Synthesis and photocatalytic property of BaTi{sub 4}O{sub 9}/RuO{sub 2} nanocomposites

Graphical abstract: The photocatalytic property of the BaTi{sub 4}O{sub 9} nanobelts and bulk samples for overall water splitting into H{sub 2} and O{sub 2} under ultraviolet light irradiation. Display Omitted Highlights: ► 1D semiconductor photocatalysts have merited special attention. ► The nanoco...

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Bibliographic Details
Published in:Materials research bulletin 2013-02, Vol.48 (2)
Main Authors: Zhang, Xianke, Nanjing National Laboratory of Microstructures, Department of Physics, Nanjing University, Nanjing 210093, Tang, Shaolong, Li, Ruipu, Du, Youwei
Format: Article
Language:English
Subjects:
COMPOSITE MATERIALS
EFFICIENCY
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
IRRADIATION
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOCATALYSIS
RUTHENIUM OXIDES
SEMICONDUCTOR MATERIALS
SYNTHESIS
X-RAY DIFFRACTION
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Summary:Graphical abstract: The photocatalytic property of the BaTi{sub 4}O{sub 9} nanobelts and bulk samples for overall water splitting into H{sub 2} and O{sub 2} under ultraviolet light irradiation. Display Omitted Highlights: ► 1D semiconductor photocatalysts have merited special attention. ► The nanocomposites of BaTi{sub 4}O{sub 9} nanobelts combined with RuO{sub 2} have been synthesized. ► BaTi{sub 4}O{sub 9}/RuO{sub 2} does not exhibit higher photocatalytic activity than the bulk. ► Photocatalytic efficiency of BaTi{sub 4}O{sub 9}/RuO{sub 2} can be significantly affected by the defects. -- Abstract: Photocatalytic BaTi{sub 4}O{sub 9}/RuO{sub 2} nanocomposites have been prepared by a solution-based impregnation method for overall water splitting into H{sub 2} and O{sub 2} under ultraviolet light irradiation. Although the specific surface area of BaTi{sub 4}O{sub 9} nanobelts is far larger than that of the counterpart bulk, the nanobelts do not exhibit a much higher photocatalytic activity than the corresponding bulk. Our results suggest that the photocatalytic efficiency of nanocrystals can be significantly affected by the defects, which may further indicate the benefit from the size reduction can be canceled by a higher electron-hole recombination rate due to the defects. Furthermore, the absence of reactive facets in BaTi{sub 4}O{sub 9} nanobelts may be another reason leading to the decrease of photocatalytic efficiency of nanocrystals.
ISSN:0025-5408
1873-4227
DOI:10.1016/J.MATERRESBULL.2012.11.039