Výsledky vyhledávání - "K. I. Papazova"

Study of the photodegradation of brilliant green on mechanically activated powders of zinc oxide

Autor: M. N. Gancheva, N. D. Yakushova, Sh. A. Syuleiman, I. A. Averin, E. I. Terukov, Nina Kaneva, K. I. Papazova, Assya Bojinova, D. Tz. Dimitrov, V. A. Moshnikov, I. A. Pronin

Publikováno v: Technical Physics. 62:1709-1713

A study of the photocatalytic activity of commercial and mechanically activated zinc oxide powders has been carried out based on the example of the decomposition of Brilliant Green. The goal of this work was to study the effect of the grinding time (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7598ea4f7337c1e8d54d6f4dc29bff57
https://doi.org/10.1134/s1063784217110287

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Green synthesis of UV and visible light active TiO2/WO3 powders and films for malachite green and ethylene photodegradation

Autor: Assya Bojinova, Alexander Eliyas, Emilia Stoyanova-Eliyas, K. I. Papazova, Dimitre Tz. Dimitrov, Nina Kaneva

Publikováno v: Reaction Kinetics, Mechanisms and Catalysis. 120:821-832

Powder nanocomposites of TiO2/WO3 are prepared by a simple solid-state thermal procedure from commercial oxide powders and cast thereafter as a film coating on TLC substrate. The WO3 content in the powder composites is varied from 0.5 to 50%. The pha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c95ed9e9515e9d9ba685858877af3024
https://doi.org/10.1007/s11144-016-1128-0

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Investigation of the electrical and ethanol-vapour sensing properties of the junctions based on ZnO nanostructured thin film doped with copper

Autor: Dimitre Tz. Dimitrov, Assya Bojinova, A. A. Karmanov, Nikolay K. Nikolaev, Tatyana V. Peshkova, Lyudmila K. Krasteva, V. A. Moshnikov, I. A. Averin, K. I. Papazova, I. A. Pronin, N. D. Yakushova, Nina Kaneva, Angelina Georgieva

Publikováno v: Applied Surface Science. 392:95-108

We present the investigation of ethanol sensing properties of the junctions composed by two plane-parallel nanostructured thin film electrodes. One of them consists of pure ZnO and the other one is composed of ZnO doped with Cu. The thickness of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8b63c157f0e38007add01090bb647ebf
https://doi.org/10.1016/j.apsusc.2016.08.049

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Effect of thermal and mechano-chemical activation on the photocatalytic efficiency of ZnO for drugs degradation

Autor: Nina Kaneva, Zara Cherkezova-Zheleva, Katerina Zaharieva, Dimitre Tz. Dimitrov, K. I. Papazova, Alexander Eliyas, Assya Bojinova

Publikováno v: Archives of Pharmacal Research. 39:1418-1425

Over the past few years, pharmaceutical drugs have been considered as emerging pollutants due to their continuous input and persistence in the aquatic ecosystem even at low concentrations. They have been detected worldwide in environmental matrices,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5572315bcd2e8628e3a12e3a1b52d758
https://doi.org/10.1007/s12272-016-0789-6

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A new type of gas sensor based on the thermovoltaic effect in zinc oxide inhomogeneously doped with mixed-valence impurities

Autor: E. I. Terukov, I. A. Averin, D. Ts. Dimitrov, I. A. Pronin, V. A. Moshnikov, N. D. Yakushova, L. K. Krasteva, A. A. Karmanov, A. Ts. Georgieva, K. I. Papazova

Publikováno v: Technical Physics Letters. 43:825-827

We propose a new type of potentiometric gas sensor operating on the basis of the thermovoltaic effect in uniformly heated (without temperature gradients) ZnO/ZnO–Fe sandwich structures obtained by the sol–gel method. It is established that a sign

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb1b91b32b72fea0d24ad5431a13a9e8
https://doi.org/10.1134/s1063785017090255

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Structures of nanowires with Zn-ZnO:CuO junctions for detecting ethanol vapors

Autor: V. A. Moshnikov, N. K. Nikolaev, S. S. Nalimova, D. Ts. Dimitrov, I. E. Kononova, E. I. Terukov, A. S. Bozhinova, K. I. Papazova, Tatyana V. Peshkova

Publikováno v: Technical Physics. 59:771-776

The synthesis of ZnO-ZnO:CuO structures in the form of overlapping layers of nanowires of pure and copper oxide-doped zinc oxide is described. These structures are tested as ethanol vapor sensors. The following two-stage method is used to form ZnO:Cu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a57cf5df7483b3370b1aa686b5205a9
https://doi.org/10.1134/s1063784214050259

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Photocatalytic oxidation of pharmaceuticals on thin nanostructured Zinc Oxide films

Autor: K. I. Papazova, I. A. Averin, D. Ts. Dimitrov, V. A. Moshnikov, A. S. Bozhinova, Nina Kaneva, I. A. Pronin

Publikováno v: Kinetics and Catalysis. 55:167-171

The photocatalytic activity of thin ZnO films in the photocatalytic oxidation of the pharmaceuticals, paracetamol and chloramphenicol (Levomycetin) is reported. The films annealed at 500°C exhibit the highest activity. They have a wurtzite-like stru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f513ec7bfb4a58388401ceb71d0f927
https://doi.org/10.1134/s0023158414020074

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Theoretical and experimental investigations of ethanol vapour sensitive properties of junctions composed from produced by sol–gel technology pure and Fe modified nanostructured ZnO thin films

Autor: N. D. Yakushova, Assia S. Bojinova, Ludmila K. Krasteva, I. A. Averin, Vyacheslav A. Moshnikov, Angelina Georgieva, K. I. Papazova, Dimitre Tz. Dimitrov, I. A. Pronin, Alexandar S. Chanachev

Publikováno v: Sensors and Actuators A: Physical. 206:88-96

Nanosized thin films of pure and Fe modified ZnO are used to construct the composed by two plane-parallel nanostructured thin film electrodes sensing junctions. The lower and upper layers overlap is kept ∼80 mm2 for all of the investigated samples.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d21c995ee5d845a320e4c406ba26e91
https://doi.org/10.1016/j.sna.2013.11.035

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The thermovoltaic effect in zinc oxide inhomogeneously doped with mixed-valence impurities

Autor: A. Ts. Georgieva, E. I. Terukov, A. S. Bozhinov, A. A. Karmanov, V. A. Moshnikov, I. A. Averin, N. D. Yakushova, I. A. Pronin, K. I. Papazova, D. Ts. Dimitrov

Publikováno v: Technical Physics Letters. 41:930-932

The thermovoltaic effect has been for the first time observed in zinc oxide. The samples had the form of ZnO/ZnO–Me sandwich structures (Me = Cu, Fe) formed by the sol–gel method. An electromotive force of 1–10 mV appeared in the temperature ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::11440497aca5ded5350276110a633b15
https://doi.org/10.1134/s1063785015100132

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Study of the photocatalytic and sensor properties of ZnO/SiO2 nanocomposite layers

Autor: I. E. Kononova, Vyacheslav A. Moshnikov, A. S. Bozhinova, Sh. A. Syuleiman, S. S. Nalimova, E. I. Terukov, Nina Kaneva, K. I. Papazova, D. Ts. Dimitrov

Publikováno v: Semiconductors. 47:1636-1640

ZnO/SiO2 nanocomposite layers are deposited onto glass substrates by the sol-gel method. The fraction of SiO2 is 20%. The layers are produced by single or double deposition and sol centrifugation. To study the photocatalytic properties of the samples

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85ae6754143035f1d0c6ed5ab07ea9c5
https://doi.org/10.1134/s106378261312004x

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