Facultatea de Matematică şi Informatică / Faculty of Methematics and Informatics

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Author: search.filters.author.Braniște, TudorStart date: 2024

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    ELABORAREA ȘI STUDIUL AEROMATERIALULUI ÎN BAZĂ DE TiO2 PENTRU APLICAȚII FOTOCATALITICE
    (CEP USM, 2024) Busuioc, Simon; Ciobanu, Vladimir; Braniște, Tudor; Zalamai, Victor; Ursachi, Veaceslav; Monaico, Eduard; Tighineanu, Ion
    We report on the fabrication process of TiO2 -based aeromaterial for environmental applica tions, such as wastewater treatment or as activated photocatalytic air filters. The TiO2 aeromate rial is obtained by Atomic Layer Deposition technique with the thickness of 50 nm on a substrate template consisting of ZnO microtetrapods, followed by the selective chemical etching of the ZnO template. The morphological and optical properties, chemical composition and crystalline quality of the fabricated aeromaterial are investigated. By implementing specific technological steps to enhance the crystalline quality of the TiO2 aeromaterial, it was possible to obtain materi als with either anatase phases or a mixed anatase-rutile phase.
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    DATE PRELIMINARE PRIVIND UTILIZAREA SPECTROSCOPIEI EDS PENTRU STUDIUL MATERIALULUI TEGULAR DIN PRIMELE SECOLE P. CHR.*
    (CEP USM, 2024) Matveev, Sergiu; Braniște, Tudor; Sprincean, Veaceslav
    In the mid 20th century near Sobari village (Soroca District, Republic of Moldova) was discovered an archaeological site dated with the 3rd-4th centuries AD identified as a Sântana de Mureş-Černjachov archeological culture site. Its uniqueness compared to other similar sites from the space between Prut and Dniester Rivers is determined by the presence of a stone structure enforced with mortar inside which was found a building with walls built of stone and brick, roof of tiles, glass window and peristyle made of wood pillars set on stone bases. Archaeological research statistic data reveals thousands of pieces of tile material. Besides this complex, within the limits of the site, were also identified several structures made of wood smeared with clay, one of which inside the stone precinct. The presence of such a complex in the barbarian environment at a distance of around 300 km from the Roman Empire border raised discussion regarding its origin. Several hypothesizes were advanced: according to one the site had been created by people with origins in the provincial Roman environment, according to other this site was an attempt to strengthen the seat of the local leader, other researchers included the site in the category of Roman commercial-craftsman factories etc. The researchers’ opinion regarding the origin of the tile material are divided as well, most of whom consider them to be brought from the Empire, while other think they are of local production.