化学工程
光电子学
光致发光
纳米技术
发光
纳米棒
作者
Magdalena Miodyńska,Alicja Mikolajczyk,Beata Bajorowicz,Julia Zwara,Tomasz Klimczuk,Wojciech Lisowski,Grzegorz Trykowski,Henry P. Pinto,Adriana Zaleska-Medynska
标识
DOI:10.1016/j.apcatb.2020.118962
摘要
Abstract 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.
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