Faculty of Technology and Metallurgy
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Item type:Publication, Optical properties of electrochemically polished and anodized niobium surfaces(First Regional Symposium on Electrochemistry of South-East Europe, 2008) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electrochemical passivation of niobium in KOH solutions(CROATIAN CHEMICAL SOC, 2006-12); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electrochemical characterization of the passive films formed on niobium surfaces in H2SO4 solutions(National Library of Serbia, 2006); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Active/Passive Transition of Niobium in Strong Acid and Alkaline Solutions(Sociedade Portuguesa de Electroquímica, 2006); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Thin Layers of Polyaniline/TiO2 Nano-particles Using Electrochemical Deposition(World Scientific and Engineering Academy and Society Press, 2007); Arsov, LjubomirBy cycling voltammetry the thin layers of polyaniline on mechanically polished Nb electrode from sulfuric aqueous solutions with aniline added were deposited. During the repetitive voltammetric scans, by simultaneous in-situ Raman spectroscopical measurements, the redox reactions and formation of degradation production in polymer film were investigated. It was found that the new monitored voltammetric waves appear only when the polyaniline reaches an over-oxidized state. The comparative measurements on Pt electrode in sulfuric aqueous solutions with aniline and TiO2 nano-particles added were also performed. It was shown that the TiO2 nano-particles inhibits the formation of degradation products. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electrochemical formation of semi-conducting oxides for solar energy conversion(WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC, 2007); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Reflectivity from electrochemically protected Nb surfaces(Engineering Society of Corrosion, 2015-06-15)Corrosion resistance of fine mechanically polished and electro-polished Nb surfaces were tested by elliposmetric measurements the reflectivity at various angle of incidence. The same measurements were also repeated on electro-polished Nb surface anodic ally oxidized in 1M H2SO4 during 30 s in the potential/voltage range from 0 to 100 V. From the minimum value of measured reflectivity parallel to plane of incidence, the Brewster angle for each investigated sample was determined. The simultaneous measurements of corrosion parameters Brewster angle have shown that the values of Brewster's angle should be used for fast testing the quality of protected metal surfaces. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Photoelectrochemical Study of Anodically Formed Oxide Films on Niobium Surfaces(CROATIAN CHEMICAL SOC, 2010-07)The semi-conducting properties of electrochemically formed oxide films onto Nb surface in 1 M H(2)SO(4) have been studied by photo-electrochemical measurements. By cyclic voltammetry the I vs. E profile of active/passive transition of Nb electrode has been recorded in the potential region from -0.5 to 8 V (SCE). The photocurrent maximums, band gap energies and flat potentials of anodic oxide films formed by stepwise rising of anodic voltage from 10 to 100 V on Nb electrode have been determined. Using Raman spectroscopy the development of crystalline structure in the films with different resultant thickness has been analysed. The semi-conducting properties of niobium oxides with development of crystalline structure have been discussed in term of breakdown processes in the films. The thresholds of transition from amorphous to crystalline form of anodic oxide films depending of applied voltages and time of polarization have been determined. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, TOWARDS SUSTAINABLE EXTRACTION OF OIL FROM APRICOT KERNELS(2026-02-12); Deep eutectic solvents (DES) are gaining attention as green alternatives to conventional volatile organic solvents for the extraction of natural products. Their ease of preparation from inexpensive, biodegradable components, along with low toxicity and tunable physicochemical properties, makes them promising candidates for designing eco-efficient extraction processes. In this work, four DES systems based on choline chloride (ChCl) as hydrogen bond acceptor and different hydrogen bond donors glycerol, lactic acid, acetic acid, and glucose were synthesized and evaluated as co-solvents with n-hexane for the ultrasonic-assisted extraction of oil from apricot kernels. The DESs were characterized in terms of pH, density (δ), viscosity (μ), and electrical conductivity (σ) to better understand how their physical properties influence extraction performance. Oil extraction experiments demonstrated that the DES composition and its physical properties have a marked impact on extraction efficiency. Under optimized ultrasonic conditions, the use of ChCl:AA (1:2) as a co-solvent with n-hexane yielded the highest oil recovery of 26.62%, surpassing pure n-hexane, which afforded only 24.10% under the same conditions. In contrast, ChCl:GLY (1:2), ChCl:LA (1:2), and ChCl:GLU (2:1) resulted in lower oil yields of 18.95%, 22.23%, and 13.26%, respectively. The superior performance of ChCl:AA is attributed to its combination of relatively low viscosity, and high conductivity, which collectively promote enhanced mass transfer, more efficient cell disruption, and improved solubilization of lipophilic components when assisted by ultrasonic cavitation. Overall, this study highlights the importance of tailoring the physicochemical properties of DES to maximize performance and demonstrates the potential of DES n-hexane systems as green, efficient, and scalable alternatives to conventional solvent based processes for the valorization of apricot kernel oil and other plant derived lipids. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Barrier Properties of Anodically Formed Nb2O5(Faculty of Technology and Metallurgy Belgrade, Serbia and Montenegro, 2005); ; Prusi, Abdurauf