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Information × Registration Number 0220U101133, 0119U001824 , R & D reports Title Highly effective functional materials for modern electrochemical devices popup.stage_title Head Pohorenko Yuliia V., Registration Date 03-02-2020 Organization V.I. Vernadskii Institute of General & Inorganic Chemistry NAS of Ukraine popup.description2  The BiVO4 films were obtained by the ion layer (SILAR) on a titanium substrate with a nanotube (NT) TiO2 layer. Photoelectrochemical and optical studies of NT-TiO2 / BiVO4 electrodes have shown that the application of the ion-layering technique (SILAR) to the NT-TiO2 layer of BiVO4 promotes photosensitization of TiO2 to the visible spectrum. It has been found that for synthesis to obtain the optimum characteristics of photo anodes based on NT-TiO2 / BiVO4 films, it is necessary to use NT-TiO2 films up to 600 nm thick and BiVO4 up to 2-3 μm thick. The BiVO4 films were obtained by electrochemical synthesis using interferometric control of the film thickness. It is established that thick films of 1 - 2 microns have a lower quantum yield compared to films with a thickness of 200 - 400 nm. It is revealed that for the most effective increase of the photocurrent with ηk = 0.25 at λ = 400 - 450 nm, such photoanodes need to use BiVO4 thin films of 150-400 nm. Lithium ferric (II) phosphate (LiFePO4) in DES medium was synthesized: choline chloride-triethylene glycol (ChCl-TEG) ​​and choline chloride-ethylene glycol (ChCl-EG) using NH4FePO4 and CH3COOLi as precursors. The TEM, SEM, XRD methods show that single-phase nanocrystalline LiFePO4 plate morphology samples were obtained in ChCl-TEG, sediments synthesized in ChCl-EG are amorphous in nature. It was found that the mode of synthesis of LiFePO4 / C at 700 ° C, 1 h, does not lead to oxidation of LiFePO4 as evidenced by the values ​​of the ratio Fe2 + / Fe3 + for LiFePO4 and LiFePO4 / C, which are 2.4 and 2.7, respectively. By melting in argon, complex fluoride-conducting phases were synthesized based on the fluorides of the plumbum and the state with partial substitution of Pb2 + and / or Sn2 + ions by iso- and heterovalent ions (M = Li, K, Na, Rb, Ba, Y, Sm, Nd) in the compound. Pb0.86Sn1.14F4 with the structure of PbSnF4 and defined areas of solid solutions. Product Description popup.authors Galaguz Vadym А. Pohorenko Yuliia V. Smilyk Vitaliy O. popup.nrat_date 2020-04-02 Close