Jump to main content
Jump to site search

Issue 8, 2015
Previous Article Next Article

Disorder engineering of undoped TiO2 nanotube arrays for highly efficient solar-driven oxygen evolution

Author affiliations

Abstract

The trade-off between performance and complexity of the device manufacturing process should be balanced to enable the economic harvest of solar energy. Here, we demonstrate a conceptual, yet practical and well-regulated strategy to achieve efficient solar photocatalytic activity in TiO2 through controlled phase transformation and disorder engineering in the surface layers of TiO2 nanotubes. This approach enabled us to fine-tune the bandgap structure of undoped TiO2 according to our needs while simultaneously obtaining robust separation of photo-excited charge carriers. Introduction of specific surface defects also assisted in utilization of the visible part of sunlight to split water molecules for the production of oxygen. The strategy proposed here can serve as a guideline to overcome the practical limitation in the realization of efficient, non-toxic, chemically stable photoelectrochemical systems with high catalytic activity at neutral pH under visible illumination conditions. We also successfully incorporated TiO2 nanotube arrays (TNTAs) with free-based porphyrin affording a pathway with an overall 140% enhanced efficiency, an oxygen evolution rate of 436 μL h−1 and faradic efficiencies over 100%.

Graphical abstract: Disorder engineering of undoped TiO2 nanotube arrays for highly efficient solar-driven oxygen evolution

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Jul 2014, accepted on 12 Jan 2015 and first published on 15 Jan 2015


Article type: Paper
DOI: 10.1039/C4CP03177F
Author version
available:
Download author version (PDF)
Phys. Chem. Chem. Phys., 2015,17, 5642-5649

  •   Request permissions

    Disorder engineering of undoped TiO2 nanotube arrays for highly efficient solar-driven oxygen evolution

    M. Salari, S. H. Aboutalebi, A. Aghassi, P. Wagner, A. J. Mozer and G. G. Wallace, Phys. Chem. Chem. Phys., 2015, 17, 5642
    DOI: 10.1039/C4CP03177F

Search articles by author

Spotlight

Advertisements