Oxygen-vacancy-modified brookite TiO2 nanorods as visible-lightresponsive photocatalysts

Title
Oxygen-vacancy-modified brookite TiO2 nanorods as visible-lightresponsive photocatalysts
Authors
박상백Seungtae Baek김동완이상욱
Issue Date
2018-12
Publisher
Materials letters
Citation
VOL 232-149
Abstract
Brookite is the least studied TiO2, and its modification for improved photocatalytic activity remains a challenge because of the difficulties encountered in obtaining its pure form. Here, we report for the first time visible-light-active brookite (BT) nanorods with a high specific surface area and a large amount of oxygen vacancies, which are synthesized via a simple, one-step, surfactant-free, wet-chemical method. The oxygen vacancies of the BT nanorods facilitate absorption of visible light, and the absorption property could be tailored by post-annealing, without any significant change in the surface area and anisotropic morphology. BT nanorods annealed at 300 degrees C show superior photocatalytic activity compared to anatase TiO2 nanoparticles and other visible-light-active photocatalysts.
URI
http://pubs.kist.re.kr/handle/201004/71256
ISSN
0167-577X
Appears in Collections:
KIST Publication > Article
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