEERING / - , 2023, 15-15

Skup
7th International Conference on Catalysis and Chemical Engineering

Mjesto i datum
Las Vegas, Nevada, SAD, 20.02.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
titanium dioxide, solar photocatalysis, recycled rubber, air purification

Sažetak
The immobilization of titanium dioxide on the surface of recycled rubber tiles presents a solution for achieving passive air protection. A completely new purpose for tiles was obtained by addressing air pollution and related health issues. The primary purpose of recycled rubber tiles is to provide protection from injuries on children’s playgrounds, but they are also used for many other purposes. The main idea was to achieve the synergistic action between immobilized TiO2 on recycled rubber tiles and solar radiation (hereafter: photocatalytic rubber tiles, PRT). This would allow triggers redox reactions on the surface of photocatalysts which successfully remove volatile organic compounds, sulphur dioxide, ammonia, unpleasant odours, nitrogen oxides, and etc. [1]. According to, this paper presents the experimental results of commercially available TiO2 P25 immobilized on recycled rubber tiles and their possible impact on the environment. The initial method of immobilization is the modified sol-gel method. Several such immobilizations were made to compare and select the best ratio and find a way to make a process more environmentally friendly. Stability and environmental impact of PRT were investigated by leaching test and AAS and TOC analyses. Characterization of PRT in terms of crystal structure and morphology was investigated by SEM/EDS mapping and FTIR analysis. Photocatalytic tests were done in simulated polluted atmosphere to confirm the PRT activity as new photocatalytic material. Photocatalytic oxidation of NH3 was achieved by using rubber tiles immobilized with 2 g of TiO2, confirming the photocatalytic oxidation of NH3 to N2. Furthermore, a decrease of NH3 in the presence of irradiation during the referent experiment without TiO2 layer indicates a possible wet catalytic oxidation which is a result of presence of metalloid particles in the rubber tiles. Therefore, the TiO2 layer on rubber tiles contributes to the protection of the rubber tiles against typical wear due to atmospheric exposure, confirming the use of these new materials for passive air protection. Based on the given results, successful immobilization of titanium dioxide on the reference rubber substrate was achieved and the PRT proved to be the most effective in terms of photocatalytic air purification even at the lowest dosage of TiO2. [1] J. Fermoso, B. Sánchez, and S. Suarez, “Air purification applications using photocatalysis, ” Nanostructured Photocatal., no.2, pp. 99–128, 2020, doi: 10.1016/b978-0-12-817836-2.00005-3.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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