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Journal of Materials Science
Erschienen in: Journal of Materials Science 7/2020

11.11.2019 | Energy materials

LSPR-excited obvious hydrogen yield enhancement for TiO2:Er3+, Yb3+@W18O49 quasi-core/shell heterostructure

verfasst von: Xuesong Xu, Guoqiang Fang, Jingyu Shang, Kuichao Liu, Yanan Bao, Yang Yang, Yang Liu, Bin Dong

Erschienen in: Journal of Materials Science | Ausgabe 7/2020

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Abstract

A favorable process that utilizing upconversion (UC) luminescence to enhance the photocatalytic property for H2 evolution is designed. In this work, TiO2:Er3+, Yb3+ nanosheets (NTs) are synthesized through facile solvothermal method. With a 980-nm laser excitation, the UC luminescence bands at about 522, 546 and 625 nm separately corresponding to the energy-level transitions of 2H11/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 are detected in TiO2:Er3+, Yb3+ NTs, which coincide with the absorption band of W18O49 nano-urchins (NUs). It is worth noting that a quasi-core/shell heterostructure (QCSH) of TiO2:Er3+, Yb3+@W18O49 is designed and prepared as a photocatalyst on account of localized surface plasmon resonance action of W18O49. Photocurrent tests show TiO2:Er3+, Yb3+@W18O49 QCSHs possess outstanding charge separation ability comparing with W18O49 NUs and TiO2:Er3+, Yb3+ NTs under irradiation of 980-nm laser. Therefore, we probe photocatalytic property of H2 evolution from ammonia borane (BH3NH3). The H2 yield of TiO2:Er3+, Yb3+@W18O49 QCSHs suggests 2.5 times, 8.9 times and 26.6 times improved than that of W18O49 NUs, TiO2:Er3+, Yb3+ NTs and BH3NH3 separately. Furthermore, the focused natural sunlight is employed as excitation source, TiO2:Er3+, Yb3+@W18O49 QCSHs exhibits 1.7 times, 2.7 times and 157 times higher H2 production than that of W18O49 NUs, TiO2:Er3+, Yb3+ NTs and BH3NH3, which offers a novel method for photocatalytic H2 production and solving energy issues.
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Metadaten
Titel
LSPR-excited obvious hydrogen yield enhancement for TiO2:Er3+, Yb3+@W18O49 quasi-core/shell heterostructure
verfasst von
Xuesong Xu
Guoqiang Fang
Jingyu Shang
Kuichao Liu
Yanan Bao
Yang Yang
Yang Liu
Bin Dong
Publikationsdatum
11.11.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 7/2020
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-019-04168-2

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