Photocatalytic activity of SnO{sub 2} nanoparticles in methylene blue degradation

Journal Article · Mon Feb 15 04:00:00 EST 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.10.024· OSTI ID:22584289

Kim, Sung Phil ^[1]

---

1. Department of Chemistry, Chonnam National University, Gwangju 500-757 (Korea, Republic of)

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.

• OSTI ID: 22584289
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 74; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 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