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https://open.uns.ac.rs/handle/123456789/20677
Title: | Potential of TiO2 with Various Au Nanoparticles for Catalyzing Mesotrione Removal from Wastewaters under Sunlight | Authors: | Šojić Merkulov, Daniela Lazarević, Marina Đorđević, Aleksandar Náfrádi, Máté Alapi, Tünde Putnik, Predrag Rakočević, Zlatko Novaković, Mirjana Miljević, Bojan Bognár, Szabolcs Abramović, Biljana |
Issue Date: | 2020 | Publisher: | MDPI | Journal: | Nanomaterials | Abstract: | Nowadays, great focus is given to the contamination of surface and groundwater because of the extensive usage of pesticides in agriculture. The improvements of commercial catalyst TiO2 activity using different Au nanoparticles were investigated for mesotrione photocatalytic degradation under simulated sunlight. The selected system was 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) that was studied by transmission electron microscopy and ultraviolet-visible (UV-Vis) spectroscopy. It was found that TiO2 particles size was ~20 nm and ~50 nm, respectively. The Au nanoparticles were below 10 nm and were well distributed within the framework of TiO2. For 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L), band gap energy was 2.45 eV. In comparison to the pure TiO2, addition of Au nanoparticles generally enhanced photocatalytic removal of mesotrione. By examining the degree of mineralization, it was found that 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) system was the most efficient for the removal of the mesotrione and intermediates. The effect of tert-butanol, NaF and ethylenediaminetetraacetic acid disodium salt on the transformation rate suggested that the relative contribution of various reactive species changed in following order: h+ > ●OHads > ●OHbulk. Finally, several intermediates that were formed during the photocatalytic treatment of mesotrione were identified. | URI: | https://open.uns.ac.rs/handle/123456789/20677 | ISSN: | 2079-4991 | DOI: | (BISIS)116052 (BISIS)116052 https://doi.org/10.3390/nano10081591 (BISIS)116052 |
Appears in Collections: | PMF Publikacije/Publications TF Publikacije/Publications |
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