Ultra-thin anatase TiO2 nanosheets dominated with {001} facets: thickness-controlled synthesis, growth mechanism and water-splitting properties

Ultra-thin anatase TiO2 nanosheets with dominant {001} facets ([similar]82%) and controllable thickness (1.6-2.7 nm) were synthesized by using a modified one-pot hydrothermal route. As a morphology controlling agent, the concentration of hydrofluoric acid has a significant impact on the thickness of...

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Bibliographic Details
Published in:CrystEngComm 2011-01, Vol.13 (5), p.1378-1383
Main Authors: Yang, Xiao Hua, Li, Zhen, Liu, Gang, Xing, Jun, Sun, Chenghua, Yang, Hua Gui, Li, Chunzhong
Format: Article
Language:English
Subjects:
Anatase
Evolution
Methyl alcohol
Nanocomposites
Nanomaterials
Nanostructure
Titanium dioxide
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Summary:Ultra-thin anatase TiO2 nanosheets with dominant {001} facets ([similar]82%) and controllable thickness (1.6-2.7 nm) were synthesized by using a modified one-pot hydrothermal route. As a morphology controlling agent, the concentration of hydrofluoric acid has a significant impact on the thickness of the as-synthesized TiO2 nanosheets. In addition, according to the XRD patterns and TEM images of the products on different reaction stages, the growth process of TiO2 nanosheets was clarified for the first time. We further measured the efficiency for H2 evolution of the ultra-thin anatase TiO2 nanosheets loaded with 1 wt% Pt from photochemical reduction of water in the presence of methanol as a scavenger. The TiO2 nanosheets exhibited a H2 evolution rate as high as 7381 [small mu ]mol h-1 g-1 under UV-vis light irradiation, attributing to their exposed reactive {001} facets and high crystallinity.
ISSN:1466-8033
1466-8033
DOI:10.1039/C0CE00233J