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Deposition of BaTiO3 Films from EthanoI-PVB Medium

Journal of Chemistry and Chemical Engineering 2014年第6期8卷 564-569页

作者： maksim zagorny anna ivanchuk volodymyr pidsosonnyi alexander zhygotsky andrey ragulya Department of Physical Chemistry and Technology of Nanostructure Ceramic and Composites Ivan Nikitovich Frantsevich Institutefor Problems of Materials Science of the National Academy of Sciences of Ukraine Kiev 03680 Ukraine

EPD （electrophoretic deposition） of barium titanate from organic medium ethanol-PVB （polyvinyl butyral） was performed on Ni, Ti, steel substrate. Stable BaTiO3 suspensions with concentration of 2 wt.% have been prepared for the deposition. A uniform and dense layer was obtained for films deposited from ethanol with PVB of 0.1%. The surface topology of deposited films can be controlled via the applied voltage. This method allows to obtain crack-free and smooth layers BaTiO3 from organic medium with thickness of 4-20 μm.

关键词： BaTiO3 suspension EPD deposition time PVB film.

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Fabrication of Titanate Barium Films by Electrophoretic Deposition Technique

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Journal of Chemistry and Chemical Engineering 2014年第3期8卷 254-259页

作者： maksim zagorny volodymyr pidsosonnyi annalvanchuk alexander zhygotsky andrey ragulya Department of Physical Chemistry and Technology of Nanostructure Ceramic and Composites Ivan Nikitovich Frantsevich Institutefor Problems of Materials Science of NAS of Ukraine Kiev 03680 Ukraine

EPD （electrophoretic deposition） technique has been shown as an effective method to produce thin ore thick layers at voltage 5-100 V onto Ni conductive substrate. The aim of this study is to use the EPD method to fabricate films from suspensions BaTiO3. The effects of the EPD process parameters such as the suspension concentration, deposition time, electrical field strength on the specific EPD deposited weight, morphology particles were used. The surface microstructures of the as-deposited films were investigated by SEM （scanning electron microscopy）. A homogeneous microstructure was obtained at applied electric field of 100 V and I min of deposition time at an electrode distance of 1.0 cm.

关键词： BaTiO3 suspension EPD deposition time viscosity olygoperoxide.

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Mesoporous Structure and Photocatalytic Activity of Doped Polyanilines

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Journal of Chemistry and Chemical Engineering 2013年第12期7卷 1121-1126页

作者： maksim zagorny alexander zhygotsky Tatyana Lobunets Anatoliy Pozniy andrey ragulya Department of Physical Chemistry and Technology of Nanostructure Ceramic and Composites Ivan Nikitovich Frantsevich Institutefor Problems of Materials Science of NAS of Ukraine Kiev 03680 Ukraine

Photocatalytic activity of doped polyaniline nanopowders with different molar ratio of An/O （aniline^oxidizer） has been studied in the process of photocatalytic decolorization of aqueous solutions of methylene blue. By means of scanning electron microscopy and low-temperature N2 adsorption method, it was found that doped PANI （polyaniline） nanopowders have the particles size of 30-50 nm with the specific surface area of 20-35 m2.g＂~. It was found that PANI photocatalytic activity essentially depends on molar ratio of An/O and adsorption interactions between the dye molecules and catalytic active centers on PANI surface and these interactions are greatly affected by pH of the solution 9.2. An optimum of the synergetic effect is found for an initial molar ratio of aniline to oxidizer equal to 0.8.

关键词： Photocatalyst doped polyaniline conducting polymer mesoporous structure.

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Surface Structure, Spectroscopic and Photocatalytic Activity Study of Polyaniline/TiO2 Nanocomposites

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Journal of Chemistry and Chemical Engineering 2014年第2期8卷 118-127页

作者： maksim zagorny Igor Bykov andrey Melnyk Tatyana Lobunets alexander zhygotsky Anatoliy Pozniy alexander Shirokov andrey ragulya Department of Physical Chemistry and Technology of Nanostructure Ceramic and Composites Ivan Nikitovich FrantsevichInstitute for Problems of Materials Science of NAS of Ukraine Kiev 03680 Ukraine Institute for Sorption and Problems of Endoecology of NAS of Ukraine Kiev 03164 Ukraine

PANI （polyaniline） as a promising conducting polymer and photosensitizer has been used to prepare PANI/TiO2 （polyaniline/TiO2） nanocomposite as photocatalyst. TiO2 nanoparticles with size of 5-100 nm were encapsulated by PANI via the ＂in situ＂ polymerization of aniline on the surface of TiO2 nanoparticles. IR, SEM, EPR techniques were used to characterize the mechanism of electron interaction in PANI/TiO2 nanocomposite. The resulting PANI-modified TiO2 composites exhibit significantly higher photocatalytic activity than that of neat PANI on degradation of MB （methylen blue） aqueous solution under UV irradiation.

关键词： Photocatalyst TiQ nanoparticle polyaniline conducting polymer nanocomposite.

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