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Author Kim, Sung Phil ♦ Choi, Myong Yong ♦ Choi, Hyun Chul
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ NANOSCIENCE AND NANOTECHNOLOGY ♦ ABSORPTION SPECTROSCOPY ♦ FINE STRUCTURE ♦ HYDROXYL RADICALS ♦ METHYLENE BLUE ♦ NANOPARTICLES ♦ NANOSTRUCTURES ♦ OXIDATION ♦ PHOTOCATALYSIS ♦ POWDERS ♦ PRECIPITATION ♦ SYNTHESIS ♦ TETRAGONAL LATTICES ♦ TIN OXIDES ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ X-RAY DIFFRACTION ♦ X-RAY SPECTROSCOPY
Abstract Highlights: • Nanosized SnO{sub 2} photocatalysts were prepared with a precipitation method. • SnO{sub 2} nanoparticles displayed high photocatalytic activities for the MB degradation. • OH radicals are the main active species in photocatalysis on the SnO{sub 2} nanoparticles. - Abstract: Nanosized SnO{sub 2} photocatalysts were prepared with a precipitation method and were characterized by performing transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS). The powder XRD results revealed that the SnO{sub 2} nanoparticles have a typical tetragonal rutile (cassiterite) structure and the average crystallite size was found to be approximately 4.5 nm by using the Debye–Scherrer equation. The prepared SnO{sub 2} nanoparticles consist of agglomerated particles with a mean diameter of around 4–5 nm according to the analysis of TEM images. The XAS data confirmed that the prepared samples have cassiterite structures with tin oxidation state of +4. The prepared SnO{sub 2} nanoparticles were found to exhibit approximately 3.8 times higher activity than bulk SnO{sub 2} in the photodegradation of methylene blue. On the basis of a trapping experiment, we developed a possible mechanism for the photodegradation on SnO{sub 2} nanoparticles.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-02-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 74


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