Naslov
Novel low-cost synthesis of transparent batio3-tio2 nanotube heterostructures for photocatalysis

Autori
Bohač, Mario ; Čižmar, Tihana ; Kojić, Vedran ; Juraić, Krunoslav ; Grčić, Ivana ; Andreja Gajović

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
27th Croatian Meeting of Chemists and Chemical Engineers and 5th Symposium Vladimir Prelog : Book of Abstracts / Marković, Dean ; Meštrović, Ernest ; Namjesnik, Danijel ; Tomašić, Vesna - : Hrvatsko kemijsko društvo, 2021, 69-70

Skup
27. hrvatski skup kemičara i kemijskih inženjera (27HSKIKI) ; 5. simpozij Vladimir Prelog

Mjesto i datum
Veli Lošinj, Hrvatska, 05.10.2021. - 08.10.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
BaTiO3, TiO2 nanotubes, photocatalysis

Sažetak
Titanium (IV) oxide, a semiconducting metal oxide praised by the scientific community for its chemical and mechanical stability and non- toxicity, has found its way into a vast array of uses ranging from pigments, food additives, ceramics, cosmetics, self-cleaning surfaces, batteries, photocatalysis, photovoltaics, sensors etc.[1] The implementation of TiO2 in photocatalysis has been extensively researched, especially nanostructured TiO2, that has almost completely shifted the scientific focus off of bulk TiO2 because of the large increase in its specific surface, in other words surface to volume ratio. Consequently, nanostructuring TiO2 results in increased numbers of photo-induced reactions, light absorption, photogenerated carrier density, photoreduction[2] and facilitates increased contact of the material with its surroundings.[3] To further improve photocatalysis, different nanomaterial modifications can be used e.g. doping, and surface modifications like bilayer or heterostructure formation. Heterostructure formation on TiO2 has been thoroughly researched and ranges from expensive variants involving noble metals like Au, [4] Ag[5] or Pt, [6] and much cheaper alternatives like Cu[7] or metal oxides like CuO[8] and ZnO.[9] Another interesting alternative to expensive noble metals is a perovskite semiconductor: barium titanate, BaTiO3 (BTO), a synthetic material usually used in electronic components, but recently there have been shown promising results regarding heterostructures with TiO2, precisely in perovskite solar cells, [10] relative humidity sensors[11] and photocatalysis[12] showcasing the shear versatility of this material. In this presenation we will show the preparation steps in a novel, low-cost and simple method of synthesizing BTO-TiO2 heterostructures and the results of the photocatalytic degradation of diclofenac under UV/Vis irradiation. Transparent TiO2 nanotube arrays were prepared by anodizing magnetron sputtered Ti thin films on conductive FTO covered glass and the BTO layers were prepared by spin coating Ba(OH)2 solutions on top of nanotubes and annealed to promote Ba2+ and TiO2 interactions. The structural properties of the samples were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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