Ecotoxicity of photocatalytic TiO2-based surfaces prepared by different preparation methods and doped with Zr and Ce

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10250982" target="_blank" >RIV/61989100:27710/22:10250982 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27640/22:10250982

Result on the web

<a href="https://www.ceec-physchem.org/" target="_blank" >https://www.ceec-physchem.org/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Ecotoxicity of photocatalytic TiO2-based surfaces prepared by different preparation methods and doped with Zr and Ce

Original language description

This contribution was presented as a poster at the 1st Central and Eastern European Conference on Physical Chemistry and Material Science (CEEC-PSMP1) organized in the term 26-30 July 2022 in Split In Croatia.Ecotoxicological effects of four nanostructured TiO2, three cerium doped TiO2 and two zirconium doped TiO2 prepared by different chemical methods were evaluated, since all oxides are keenly investigated semiconductor photocatalysts for waste and drinking water and waste gas purification in last three decades. Acute biological toxicity of synthesized photocatalysts was evaluated using seed germination and aquatic plant growth as the endpoints in tests with Sinapis alba (ISO 11269-1) and Lemna minor (ISO 20079), and was compared to commercially available TiO2 Degussa P25.Toxicity tests exhibited good sensitivity for monitoring of the toxicity of investigated nanomaterials. Toxicity results of TiO2 documented that TiO2 prepared using titanylsulphate as a Ti precursor were toxic to both plant species contrary to TiO2 prepared using titanium (IV) isopropoxide. Cerium doped TiO2 was non-toxic and zirconium doped TiO2 even stimulated both plant species growth. TiO2 Degussa P25 showed stimulation effect to Lemna minor and no toxicity to Sinapis alba. The effect of crystallite-size was followed and it was revealed that only the small crystallite-size is not the toxicity-determining factor. Factors such as the rate of nano-sized crystallites aggregation and concentration, shape and surface properties of TiO2 nanoparticles affect TiO2 toxicity to both plant species. In case of TiO2 prepared using titanylsulphate, the release of SO42- ions stays the main cause of its toxicity.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů