@conference{
author = "Jovanović, Aleksandar and Stevanović, Marija and Bugarčić, Mladen and Sokić, Miroslav and Tomašević, Anđelka and Marinković, Aleksandar",
year = "2022",
abstract = "Environmental pollution by wastewater
represents one of the greatest challenges nowadays.
The solution for this issue requires implementation
of novel treatment methods. Therefore, enhanced
techniques so-called Advanced oxidation processes
(AOPs) are gaining increasing attention.
Photocatalysis is a process based on the use of
different types of irradiations on a pollutants
adhered on a catalyst, driven by formation of
radicals and oxidative species on the catalyst
surface. Modern agricultural practice relies on use
of different classes of pesticides, and to its, often,
uncontrolled and excessive use. It leads to their
widespread in the environment, with frequent
detection in waterbodies and soil. Thiophanatemethyl
(TPM) is benzimidazole fungicide, used in
control of diverse groups of phytopatogenic fungus
[1].
Specifically efficient and economically viable
catalysts are TiO2-based. Multiphase catalysts
showed better results in the degradation of various
pollutants, so TiO2 P25 (Degussa) was used as a
material that boosts photocatalytic decomposition.
In order to advance and fasten the reaction, the
surface of TiO2 P25 was decorated with cerium (IV)
oxide [2]. Surface and photochemical properties of
newly obtained material are characterised by
HR - TEM, HAADF - STEM; FTIR and UV - DRS
methods.
In this study, the photocatalytic degradation of
thiophanate-methyl (TPM) in the presence of
CeO2 - P25 was investigated. Different
experimental conditions were varied, such as the
concentration of the pesticide solution and the mass
of the catalyst. Monitoring of the pesticide
concentration in the reaction system was based on
the decrease in absorbance using a Shimadzu 1800
UV spectrophotometer.
Results of textural and structural analyses prove
decoration of P25 surface with particles of cerium
(IV) oxide uniformly. Synthesised nanocatalyst
CeO2-P25 has lower band gap energy (2.90 eV) then
P25 (3.30 eV).
The optimal experimental conditions were
obtained using 0.07 g/L of CeO2-P25 and 5 mg/L of
TPM solution. Degradation reaction rate follows
pseudo-first order law. Complete degradation was
performed after 120 min. In experiments with TiO2
P25 catalyst (Degussa) degradation time was 240
min. Hence, it can be concluded that the synthesized
CeO2-P25 catalyst has better performance.",
publisher = "Ljubljana : University of Ljubljana Press",
journal = "22nd European Meeting on Environmental Chemistry EMEC22",
title = "The removal of thiophanate-methyl using novely synthesized catalysts CeO2-P25 under simulated sunlight: Structural characterisation and photocatalytic activity",
pages = "68-68",
doi = "10.55295/9789612970352"
}
