Urchin-like TiO2 structures decorated with lanthanide-doped Bi2S3 quantum dots to boost hydrogen photogeneration performance
Magdalena Miodyńska , Alicja Mikołajczyk , Beata Bajorowicz , Julia Zwara , Tomasz Klimczuk , Wojciech Lisowski , Grzegorz Trykowski , Henry P. Pinto , Adriana Zaleska-Medynska
AbstractThe 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.
|Journal series||Applied Catalysis B: Environmental, [Applied Catalysis B: Environmental], ISSN 0926-3373, e-ISSN 1873-3883, (N/A 200 pkt)|
|Publication size in sheets||2.3|
|ASJC Classification||; ;|
|License||Other; published final; ; with publication|
|Score||= 200.0, 20-04-2020, ArticleFromJournal|
|Publication indicators||: 2018 = 2.568; : 2018 = 14.229 (2) - 2018=12.176 (5)|
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