• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Procedure to obtain a titanium sheet with photocatalytic activity. The invention relates to a process for obtaining a titanium sheet which has a layer of titanium dioxide in the anatase phase on its surface and which possesses photocatalytic activity, as well as to the sheet thus obtained and to a construction material containing it. The titanium sheet of the present invention and the construction materials obtained therefrom provide a double aesthetic and decontaminating functionality. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2616276A1
    申请号:ES201531793
    申请日:2015-12-11
    公开日:2017-06-12
    发明作者:Francisco FERNÁNDEZ MARTÍNEZ；Mercedes Del Río Merino；Irene GONZÁLEZ MORÁN
    申请人:Universidad Politecnica de Madrid；
    IPC主号:
    专利说明:

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    of facades. However, the sheet of the invention can be incorporated into different construction elements in order to give rise to a more sophisticated construction material and even for decorative or aesthetic purposes.
    The last object of the present invention is the use of the sheet or the construction material of the invention. On the one hand, said use comprises the decontamination of gaseous media or environments containing hydrogen sulfide, sulfur dioxide, nitrogen oxides or volatile organic compounds (VOCs).
    The sheet or the construction material of the invention is also useful for the decontamination of liquid media or environments and as a liquid stream neutralizer.
    Additionally, the sheet and the material of the invention can be used for decorative purposes of facades and coatings due to the aesthetic effect produced by the different shades that can be acquired.
    A series of examples are given below to illustrate the invention but are not intended to be limiting thereof.
    EXAMPLES Example 1: Preparation of a titanium plate by electrolysis with titanium cathode and heat treatment
    First, the surface of the titanium sheet was cleaned with propanone. The titanium sheet was subjected to an electrolytic oxidation in which the electrolyte used was 0.5% by weight sulfuric acid in water. For the realization of this anodizing a potentiostat was used and was carried out at a voltage of 60V and with a current of 10 mA / m2.
    As a cathode a titanium cylinder was used and the maintenance time was one minute since the maximum voltage was reached. It should be added that the electrolyte was not centrifuged during anodizing, nor was there a circular network surrounding the sample, unlike other anodizing methods.
    Subsequently the product was cleaned again with propanone and placed in a preheated oven and a temperature of 500 ° C was reached. The product remained in
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    the oven for a period of two hours. The color obtained is shown in Figure 1 by measuring the reflectance. Example 2: Preparation of a titanium sheet by electrolysis with a 5-carbon cathode and heat treatment
    First, the surface of the titanium sheet was cleaned with propanone. The titanium sheet was subjected to an electrolytic oxidation in which the electrolyte used was 0.5% by weight sulfuric acid in water. For the realization of this anodizing, a
    10 potentiostat and was carried out at a voltage of 60V and with a current of 10 mA / m2.
    A carbon cylinder was used as a cathode and the maintenance time was one minute since the maximum voltage was reached. It should be added that the electrolyte was not centrifuged during anodizing, nor was there a circular network surrounding the sample, unlike other anodizing methods.
    The product was subsequently cleaned again with propanone and placed in a preheated oven and a temperature of 500 ° C was reached. The product was kept in the oven for a period of two hours. The color obtained is shown in Figure 2 by measuring the reflectance. 20 Example 3: Preparation of a titanium plate by electrolysis with platinum cathode and heat treatment
    First, the surface of the titanium sheet was cleaned with propanone. The titanium sheet was subjected to an electrolytic oxidation in which the electrolyte used was acidic
    25 sulfuric in water at 0.5% by weight. For the realization of this anodizing a potentiostat was used and was carried out at a voltage of 60V and with a current of 10 mA / m2.
    As a cathode a platinum cylinder was used and the maintenance time was one minute since the maximum voltage was reached. It should be added that the electrolyte was not centrifuged during anodizing nor was there a circular network surrounding the sample, unlike
    30 other methods of anodizing.
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    Subsequently the product was cleaned again with propanone and placed in a preheated oven, and a temperature of 500 ° C was reached. The product was kept in the oven for a period of two hours. The color obtained is shown in Figure 3 by measuring the reflectance. Example 4: Preparation of a titanium plate by electrolysis with platinum cathode without heat treatment
    This process was carried out analogously to that of example 3 above, however in this case the maintenance time of the electrolysis process was ninety minutes since the maximum voltage was reached. Also, the heat treatment was not carried out as in the previous case. The color obtained is shown in Figure 4 by measuring the reflectance. Example 5: Analysis of the structure of the titanium dioxide surface layer of the different sheets
    To learn more about the composition and structure of this layer, X-ray tests were carried out with a diffractometer on the plates obtained in examples 1, 2, 3 and 4. To do this, the radiation K from a lamp is affected X-ray with a copper cathode on the sample, measuring the intensity of the diffracted radiation with a detector. The intensity measurement is made by varying the angle of incidence, which should vary in the same way that the measurement angle varies with the detector. The simplified phenomenon would be a phenomenon of reflection, which, given in more internal crystalline layers, is called diffraction. The detection of the position of the diffraction maxima according to the angle allows us, using Bragg's law, to identify the crystalline phases. In this case, to differentiate the most common crystallographic phases, it is enough to perform the registration in the angular range of 22.8º to 28.8º in 2 Theta, where the most intense peaks of the two crystalline phases, rutile and anatase appear. The appearance of a peak at 25.3º would indicate that the crystalline phase formed is Anatase, while if the maximum appeared at the angular position of 27.3º it would be the Rutile crystalline variety. The diffraction diagram of the TiO2 commercial catalyst from Degussa is shown in Figure 5, which shows the presence of the two crystalline phases, although the majority is the Anatasa variety. In contrast, in all diffraction diagrams of the samples obtained
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    by the procedures set forth in the present patent, only the peak at 25.3 ° appears, indicating that only the Anatase crystalline phase has formed and that the Rutile phase does not appear as impurity.
    Figure 5 shows that the variety of titanium oxide that appears has the form
    5 crystalline titanium dioxide, anatase variety, which is the most suitable for the operation of the photocatalysis and decontamination process, one of the functions of the material described in this invention. Example 6: Analysis of the photocatalytic activity of the different plates
    The effectiveness of photocatalysis of the plates of examples 1, 2, 3 and 4 was checked with
    10 a test that consists of subjecting the sample for 6 hours to a lamp, whose spectrum is similar to natural light. The sample, together with a solution of rhodamine B in water, accentuates the degradation of this organic dye and thus determines the effectiveness of the synthesized material. Reductions in the concentration of rhodamine B for each plate are shown in the following table;
    15 Table 1: Oxidation power on Rhodamine B of the plates obtained by catalytic oxidation with different cathodes. The samples are named with the symbol of each element or cathode used and with TT the ones that have undergone heat treatment are indicated. As a reference, the aqueous Rhodamine B solution was simply used without containing a sample.
    Specimen (N) 20 Reduction of rhodamine concentration (%)
    Reference 7
    C TT Ti TT Pt TT Pt 90 ’ 57 74 44 43
    As can be seen in the table, all the plates of the invention show a significant photocatalytic activity against the reference sample. However, the plates obtained in examples 1 and 2 with titanium and carbon cathodes showed an activity
    25 higher than those obtained in examples 3 and 4 with platinum cathodes.
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    权利要求:
    Claims (1)
    [1]
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    同族专利:
    公开号 | 公开日
    ES2616276B2|2018-02-09|
    WO2017098070A1|2017-06-15|
    EP3388148A1|2018-10-17|
    MA43423A|2018-10-17|
    EP3388148A4|2019-01-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2008302328A|2007-06-08|2008-12-18|National Univ Corp Shizuoka Univ|Method for manufacturing titanium oxide film-formed member, photocatalyst, photoelectrode, and water treatment apparatus|
    US20110160047A1|2008-06-27|2011-06-30|Naoya Masahasshi|Rutile-type titanium dioxide photocatalyst|
    EP2438990A1|2009-06-01|2012-04-11|Nippon Steel Corporation|Titanium-based material responsive to visible light and having excellent photocatalytic activity, and process for producing same|
    WO2015022960A1|2013-08-12|2015-02-19|東洋精箔株式会社|Visible light-responsive photocatalyst body and method for producing same|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201531793A|ES2616276B2|2015-12-11|2015-12-11|Procedure to obtain a titanium plate with photocatalytic activity|ES201531793A| ES2616276B2|2015-12-11|2015-12-11|Procedure to obtain a titanium plate with photocatalytic activity|
    PCT/ES2016/070864| WO2017098070A1|2015-12-11|2016-12-07|Method for obtaining a sheet of titanium with photocatalytic activity|
    EP16872465.6A| EP3388148A4|2015-12-11|2016-12-07|Method for obtaining a sheet of titanium with photocatalytic activity|
    MA043423A| MA43423A|2015-12-11|2016-12-07|PROCESS FOR OBTAINING A LAYER OF TITANIUM WITH PHOTOCATALYTIC ACTIVITY|
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