We are pleased to announce that a scientific publication based on the results of the project H-GREEN HORIZON-MSCA-2022-SE-01-01, Grant No 101130520, has been released: “Catalytic Degradation of the Organic Dyes in the Presence of the Multiphase Titanium Dioxide and Hematite and Gold Nanocomposites“, authored by: Olena Lavrynenko, Maksym Zahornyi, Nadiya Tyschenko, Oksana Kornienko, and Andrey Ragulya
Abstract:
Chemical synthesis of nanocomposite particles based on titanium dioxide modified with iron and gold was carried out. It was shown that, depending on the mass content of the doping species, the phase transformation of titanium hydroxide at T = 700 °C proceeds with the formation of either anatase (2 wt.%) or anatase and rutile (8 wt.%). The doping species form a hematite phase and gold clusters on the metal-oxide surface. A weakly crystalline anatase obtained by the transformation of metatitanic acid (MTA), with a particle size of 8 nm and a sulfur content of 0.036%, was selected as the co-catalyst. The anatase co-catalyst exhibits photocatalytic activity in the destruction of organic dyes. Its introduction into the TiO2&Fe2O3&Au nanocomposite suspension promotes the catalytic degradation of cationic and anionic dyes at temperatures ranging from 35 to 60 °C. It was observed that the degradation degree of the solutions after 150 min of catalytic process is the following: Methyl Orange (MO) – 72 %, Methylene Blue (MB) – 71.5 %, Rhodamine B (RhB) – 63.5 %, and Orange G (OG) – 47 %. The reaction rate constant depends on the composition of the dye, varying from 6.5·10-4 min-1 for OG to 2.56·10-3 min-1 for MB. The prospect of creating heterostructures based on TiO2 modified with hematite and gold, and their further adaptation for photocatalytic hydrogen production, is considered.
The article is published in «Nano Hybrids and Composites» and is available at: https://doi.org/10.4028/p-0XUQYc.
We invite you to read the paper and share it with interested colleagues and professionals!
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