A CoP/CdS/WS2 p-n-n tandem heterostructure: A novel photocatalyst for hydrogen evolution without using sacrificial agents

Yueyao Zhong, Yongzhong Wu, Bin Chang, Zizheng Ai, Kang Zhang, Yongliang Shao, Lei Zhang, Xiaopeng Hao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

In this work, a photocatalyst with a built-in p-n-n tandem heterostructure is designed and fabricated by combining CdS with n-type WS2 nanosheets and p-type CoP nanoparticles. The p-n-n tandem heterostructure allows different favorable properties from each participating compound to be combined, prolonging the lifetimes of photogenerated electrons, providing surface redox sites and increasing the photostability. Photocatalytic hydrogen evolution activity of CoP/CdS/WS2 without using sacrificial agents is measured to be 9.16 μmol g-1 h-1. Moreover, it can be used as a bifunctional photocatalyst for degrading pollutants and producing hydrogen at the same time (43.51 μmol g-1 h-1). This work opens a new way for designing efficient photocatalysts without using sacrificial agents and combining energy conversion with environmental remediation effectively.

Original languageEnglish (US)
Pages (from-to)14638-14645
Number of pages8
JournalJOURNAL OF MATERIALS CHEMISTRY A
Volume7
Issue number24
DOIs
StatePublished - 2019

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Contract 51572153, 51602177), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317), and the Natural Science Foundation of Shandong Province (Grant no. ZR2014HM023).

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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