Cu-doped nanotube photocatalyst for carbon dioxide conversion in methane
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2020-03-13 12:48
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COVALIOVA, Olga. Cu-doped nanotube photocatalyst for carbon dioxide conversion in methane. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 169. ISBN 978-9975-62-428-2.
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Achievements and perspectives of modern chemistry 2019
Conferința "International Conference "Achievements and perspectives of modern chemistry""
Chişinău, Moldova, 9-11 octombrie 2019

Cu-doped nanotube photocatalyst for carbon dioxide conversion in methane


Pag. 169-169

Covaliova Olga
 
Institute of Chemistry
 
Disponibil în IBN: 7 noiembrie 2019


Rezumat

Catalytic production of methane and other hydrocarbon fuels by the carbon dioxide conversion in gaseous phase with water vapour under the influence of the large range of the wavelengths of solar irradiation is a perspective process promoting the resolving of energy problem and reducing of greenhouse gases emissions in atmosphere. To make this process efficient, there is a need to substantially enlargen the adsorption spectrum of TiO2. It was shown [1, 2] that doping can essentiallybroaden the adsorption spectrum of Ti oxide, modifies the redox potential of running processes, promotes the free radicals formation and rises the quantum efficiency due to the decreasing the recombination degree of electrons and holes. A method was elaborated of TiO2 nanotubes array production doped with metal (Cu) from low-concentrated solution. The experimental set-up proposed (Fig.1) implies the possibility of vacuuming. It was found that due to the application of ultrasound, following the vacuuming of working solution, it became possible to cover the external and internal surface of nanotubes with thin metal layer.Fig. 1. Functional scheme of the experimental set-up for the TiO2 nanotubes doping with metals: 1 – reservoir; 2 – anodes; 3 – porous cathode; 4 – pump; 5 – manometer; 6 – solenoid; 7 – 8 – valve.The samples of nanotubular TiO2 doped with Cu ions, as compared to pure titaniumdioxide, have high erelectroconductivity (p-type), and their electro-neutral condition is determined by the electrons transfer from the valence zone with holes formation, ensuring the better photo-catalytic properties of the formed material.