Z-type heterojunction Pt/Zn0.2Cd0.8S/Cs3PW12O40: Mitigating photocorrosion, leveraging photochromism, and efficient photocatalytic hydrogen evolution
Xie, Liwen; Teng, Jun; Li, Taohai; Li, Feng (2024-10-19)
Xie, Liwen
Teng, Jun
Li, Taohai
Li, Feng
Elsevier
19.10.2024
Xie, L., Teng, J., Li, T., & Li, F. (2025). Z-type heterojunction Pt/Zn0.2Cd0.8S/Cs3PW12O40: Mitigating photocorrosion, leveraging photochromism, and efficient photocatalytic hydrogen evolution. Journal of Colloid and Interface Science, 679, 114–123. https://doi.org/10.1016/j.jcis.2024.10.090.
https://creativecommons.org/licenses/by/4.0/
© 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
© 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202410316538
https://urn.fi/URN:NBN:fi:oulu-202410316538
Tiivistelmä
Abstract
Catalysts are key components in the photocatalytic hydrogen precipitation process. However, commonly used catalysts such as sulfides, suffer from severe photogenerated carrier recombination and photocorrosion. To address this problem, in this work, Cs3PW12O40, polyoxometalates with reversible photochromic effect, and Zn0.2Cd0.8S with photocorrosivity are constructed to form a Z-type heterojunction to facilitate the separation of photogenerated carriers, and at the same time synergize with the unique photochromic effect of Cs3PW12O40 to mitigate photocorrosion. Moreover, by introducing the co-catalyst Pt to form a Schottky barrier, which further promotes the separation of photogenerated carriers, the Pt/Zn0.2Cd0.8S/Cs3PW12O40 Z-type heterojunction ternary composites were finally rationally designed and applied to photocatalytic hydrogen precipitation for the first time. The photocatalytic hydrogen precipitation rate of the optimal heterojunction composite was 10.4 mmol/g/h, and its apparent quantum efficiency at a single wavelength of 420 nm could reach 8.15 %. Therefore, this study provides a new strategy for alleviating the photocorrosion of sulfides and the application of polyoxometalates in photocatalytic hydrogen precipitation.
Catalysts are key components in the photocatalytic hydrogen precipitation process. However, commonly used catalysts such as sulfides, suffer from severe photogenerated carrier recombination and photocorrosion. To address this problem, in this work, Cs3PW12O40, polyoxometalates with reversible photochromic effect, and Zn0.2Cd0.8S with photocorrosivity are constructed to form a Z-type heterojunction to facilitate the separation of photogenerated carriers, and at the same time synergize with the unique photochromic effect of Cs3PW12O40 to mitigate photocorrosion. Moreover, by introducing the co-catalyst Pt to form a Schottky barrier, which further promotes the separation of photogenerated carriers, the Pt/Zn0.2Cd0.8S/Cs3PW12O40 Z-type heterojunction ternary composites were finally rationally designed and applied to photocatalytic hydrogen precipitation for the first time. The photocatalytic hydrogen precipitation rate of the optimal heterojunction composite was 10.4 mmol/g/h, and its apparent quantum efficiency at a single wavelength of 420 nm could reach 8.15 %. Therefore, this study provides a new strategy for alleviating the photocorrosion of sulfides and the application of polyoxometalates in photocatalytic hydrogen precipitation.
Kokoelmat
- Avoin saatavuus [34966]