Structure and optical properties of Bi2S3 and Bi2O3 nanostructures synthesized via thermal evaporation and thermal oxidation routes

Title
Structure and optical properties of Bi2S3 and Bi2O3 nanostructures synthesized via thermal evaporation and thermal oxidation routes
Authors
진인주
Keywords
Bi2S3 nanorods Bi2O3 nanostructures Thermal evaporation Thermal oxidation Photoluminescence
Issue Date
2013
Publisher
CHEMICAL ENGINEERING JOURNAL
Series/Report no.
CHEMICAL ENGINEERING JOURNAL; vol.215 startpage 151 endpage 156
Abstract
Bi2S3 nanorods with diameters of a few tens of nanometers and lengths of a few to a few tens of micrometers were synthesized by thermal evaporation. Subsequently, Bi2O3 nanostructures were synthesized by thermal oxidation of the Bi2S3 nanorods. The structural evolution of the two nanomaterials and their luminescence properties were examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray spectrometry, and photoluminescence (PL) spectroscopy. The PL measurements revealed the as-synthesized Bi2S3 nanorods to have an emission band centered at 595 nm. The Bi2O3 nanorods synthesized by the thermal oxidation of Bi2S3 nanorods for 1 h showed an emission band centered at 440 nm, which is in the bluish violet region. In contrast, the Bi2O3 nanostructures synthesized by thermal oxidation of Bi2S3 nanorods for 2 or 3 h showed an emission band centered at 505 nm, in the bluish green region, and a shoulder at 380 nm. The origins of the emissions are also discussed.
URI
http://dx.doi.org/10.1016/j.cej.2012.10.102
http://dspace.inha.ac.kr/handle/10505/31893
ISSN
1385-8947
Appears in Collections:
College of Engineering(공과대학) > Polymer Science and Engineering (고분자공학) > Journal Papers, Reports(고분자공학 논문, 보고서)
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