Formation and photoelectrochemical properties of TiO2 nanotube arrays in fluorinated organic electrolyte
DOI:
https://doi.org/10.15282/jmes.11.4.2017.15.0281Keywords:
Anodisation; glycerol; TiO2 nanotubes.Abstract
Titanium oxide (TiO2) nanotubes (TNTs) have been successfully formed by anodisation of pure Titanium (Ti) foil in an electrolyte consisting of 85 % glycerol with varying amount of NH4F. Organic electrolyte was used to produce longer nanotubes with higher energy conversion efficiencies during photoelectrochemical. The effect of NH4F and time for TNTs formation during anodisation was studied. The optimised amount of NH4F was 0.7 g and anodisation time required for a complete dissolution was more than 15 min. This condition will produce adequate surface etching and inwards growth to occur. The comparison of photocurrent density between irregular and well organised TNTs was investigated. Photocurrent density enhancement was also observed. TNTs photocurrent density was 60% higher as compared to nanoporous TiO2. The photoelectrochemical response of the TNTs photoelectrode was studied by using 1 M KOH solution under Xe lamp illumination.
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