Author, Institution: Gabrielė Šarapajevaitė, Kaunas University of Technology
Science area, field of science: Technological Sciences, Chemical Engineering, T005
Scientific Supervisors: Prof. Dr. Kęstutis Baltakys (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Assoc. Prof. Dr. Paola Fabbri (University of Bologna, Italy, Material Science and Technology)
Dissertation Defense Board of Chemical Engineering Science Field:
Assoc. Prof. Dr. Irmantas Barauskas (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005) – chairperson
Assoc. Prof. Dr. Martino Colonna (University of Bologna, Italy, Technological Sciences, Materials Engineering, T008)
Assoc. Prof. Dr. Dario Frascari (University of Bologna, Italy, Technological Sciences, Chemical Engineering, T005)
Prof. Dr. Rimvydas Kaminskas (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Prof. Dr. Ramūnas Skaudžius (Vilnius University, Natural Sciences, Chemistry, N003)
Prof. Dr. Raimundas Šiaučiūnas (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Prof. Dr. Eugenijus Valatka (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Dissertation defense meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73 – 402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas)
Annotation: Copper sulfide (CuS) is a p-type semiconductor, characteristic of high theoretical specific charge capacity, high concentration of charge carriers and excellent ability to absorb light. These properties lead to CuS application in the fields of photocatalysis, energy storage, or green hydrogen production. The ability of CuS to generate free charge carriers by absorbing the irradiation of visible light is harvested by applying CuS for the advanced oxidation process and the degradation of dyes or antibiotics. In particular, the presently mentioned organic molecules are widely known wastewater pollutants whose presence in the water cycle enhances the unexpected acceleration of antimicrobial resistance. However, a sustainable and cost-effective approach to synthesize copper sulfide is not fully developed. The formation of CuS in aqueous solution under hydrothermal conditions by using the waste of sulfuric acid production as secondary raw material of sulfur was investigated in this thesis. The morphology, thermal stability and photocatalytic properties of synthesized samples were also studied in this work. To apply synthesized material on a large scale for the degradation of organic pollutants, the bio composites from poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and CuS were produced. The samples in porous and film structures were used to degrade tetracycline and methylene blue. The ability of composite to degrade organic molecules, be reused and degrade several organic molecules simultaneously was examined in this work.
June 19 d. 11:00
Rectorate Hall at Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
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