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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Free-polymer controlling morphology of alpha-MoO3 nanobelts by a facile hydrothermal synthesis, their electrochemistry for hydrogen evolution reactions and optical properties

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Title
Free-polymer controlling morphology of alpha-MoO3 nanobelts by a facile hydrothermal synthesis, their electrochemistry for hydrogen evolution reactions and optical properties
Other Titles
Free-polymer controlling morphology of alpha-MoO(3) nanobelts by a facile hydrothermal synthesis, their electrochemistry for hydrogen evolution reactions and optical properties
Author
Sinaim, HathaiHam, Dong JinLee, Jae SungPhuruangrat, AnukornThongtem, SomchaiThongtem, Titipun
Keywords
Hydrothermal synthesis; alpha-MoO3 nanobelts; Hydrogen evolution reactions; Optical properties
Issue Date
2012-03
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.516, no., pp.172 - 178
Abstract
Orthorhombic molybdenum oxide (alpha-MoO3) nanobelts were successfully synthesized by the 100-180 degrees C and 2-20 h hydrothermal reactions of (NH4) 6Mo7O24 center dot 4H(2)O solutions containing 15 ml 2 M acid (HNO3, H2SO4 or HCl) with no surfactant and template adding. These products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy, and electron microscopy (EM). In the present research, the product synthesized by the 180 degrees C and 20 h hydrothermal reaction of the solution containing HNO3 was alpha-MoO3 nanobelts with >10 mu m long and <200 nm wide. Electrochemistry for hydrogen evolution reactions (HER) and optical properties of the as-synthesized alpha-MoO3 nanobelts were characterized by linear sweep voltammetry (LSV) and Tafel plot, including UV-vis and photoluminescence (PL) spectroscopy. These imply that alpha-MoO3 nanobelts show satisfied performance for HER, with the 3.75 eV direct allowed band gap (E-g) due to the charged transition of O-2p -> Mo-4d, including the emission of 437 nm wavelength at room temperature. (C) 2011 Elsevier B. V. All rights reserved
URI
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DOI
10.1016/j.jallcom.2011.12.024
ISSN
0925-8388
Appears in Collections:
ECHE_Journal Papers
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