Search Results - "Kovacheva, D."

Design and photocatalytic activity of nanosized zinc oxides by Gancheva, M., Markova-Velichkova, M., Atanasova, G., Kovacheva, D., Uzunov, I., Cukeva, R.

“…•There is correlation between synthesis, structure and properties of nanoscaled ZnOs.•The photocatalytic activity of ZnO under Vis radiation depends on its…”
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Corrosion behaviour of electrodeposited Zn-Cr alloy coatings by Chakarova, V., Boiadjieva-Scherzer, Tz, Kovacheva, D., Kronberger, H., Monev, M.

“…•Corrosion behaviour of electrodeposited Zn-Cr alloys in sulphate solutions.•The corrosion potential of the alloys is about 150 mV more positive than that of…”
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DFT study of the molecular and crystal structure and vibrational analysis of cisplatin by Georgieva, I., Trendafilova, N., Dodoff, N., Kovacheva, D.

“…DFT and periodic-DFT (PAW-PBE method, code VASP) calculations have been performed to study the structural and vibrational characteristics of…”
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Tunable nanosized spinel manganese ferrites synthesized by solution combustion method by Lazarova, Ts, Kovacheva, D., Georgieva, M., Tzankov, D., Tyuliev, G., Spassova, I., Naydenov, A.

“…The influence of the glycine-glycerol fuel mixing ratio on the structure, morphology, magnetic and catalytic properties of nanosized MnFe2O4 prepared by…”
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Crystal structure and spectroscopic determination of the phase transitions in methylammonium- and formamidinium bismuth iodide perovskites by Bukleski, M., Dimitrovska-Lazova, S., Makrievski, V., Tzvetkov, P., Marinšek, M., Skalar, T., Kovacheva, D., Aleksovska, S.

“…[Display omitted] •Crystal structure determination/confirmation of MABiI and FABiI.•Characterization of phase transitions (PT) in MABiI and FABiI by IR and…”
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Complete oxidation of hydrocarbons on YFeO3 and LaFeO3 catalysts by Markova-Velichkova, M., Lazarova, T., Tumbalev, V., Ivanov, G., Kovacheva, D., Stefanov, P., Naydenov, A.

“…•Synthesis of YFeO3 and LaFeO3 perovskite catalysts via sucrose assisted solution-combustion.•Intensive fluctuation between the different oxidation states of…”
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The mechanism of the isostructural phase transition in C(NH2)3PbI3 as a guide for understanding the properties of the new phase by Dimitrovska-Lazova, S., Bukleski, M., Tzvetkov, P., Pecovska-Gjorgjevich, M., Kovacheva, D., Aleksovska, S.

“…Hybrid organic-inorganic perovskites (HOIPs) have attracted considerable attention, especially organometal trihalide perovskite, as promising materials for…”
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Corrosion behavior of the ζ-CrZn13 phase obtained by annealing an electrodeposited Zn-Cr coating by Chakarova, V., Boiadjieva-Scherzer, Tz, Kovacheva, D., Kronberger, H., Monev, M.

“…•ζ-CrZn13 phase is obtained by annealing electrodeposited Zn-5.6%Cr coating.•Corrosion behavior of ζ-CrZn13 is compared to that of the as-deposited…”
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Activated carbons from used motor oil as catalyst support for sustainable environmental protection by Tsoncheva, T., Mileva, A., Marinov, S.P., Paneva, D., Velinov, N., Spassova, I., Kosateva, A., Kovacheva, D., Petrov, N.

“…Activated carbons obtained from used motor oil mixtures with furfural or coal tar pitch were prepared and tested as a host matrix of zinc and/or iron oxide…”
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Synthesis, Mössbauer study and catalytic properties of Cu-Ni-Fe- oxide/nitride mixed-phase materials by Velinov, N., Petrova, T., Ivanova, R., Tsoncheva, T., Kovacheva, D., Eliyas, A., Mitov, I.

“…Materials with cation ratio Cu:Ni:Fe = 0.5:0.5:2 were prepared by sol-gel auto-combustion technique using corresponding metal nitrates and citric acid as…”
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Activated Carbon from Used Motor Oils: Synthesis and Application as Supports of Nanosized Fe–Cr Oxides by Issa, G., Dimitrov, M., Marinov, S. P., Velinov, N., Spasova, I., Kovacheva, D., Tsoncheva, T.

“…The activated carbons were produced from waste biomass using a mixture of used motor oil and diverse plastic residues, such as high-density polyethylene and…”
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On the water-sorption properties of pectin by Panchev, I.N., Slavov, A., Nikolova, Kr, Kovacheva, D.

“…In this work we investigate the water-sorption isotherms of three types of pectins (from apple, citrus and sunflower) at 25 °C, 35 °C and 45 °C through the…”
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A short review on surface chemical aspects of Li batteries: A key for a good performance by Martha, S.K., Markevich, E., Burgel, V., Salitra, G., Zinigrad, E., Markovsky, B., Sclar, H., Pramovich, Z., Heik, O., Aurbach, D., Exnar, I., Buqa, H., Drezen, T., Semrau, G., Schmidt, M., Kovacheva, D., Saliyski, N.

“…We review herein several important aspects of surface chemistry in Li-ion batteries, and discuss the use of ionic liquids (ILs) for rechargeable Li batteries…”
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Carbonation process in cement with mineral additions of natural zeolite and silica fume – Early hydration period (minutes) up to 24 hours by Lilkov, V, Petrov, O, Kovacheva, D, Rostovsky, I, Tzvetanova, Y, Petkova, V, Petrova, N

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Auto-combustion synthesis, Mössbauer study and catalytic properties of copper-manganese ferrites by Velinov, N., Petrova, T., Tsoncheva, T., Genova, I., Koleva, K., Kovacheva, D., Mitov, I.

“…Spinel ferrites with nominal composition Cu 0.5 Mn 0.5 Fe 2 O 4 and different distribution of the ions are obtained by auto-combustion method. Mössbauer…”
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Preparation and characterization of silicagel from silicate solution obtained by autoclave treatment of copper slag by Marinkov, N., Markova-Velichkova, M., Gyurov, S., Kostova, Y., Spassova, I., Rabadjieva, D., Kovacheva, D., Penkov, I., Tzvetkova, Ch, Gentscheva, G.

“…The formation of silicagel from sodium silicate solution obtained by alkaline autoclave treatment of copper slag was investigated. The influence of the…”
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Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste gases emissions by NAYDENOV, A, KONOVA, P, NIKOLOV, Pen, KLINGSTEDT, F, KUMAR, N, KOVACHEVA, D, STEFANOV, P, STOYANOVA, R, MEHANDJIEV, D

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First principles study of structure and properties of La- and Mn-modified BiFeO3 by Antonov, V., Georgieva, I., Trendafilova, N., Kovacheva, D., Krezhov, K.

“…First principles calculations have been performed to study the effects of the La3+ and Mn3+ substitutions in the multiferroic BiFeO3. The real compositions…”
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Magnetron sputtering of Fe-oxides on the top of HTS YBCO films by Nurgaliev, T., Blagoev, B., Buchkov, K., Mateev, E., Gajda, G., Nedkov, I., Kovacheva, D., Slavov, L., Starbova, I., Starbov, N., Nankovski, M.

“…The possibilities for preparation of bilayers containing magnetic Fe-oxide (Fe-O) and high temperature superconducting (HTS) YBa2Cu3O7−x (YBCO) thin films were…”
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Biogenic nanosized iron oxides obtained from cultivation of iron bacteria from the genus Leptothrix by Nedkov, I., Slavov, L., Angelova, R., Blagoev, B., Kovacheva, D., Abrashev, M. V., Iliev, M., Groudeva, V.

“…A detailed investigation of nanostructured iron oxides/(oxy)hydroxides gathered after cultivation of bacteria from the genus Leptothrix as iron (II) oxidizers…”
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