Kremena Koleva Assistant, PhD (+359 2) 9792528 email: kremena_vassileva@abv.bg

Main fields of research

• Heterogeneous catalysis;
• Ferrites;
• X-Ray Diffraction;
• Mössbauer spectroscopy;
• Ecology and Enviromental protection.

Publications:

1. N. Velinov, E. Manova, T. Tsoncheva, D. Paneva, B. Kunev, K. Koleva, I. Mitov „Mechanochemical synthesis of mixed Cu-Co ferrite”, Tribulogical Journal Bultrib, 02, 56-60, 2012.
2. N. Velinov, E. Manova, T. Tsoncheva, Claude Estoumes, D. Paneva, K. Tenchev, V. Petkova, K. Koleva, B. Kunev, I. Mitov „Spark plasma sintering synthesis of Ni1-xZnxFe2O4 ferrites: Mössbauer and catalytic study”, Solid State Sciences, 14, 1092-1099, 2012.
3. N. Velinov, K. Koleva, T. Tsoncheva, E. Manova, D. Paneva, K. Tenchev, B. Kunev, I. Mitov „Nanosized Cu0.5Co0.5Fe2O4 ferrite as catalyst for methanol decomposition: Effect of preparation procedure”, Catalysis Communications, 32, 41-46, 2012.
4. K. V. Koleva, N. I.Velinov, T. S. Tsoncheva, V. S. Petkova, M. G. Shopska, I. G. Mitov „Synthesis and catalytic properties of Cu0.5Zn0.5Fe2O4 ferrite” International Scientific Publications: Materials, Method and Technologies 7 (1), 362–371, 2013.
5. K. Koleva, N. Velinov, B. Kunev and I. Mitov, „Mechanochemical synthesis and characterization of ZnFe2O4”, Tribological Journal BULTRIB, 3, 2013.
6. K. Koleva, N. Velinov, T. Tsoncheva, I. Mitov, B. Kunev „Preparation, structure and catalytic properties of ZnFe2О4” Bulgarian Chemical Communication, 45, 434-439, 2013.
7. K. Koleva, N. Velinov, T. Tsoncheva, I. Mitov, „Mössbauer study of Cu1-xZnxFe2O4 catalytic materials” Hyperfine Interaction, Hyperfine Interactions, 226, 89-97, 2014.
8. N. Velinov, K. Koleva, T. Tsoncheva, D. Paneva, E. Manova, K. Tenchev, B. Kunev, I. Genova, I. Mitov „Copper-cobalt ferrites as catalysts for methanol decomposition”, Central European Journal of Chemistry 12 (2), 250-259, 2014.
9. K. Koleva, N. Velinov, T. Tsoncheva, I. Mitov „Synthesis and catalytic properties of nanocrystalline copper-zinc ferrite” Nanoscience and nanotechnology, 14, 35-38, 2014.
10. K. Koleva, N. Velinov, T. Tsoncheva, I. Mitov „Preparation, structure and catalytic properties of copper-zinc ferries”, Bulgarian Chemical Communications, 47, 1348-353, 2015.