https://repository.utm.md/handle/5014/37296 Chisinau, Republic of Moldova, June 30 - July 4, 2026 2026-10-14T01:22:06Z https://repository.utm.md/handle/5014/37382 Simultaneous removal of anionic and cationic dye mixtures from wastewater using calcined Zn₂–Al–CO₃ layered double hydroxides TABIA, Hind; EL KHATABI, El Hassan; ELHADIRI, Najat The discharge of wastewater containing dyes from textile, paper, leather, and dyeing industries represents a major environmental problem due to the high stability, toxicity, and persistence of these pollutants in aquatic environments. Industrial effluents frequently contain complex mixtures of anionic and cationic dyes, making their removal by conventional treatment methods particularly challenging. Therefore, the development of efficient and versatile adsorbent materials is essential for wastewater treatment. 2026-01-01T00:00:00Z https://repository.utm.md/handle/5014/37381 Interface engineering of TiO2/Sb2S3 thin film solar cells deposited by spray pyrolysis MERAH, Rayene; El KANOUNY, Abdessamad; TOMULESCU, Andrei Gabriel; LEONAT, Lucia Nicoleta; TAMIN, Messaoud; STANCU, Viorica; BESLEAGA, Cristina; DARENFAD, Warda; GALCA, Aurelian Catalin Interface engineering plays a critical role in improving the performance of Sb2S3 thin-film solar cells based on earth abundant materials. In this work, the introduction of a zinc oxide (ZnO) thin film as an interlayer between TiO2 and Sb2S3 is proposed to improve the interface quality and facilitate charge transport across the device structure. ZnO is widely used as an electron transport material due to its wide band gap and relatively high electron mobility which may improve the charge extraction and reduce interfacial recombination. The multilayer structure was fabricated using spray pyrolysis deposition. In particular, the spray process was performed under a nitrogen atmosphere using nitrogen gas as the carrier, which avoids possible formation of oxides [2] and better control over the deposition environment and improved film quality. To investigate the role of the interlayer, different ZnO deposition times were tested to tune the thickness of the ZnO layer and evaluate its influence on the properties of the heterostructure. The resulting films were studied through structural, optical, and morphological characterization to better understand how the ZnO interlayer affected the interface between TiO2 and Sb2S3. Attention was given to the influence of the ZnO interlayer on the structural quality and interface properties of the TiO2/Sb2S3 heterostructure. Authors acknowledge the M-ERA.NET Lightcell project “Quasi-1D materials for advanced thin-film photovoltaics” (contract No. 19/15.03.2024), the UEFISCDI PN-IV-PCB-RO-MD Empower project “Engineering Sustainable Antimony Chalcogenide Alloys for Customized Power Thin Film Photovoltaics” (contract No. 28PCBROMD/22.09.2025), and the COST Action Research and International Networking project “Emerging Inorganic Chalcogenides for Photovoltaics (RENEW-PV),” CA21148, supported by COST (European Cooperation in Science and Technology). 2026-01-01T00:00:00Z https://repository.utm.md/handle/5014/37380 Raman and DFT simulation spectra of some prevalent herbicide metabolites NASTAS, Luminița; BĂRĂGAU, Ioan-Alexandru; ALBRECHTSEN, Hans-Jorgen; GIZYNSKI, Konrad; VERESHCHAGINA, Elizaveta; RASOGA, Oana The use of pesticides in Europe poses significant environmental and public health challenges, leading to contamination of water sources like rivers and groundwater. Many regions exceed EU pesticide standards, highlighting the need for innovative monitoring methods that can deliver results more quickly than traditional methods, given the impact of pesticides on water quality [1]. Traditional Raman spectroscopy struggles with low sample concentrations but drop coating deposition Raman (DCDR) spectroscopy offers improved sensitivity for detecting weak signals in low-concentration samples [2]. This study investigates the Raman spectra of herbicide metabolites in Danish groundwater using the DCDR technique on gold surfaces. Key compounds examined include the pesticide metabolites Atrazine-2-hydroxy, Atrazine-desethyl, DPC, and 2,6-dichlorobenzamide (BAM). To facilitate rapid identification by this approach, we need to create a database of simulated Raman spectra for these pesticides. The spectra were acquired using a conventional Raman spectrometer (Horiba LabRAM HR Evolution Spectrometer), employing a 50x objective lens at maximum power (17 mW) with a 633 nm and/or 532 nm laser. The authors would like to thank the European Commission and the Research Council of Norway for funding in the frame of the collaborative international consortium STARDUST financed under the 2022 Joint call of the European Partnership 101060874 - Water4All. This work was also supported by a grant from the Ministry of Research, Innovation and Digitization, CNCS/CCCDI – UEFISCDI, project number COFUND-WATER4ALL-STARDUST-1, within PNCDI IV. Project no. WATER4ALL/I/20/STARDUST/2024 is cofinaced/financed by the National Centre for Research and Development under the Water4All Partnership Programme. 2026-01-01T00:00:00Z https://repository.utm.md/handle/5014/37379 Enhanced photocatalytic performance of titanium-phosphate glasses under visible-light irradiation El ABIAD, Marouane; ASSAMADI, Chaima; El MASLOUMI, Mohamed; BELAQZIZ, Majdouline; El ABIAD, Abdelaziz; AOUAD, Hakima This study presents an ongoing investigation into the photocatalytic properties of sodium–barium phosphate glass-ceramics containing titanium. These materials were designed within the phosphate glass system and subsequently subjected to controlled heat treatments in order to promote the formation of crystalline phases within the vitreous matrix. 2026-01-01T00:00:00Z