Nanoscale Optimization and Statistical Modeling of Photoelectrochemical Water Splitting Efficiency of N-Doped TiO2 Nanotubes

Tayirjan T. Isimjan, Milana Trifkovic, Inusa Abdullahi, Sohrab M F Rohani, Ajay Ray

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Highly ordered nitrogen-doped titanium dioxide (N-doped TiO2) nanotube array films with enhanced photo-electrochemical water splitting efficiency (PCE) for hydrogen generation were fabricated by electrochemical anodization, followed by annealing in a nitrogen atmosphere. Morphology, structure and composition of the N-doped TiO2 nanotube array films were investigated by FE-SEM, XPS, UV-Vis and XRD. The effect of annealing temperature, heating rate and annealing time on the morphology, structure, and photo-electrochemical property of the N-doped TiO2 nanotube array films were investigated. A design of experiments method was applied in order to minimize the number of experiments and obtain a statistical model for this system. From the modelling results, optimum values for the influential factors were obtained in order to achieve the maximum PCE. The optimized experiment resulted in 7.42 % PCE which was within 95 % confidence interval of the predicted value by the model. © 2014 Springer Science+Business Media.
Original languageEnglish (US)
Pages (from-to)114-122
Number of pages9
JournalTopics in Catalysis
Volume58
Issue number2-3
DOIs
StatePublished - Dec 19 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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