Naslov
Application of TiO2-rGO nanocomposites for removal of diclofenac from water under simulated solar irradiation

Autori
Perović, Klara ; Kovačić, Marin ; Kušić, Hrvoje ; Lončarić Božić, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, ostalo

Skup
2020 11th International Conference on Environmental Science and Development (ICESD 2020)

Mjesto i datum
Barcelona, Španjolska, 10.02.2020. - 12.02.2020

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
diclofenac, nanocomposites, photocatalysis, TiO2-rGO

Sažetak
Pharmaceuticals that are widely used in human and animal medicine are often detected in the aquatic environment. Conventional wastewater treatment methods cannot remove micropollutants such as pharmaceuticals. Advanced oxidation processes (AOPs), especially TiO2 photocatalysis, are considered as a promising solution. In order to mitigate photogenerated charge recombination, which hinders photocatalytic performance, a titanium dioxide-reduced graphene oxide (TiO2- rGO) nanocomposite was prepared by hydrothermal method. The prepared composites were characterized by X- ray diffraction, Raman spectroscopy, thermogravimetric analysis, B.E.T. surface area analysis, and electron microscopy. Diclofenac (DCF) was chosen as a model target pollutant, as it is commonly detected in the aquatic environment. The photocatalytic performance of the prepared composite was investigated at pH values of 4, 6, and 8 and w(rGO) of 0.5 %, 2.75 % and 5.0% in accordance with a full-factorial experimental plan. Removal and degradation of DCF were monitored by high- performance liquid chromatography. Characterization of the photocatalyst revealed incorporation of rGO plates within the TiO2 matrix. Higher rGO wt.% have contributed to an increase in surface area. Results have shown that photocatalytic activity is highest in acidic conditions, due to significant adsorption of DCF, promoting degradation on the surface. By increasing the amount of rGO within the composite, the photocatalytic activity has been improved. The inclusion of rGO has shown to improve the photocatalytic performance of TiO2 for the degradation of DCF.

Izvorni jezik
Engleski

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