Photocatalytic H2 evolution with a Cu2WS4 catalyst on a metal free D-Π-A organic dye-sensitized TiO2

Aslan E., Gonce M. K., Yigit M. Z., Sarilmaz A., Stathatos E., Ozel F., ...Daha Fazla

Applied Catalysis B: Environmental, cilt.210, ss.320-327, 2017 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 210
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.apcatb.2017.03.073
  • Dergi Adı: Applied Catalysis B: Environmental
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.320-327
  • Anahtar Kelimeler: Cu2WS4 catalyst, Dye sensitization, Hot-injection, Hydrogen evolution
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Hayır

Özet

A system comprising of a noble metal free Cu2WS4 catalyst and donor-π-bridge-acceptor metal-free organic dyes (MZ-341 and MZ-235) sensitized TiO2 has been reported for the photocatalytic hydrogen production using triethanolamine (TEOA) as the sacrificial reagent under visible light irradiation. Cu2WS4 nanocubes were synthesized according to hot-injection reaction technique. The structural properties of the Cu2WS4 nanocubes were examined by microscopy (HR-TEM) and XRD techniques where the formation of nanocubes (rectangular and square cubes) with average edge length to be ranged from 100 to 500 nm and tetragonal phase (I-42m) was proved respectively. It was found that MZ-341 and MZ-235 dyes sensitized TiO2 have been produced 661 μmol g−1 h−1 and 531 μmol g−1 h−1 hydrogen, respectively in TEOA solution at pH 9. When Cu2WS4, was used as a co-catalyst, hydrogen evolution by MZ-341 and MZ-235 sensitized TiO2 have been slightly increased to 1406 μmol g−1 h−1 and 943 μmol g−1 h−1, respectively.