Single step solution combustion synthesis of hexagonal WO3 powders as visible light photocatalysts


Kaplan Ş. S., Sönmez M. Ş.

Materials Chemistry and Physics, cilt.240, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 240
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.matchemphys.2019.122152
  • Dergi Adı: Materials Chemistry and Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Hexagonal WO3, Solution combustion synthesis, Photocatalysts, Visible light, TUNGSTEN TRIOXIDE, ORGANIC-COMPOUNDS, POROUS WO3, HETEROJUNCTION, DEGRADATION, FABRICATION, DECOMPOSITION, NANOPARTICLES, OXIDES
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

© 2019 Elsevier B.V.To directly synthesise hexagonal tungsten oxide that has enhanced photocatalytic activity, we studied the solution combustion synthesis using oxalic acid as fuel. The experimental results indicated that fuel to oxidizer ratio is the key for the crystallite size of the powders which varied from 27.96 nm to 42.27 nm for the ratio of 1 and 5, respectively. Specific surface area of the WO3 powder was measured as 17.5 m2/g produced with the fuel to oxidizer ratio of 1. Photocatalytic activity of obtained powders were investigated by methylene blue degradation under sunlight. The best photocatalytic degradation efficiency was found to be 98.95% within 60 min of the initial MB concentration for the powder synthesized with fuel to oxidizer ratio of 5. The band gap energies were estimated within the range of visible light having the value of 3.65 eV and 3.47 eV. So that, as synthesized powders were suitable to be used as visible light photocatalyst for wastewater treatment.