Urchin-like TiO2 structures decorated with lanthanide-doped Bi2S3 quantum dots to boost hydrogen photogeneration performance - Publication - Bridge of Knowledge

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Urchin-like TiO2 structures decorated with lanthanide-doped Bi2S3 quantum dots to boost hydrogen photogeneration performance

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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Category:
Articles
Type:
artykuły w czasopismach
Published in:
APPLIED CATALYSIS B-ENVIRONMENTAL no. 272,
ISSN: 0926-3373
Language:
English
Publication year:
2020
Bibliographic description:
Miodynska M., Mikolajczyk A., Bajorowicz B., Zwara J., Klimczuk T., Lisowski W., Trykowski G., Pinto H., Zaleska-Medynska A.: Urchin-like TiO2 structures decorated with lanthanide-doped Bi2S3 quantum dots to boost hydrogen photogeneration performance// APPLIED CATALYSIS B-ENVIRONMENTAL -Vol. 272, (2020), s.118962-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apcatb.2020.118962
Verified by:
Gdańsk University of Technology

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