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  • Walter de Gruyter GmbH  (3)
  • 2010-2014  (3)
  • 1
    Online Resource
    Online Resource
    Preparation, characterization and photocatalytic activity of Co3O4/LiNbO3 composite
    Walter de Gruyter GmbH ; 2013
    In:  Open Chemistry Vol. 11, No. 6 ( 2013-6-1), p. 920-926
    Details
    In: Open Chemistry, Walter de Gruyter GmbH, Vol. 11, No. 6 ( 2013-6-1), p. 920-926
    Abstract: The Co3O4/LiNbO3 composites were synthesized by impregnation of LiNbO3 in an aqueous solution of cobalt nitrate and next by calcination at 400°C. The activity of produced samples has been investigated in the reaction of photocatalytic hydrogen generation. The crystallographic phases, optical and vibronic properties were studied using X-ray diffraction (XRD), diffuse reflectance (DR) UV-vis and resonance Raman spectroscopic techniques, respectively. The influence of cobalt content (range from 0.5 wt.% to 4 wt.%) on the photocatalytic activity of Co3O4/LiNbO3 composites for photocatalytic hydrogen generation has been investigated. Co3O4/LiNbO3 composites exhibited higher than LiNbO3 photocatalytic activity for hydrogen generation. The highest H2 evolution efficiency was observed for Co3O4/LiNbO3 composite with 3 wt.% cobalt content. The amount of H2 obtained in the presence of LiNbO3 and Co3O4/LiNbO3 (3 wt.% of cobalt content) was 1.38 µmol/min and 2.59 µmol min−1, respectively.
    Type of Medium: Online Resource
    ISSN: 2391-5420
    URL: Article
    DOI: 10.2478/s11532-013-0235-2
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2013
    detail.hit.zdb_id: 2825411-9
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  • 2
    Online Resource
    Online Resource
    Photocatalytic properties of transparent TiO2 coatings doped with neodymium
    Walter de Gruyter GmbH ; 2012
    In:  Polish Journal of Chemical Technology Vol. 14, No. 3 ( 2012-10-1), p. 1-7
    Details
    In: Polish Journal of Chemical Technology, Walter de Gruyter GmbH, Vol. 14, No. 3 ( 2012-10-1), p. 1-7
    Abstract: In this work photocatalytic properties of TiO2 thin fi lms doped with 8.51 at. % of Nd were described. The self-cleaning phenomenon of thin fi lms was discussed together with the structural, optical and surface properties of prepared thin fi lms. Transparent coatings based on titanium dioxide were manufactured by high-energy reactive magnetron sputtering process. Incorporation of Nd during sputtering process results in amorphous behavior, without a signifi cant infl uence on transparency and colour as compared to the undoped TiO2-rutile matrix. Nevertheless, doping with neodymium doubles the photocatalytic activity of the matrix due to higher quantity of photo-generated charge carriers and more effi cient mechanism of energy transfer.
    Type of Medium: Online Resource
    ISSN: 1899-4741 , 1509-8117
    URL: Article
    DOI: 10.2478/v10026-012-0077-2
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2012
    detail.hit.zdb_id: 2402116-7
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  • 3
    Online Resource
    Online Resource
    Photocatalytic properties of nanocrystalline TiO2 thin films doped with Tb
    Walter de Gruyter GmbH ; 2011
    In:  Open Physics Vol. 9, No. 2 ( 2011-4-1), p. 354-359
    Details
    In: Open Physics, Walter de Gruyter GmbH, Vol. 9, No. 2 ( 2011-4-1), p. 354-359
    Abstract: In this work photocatalytic properties of TiO2 thin films doped with different amount of Tb have been described. Thin films were prepared by high energy reactive magnetron sputtering process. Comparable photocatalytic activity has been found for all doped TiO2 thin films, while different amounts of Tb dopant (0.4 and 2.6 at. %) results in either an anatase or rutile structure. It was found that the terbium dopant incorporated into TiO2 was also responsible for the amount of hydroxyl groups and water particles adsorbed on the thin film surfaces and thus photocatalytic activity was few times higher in comparison with results collected for undoped TiO2 thin films.
    Type of Medium: Online Resource
    ISSN: 2391-5471
    URL: Article
    DOI: 10.2478/s11534-010-0113-x
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2011
    detail.hit.zdb_id: 2814058-8
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