Aging dependent phase transformation of mesostructured titanium dioxide nanomaterials prepared by evaporation-induced self-assembly process: Implications for solar hydrogen production

Luther Mahoney; Shivatharsiny Rasalingam; Chia-Ming Wu; Rui Peng; Ranjit T Koodali; Luther Mahoney; Shivatharsiny Rasalingam; Chia-Ming Wu; Rui Peng; Ranjit T Koodali

doi:10.3934/matersci.2015.3.230

AIMS Materials Science

2015, Volume 2, Issue 3: 230-242. doi: 10.3934/matersci.2015.3.230

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Aging dependent phase transformation of mesostructured titanium dioxide nanomaterials prepared by evaporation-induced self-assembly process: Implications for solar hydrogen production

Department of Chemistry, University of South Dakota, Vermillion, SD-57069, USA

Received: 12 May 2015 Accepted: 11 August 2015 Published: 18 August 2015

Mesostructured titanium dioxide materials were prepared by Evaporation-Induced Self-Assembly (EISA) method using titanium isopropoxide and a cationic surfactant. The titania phase could be tuned by simply varying the aging time. As the aging time increased, hierarchically structured mesoporous materials with mixed phases of titania were obtained. The rutile content was found to generally increase with length in aging time. The mesostructured materials were evaluated for hydrogen production, and a mixed phase consisting of 95% anatase and 5% rutile showed the highest activity. This study indicates that the aging time is an important parameter for the preparation of mesostructured materials with hierarchical porosities and mixed phase(s) of titania.
- evaporation-induced self-assembly,
- titanium dioxide,
- solar hydrogen,
- porous materials,
- phase transformation
Citation: Luther Mahoney, Shivatharsiny Rasalingam, Chia-Ming Wu, Rui Peng, Ranjit T Koodali. Aging dependent phase transformation of mesostructured titanium dioxide nanomaterials prepared by evaporation-induced self-assembly process: Implications for solar hydrogen production[J]. AIMS Materials Science, 2015, 2(3): 230-242. doi: 10.3934/matersci.2015.3.230

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Abstract

Mesostructured titanium dioxide materials were prepared by Evaporation-Induced Self-Assembly (EISA) method using titanium isopropoxide and a cationic surfactant. The titania phase could be tuned by simply varying the aging time. As the aging time increased, hierarchically structured mesoporous materials with mixed phases of titania were obtained. The rutile content was found to generally increase with length in aging time. The mesostructured materials were evaluated for hydrogen production, and a mixed phase consisting of 95% anatase and 5% rutile showed the highest activity. This study indicates that the aging time is an important parameter for the preparation of mesostructured materials with hierarchical porosities and mixed phase(s) of titania.

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