Abstract
Photoelectrochemical water splitting is a promising technology for the development of solar fuels. Titanium dioxide (TiO 2) is one of the most studied metal oxides in this field as a photoanode. Achieving its full potential requires controlling its morphology and crystallinity and especially the exposure of its most active crystal facets. Herein, we present the formation of nanostructured TiO 2 photoanodes with anatase phase and high exposure of the {0 1 0} facet, the most active TiO 2 phase and facet. TiO 2 photoanodes were prepared from a Ti 7O 4(OEt) 20 titanium oxo/alkoxy cluster solution using aerosol assisted chemical vapor deposition. Characterization techniques such as SEM and TEM reveal that these TiO 2 photoanodes consist of morphologies resembling the crystals of gypsum, sand and water found in nature, also known as desert roses. Furthermore, TEM and XRD analysis also reveals that the metastable anatase TiO 2 phase is maintained up to 1000 °C and exceeds the typical anatase-to-rutile phase-transition temperature of 500-750 °C, a feature that could be exploited in the smart ceramics industry. Photoelectrochemical measurements show that these desert-rose TiO 2 photoanodes achieve excellent photocurrent densities with an incident photon-to-current efficiency of ∼100% at 350 nm and a faradaic efficiency for oxygen evolution of ∼90%.
| Original language | English |
|---|---|
| Pages (from-to) | 19161-19172 |
| Journal | Journal of Materials Chemistry A |
| Volume | 7 |
| Issue number | 32 |
| Early online date | 29 Jul 2019 |
| DOIs | |
| Publication status | Published - 28 Aug 2019 |
ASJC Scopus subject areas
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
TiO2 photoanodes with exposed {0 1 0} facets grown by aerosol-assisted chemical vapor deposition of a titanium oxo/alkoxy cluster. / Regue Grino, Miriam; Sibby, Sandra; Ahmet, Ibbi; Friedrich, Dennis; Abdi, Fatwa F.; Johnson, Andrew; Eslava Fernandez, Salvador.
In: Journal of Materials Chemistry A, Vol. 7, No. 32, 28.08.2019, p. 19161-19172.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - TiO2 photoanodes with exposed {0 1 0} facets grown by aerosol-assisted chemical vapor deposition of a titanium oxo/alkoxy cluster
AU - Regue Grino, Miriam
AU - Sibby, Sandra
AU - Ahmet, Ibbi
AU - Friedrich, Dennis
AU - Abdi, Fatwa F.
AU - Johnson, Andrew
AU - Eslava Fernandez, Salvador
PY - 2019/8/28
Y1 - 2019/8/28
N2 - Photoelectrochemical water splitting is a promising technology for the development of solar fuels. Titanium dioxide (TiO 2) is one of the most studied metal oxides in this field as a photoanode. Achieving its full potential requires controlling its morphology and crystallinity and especially the exposure of its most active crystal facets. Herein, we present the formation of nanostructured TiO 2 photoanodes with anatase phase and high exposure of the {0 1 0} facet, the most active TiO 2 phase and facet. TiO 2 photoanodes were prepared from a Ti 7O 4(OEt) 20 titanium oxo/alkoxy cluster solution using aerosol assisted chemical vapor deposition. Characterization techniques such as SEM and TEM reveal that these TiO 2 photoanodes consist of morphologies resembling the crystals of gypsum, sand and water found in nature, also known as desert roses. Furthermore, TEM and XRD analysis also reveals that the metastable anatase TiO 2 phase is maintained up to 1000 °C and exceeds the typical anatase-to-rutile phase-transition temperature of 500-750 °C, a feature that could be exploited in the smart ceramics industry. Photoelectrochemical measurements show that these desert-rose TiO 2 photoanodes achieve excellent photocurrent densities with an incident photon-to-current efficiency of ∼100% at 350 nm and a faradaic efficiency for oxygen evolution of ∼90%.
AB - Photoelectrochemical water splitting is a promising technology for the development of solar fuels. Titanium dioxide (TiO 2) is one of the most studied metal oxides in this field as a photoanode. Achieving its full potential requires controlling its morphology and crystallinity and especially the exposure of its most active crystal facets. Herein, we present the formation of nanostructured TiO 2 photoanodes with anatase phase and high exposure of the {0 1 0} facet, the most active TiO 2 phase and facet. TiO 2 photoanodes were prepared from a Ti 7O 4(OEt) 20 titanium oxo/alkoxy cluster solution using aerosol assisted chemical vapor deposition. Characterization techniques such as SEM and TEM reveal that these TiO 2 photoanodes consist of morphologies resembling the crystals of gypsum, sand and water found in nature, also known as desert roses. Furthermore, TEM and XRD analysis also reveals that the metastable anatase TiO 2 phase is maintained up to 1000 °C and exceeds the typical anatase-to-rutile phase-transition temperature of 500-750 °C, a feature that could be exploited in the smart ceramics industry. Photoelectrochemical measurements show that these desert-rose TiO 2 photoanodes achieve excellent photocurrent densities with an incident photon-to-current efficiency of ∼100% at 350 nm and a faradaic efficiency for oxygen evolution of ∼90%.
UR - http://www.scopus.com/inward/record.url?scp=85070713003&partnerID=8YFLogxK
U2 - 10.1039/C9TA04482E
DO - 10.1039/C9TA04482E
M3 - Article
VL - 7
SP - 19161
EP - 19172
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 32
ER -