Abstract
In this work, chitosan-TiO2 nanocomposites (NСs CS-TiO2) were developed for the photocatalytic degradation of some representatives of polycyclic aromatic hydrocarbons (PAHs). TiO2 nanoparticles (NPs) were synthesized by laser ablation method and their sizes were determined by dynamic laser light scattering (DLLS). Anthracene and pyrene in micellar solution were used as representatives of PAHs. The effect of TiO2 in the composition of prepared nanocomposites on the photodegradation of PAHs in model environments under UV irradiation was studied. The method of solid-phase luminescence (SPL) was used to estimate the decrease in PAHs concentrations. Based on the results of the studies carried out, pseudo-first order photodegradation kinetics were plotted. The efficiency of using the nanocomposites for the photocatalytic degradation of anthracene and pyrene was proved.
Highlights
polycyclic aromatic hydrocarbons (PAHs) are compounds containing two or more fused benzene rings in the molecule
A luminescent analysis of the manufactured samples was performed to study the processes of photocatalytic degradation of ANTR and PYRE using NCs CS-TiO2
According to the literature data [29], the absorption bands at these wavelengths are characteristic of the anatase phase of TiO2
Summary
PAHs are compounds containing two or more fused benzene rings in the molecule. Compounds of this group are found everywhere in the environment. PAHs are dangerous pollutants and are classified as compounds with significant risk to human health [1]. It was found that the content of PAH group substances in the environment is exceeded, the risk of developing cancer increases many times [2]. In this regard, it is to study the methods of degradation of PAHs, in particular with photocatalytic reactions [3]
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