Photoelectrochemical properties of the composites based on TiO2 nanotubes, CdSe and graphene oxide
| Autor: | M. O. Danilov, I. A. Slobodyanyuk, S. S. Fomanyuk, I. A. Rusetskyi, G. Ya. Kolbasov, V. S. Vorobets |
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| Rok vydání: | 2019 |
| Předmět: |
Nanocomposite
Materials science 010405 organic chemistry Graphene Oxide General Chemistry Photoelectrochemical cell 010402 general chemistry 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound symbols.namesake chemistry law Electrode symbols Crystallite Composite material Raman spectroscopy Leakage (electronics) |
| Zdroj: | Research on Chemical Intermediates. 45:4121-4132 |
| ISSN: | 1568-5675 0922-6168 |
| Popis: | The photoelectrochemical properties of electrodes based on a nanocomposite consisting of TiO2 nanotubes and CdSe films modified with graphene oxide have been studied. It is shown that in such a nanocomposite, a good adhesion of the CdSe layer to the substrate is provided. In this nanocomposite, the cathodic dark leakage currents are lower, and the efficiency of photoelectrodes is higher. From studies of Raman spectra, in which 2LO and 3LO phonon lines were observed, the quality of the modified polycrystalline films of CdSe was concluded. The amount of graphene oxide in NT-TiO2/CdSe/GO composite was determined to be 1.16 mass%, which allows one to obtain optimal photosensitivity of electrodes. It was established that the introduction of graphene oxide into semiconductor electrodes leads to an increase in their photosensitivity which is associated with a decrease of the surface recombination rate. The efficiency of the investigated nanocomposites in the photoelectrochemical cell for hydrogen production was studied together with composites based on graphene materials. |
| Databáze: | OpenAIRE |
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