The formation of heterojunctions between wide- and narrow-bandgap photocatalysts is commonly employed to boost the efficiency of photocatalytic hydrogen generation. Herein, the photoactivity of urchin-like rutile particles is increased by decorating with pristine as well as Er- or Yb-doped Bi2S3 quantum dots (QDs) at varied QD loadings (1–20 wt%) and doping degrees (1–15 mol%), and the best hydrogen evolution performance is achieved at Er and Yb contents of 10 mol%. Specifically, a hydrogen productivity of 1576.7 μmol gcat −1 is achieved after 20-h irradiation for TiO2 decorated by 10 mol% Yb-doped Bi2S3 QDs. Theoretical calculations show that the introduction of defects into the Bi2S3 lattice through Er/Yb doping promotes the creation of new energy levels and facilitates the transport of photogenerated charges during photocatalysis.
Authors
- Magdalena Miodynska,
- Alicja Mikolajczyk,
- Beata Bajorowicz,
- Julia Zwara,
- prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
- dr hab. Wojciech Lisowski,
- doktor Grzegorz Trykowski,
- Henry P. Pinto,
- Prof. dr hab. inż. Adriana Zaleska-Medynska
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.apcatb.2020.118962
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2020
