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Mesoporous titanium dioxide nanobelts: Synthesis, morphology evolution, and photocatalytic properties

Published online by Cambridge University Press:  30 May 2012

Chaohong Liu  and
Xin Wang
Chaohong Liu
Affiliation:
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China
Xin Wang*
Affiliation:
Institute of Material Science and Engineering, Ocean University of China, Qingdao 266100, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Mesoporous titanium dioxide (TiO2) and lithium (Li)-doped TiO2 nanobelts were synthesized via a facile solvothermal process. The crystalline structure and morphology of the nanobelts were characterized in detail. The x-ray diffraction patterns, transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) images indicate that the nanobelts have uniform monoclinic geometry with a length of 3–4 μm and a width of 40–200 nm, the pores are also uniform with 5–7 nm in diameter. scanning electron microscopy and TEM studies demonstrate the as-prepared TiO2 nanobelts have varied morphologies that strongly depend on the volume ratio of the reaction medium and the pressure. Ultraviolet-visible diffuse reflectance spectroscopy was used to study the photocatalytic degradation of Malachite green over the lithium nanoparticle-loaded mesoporous TiO2 nanobelts. The doping of lithium does not change the crystalline phase but the results form infrared spectrums confirm that the Li+ ion incorporates into the lattice of TiO2 nanobelts, decomposes it by replacing Ti4+ and thus reduces the photocatalytic activity.

Keywords

MorphologyMicrostructureDopant
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 17: Focus Issue: Oxide Semiconductors , 14 September 2012 , pp. 2265 - 2270
Copyright
Copyright © Materials Research Society 2012

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