Influence of Thermal Post-Treatment on Electrophysical Properties of Carbon Modified Anodic TiO&lt;inf&gt;2&lt;/inf&gt; NTs

Savchuk, Timofey; Yakubov, A. O.; Gavrilin, Ilya; Dronova, Daria; Dronov, Alexey

doi:10.1109/eiconrus.2019.8656652

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also shown that doping with non-metals S, C, and N [19,20] makes it possible to expand the absorption spectrum of titanium oxide due to the formation of energy levels in the band gap of the semiconductor. In turn, the modification of titanium oxide by carbon can solve three symmetric problems for photocatalysis applications: reduce the electrical resistance, improve the separation of photogenerated charge carriers and increase the photoactivity of the material in the visible light range [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Treatment of Symmetric TiO2 Nanotube Arrays in Argon on Photocatalytic CO2 Conversion

et al. 2022

Self Cite

View full text Add to dashboard Cite

Symmetric titania nanotube arrays (TiO2 NTs) are a well-known photocatalyst with a large surface area and band edge potentials suitable for redox reactions. Thermal treatment of symmetrical arrays of TiO2 nanotubes in argon was used to change the carbon content of the samples. The influence of the carbon content in the structure of symmetrical TiO2 NTs on their photoelectrochemical properties and photocatalytic activity in the conversion of CO2 into organic fuel precursors has been studied. The structure, chemical, and phase composition of obtained samples were studied by X-ray analysis, Raman spectroscopy, and SEM with energy dispersive analysis. It is established that carbon-related defects in the samples accumulate electrons on the surface required for the CO2 conversion reaction. It has been shown for the first time that varying the carbon content in symmetric TiO2 NTs arrays by annealing at different temperatures in argon makes it possible to control the yield of methane and methanol in CO2 conversion. It is revealed that too high a concentration of carbon dangling bonds promotes the growth of CO2 conversion efficiency but causes instability in this process. The obtained results show a high promise of symmetric carbon-doped TiO2 NTs arrays for the photocatalytic conversion of CO2.

show abstract