Construction of CdS@Ti3C2@CoO hierarchical tandem p-n heterojunction for boosting photocatalytic hydrogen production in pure water

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Highly efficient and direct photocatalytic H2 evolution from water splitting is a hopeful route to convert solar energy into renewable and storable chemical energy. However, it's still a challenging task to eliminate the constraint of sacrificial agents. Herein, by integrating the architecture guidance and energy band engineering into the design conception, a novel CdS@Ti3C2@CoO hierarchical tandem p-n heterojunction photocatalytic system is designed and prepared for the first time. Ti3C2 nanosheets not only solve the compatibility problem between CdS and CoO but also function as a bridge to consolidate them into a special tandem p-n heterojunction where two secondary internal electric fields are set up and combined into the strong internal electric field existing in the p-n heterojunction. The triple-internal electric field can dramatically boost the separation efficiency of photogenerated charge carriers and realize the regulation of their spatial motion. This specific photocatalytic system exhibits superior photocatalytic performance with a H2 evolution activity of 134.46 μmol·h−1·g−1 and excellent stability without any sacrificial agents. Our work introduces a potential avenue to design efficient photocatalysts by constructing multi-hierarchical systems toward practical application in solar energy conversion.

Original languageEnglish (US)
Article number123130
JournalChemical Engineering Journal
Volume383
DOIs
StatePublished - Mar 1 2020

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of China (Contract No. 51872162 , 11890700 ) and the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract No. ZR2017ZB0317 , ZR2018MEM013 ).

Funding Information:
This work is supported by the National Natural Science Foundation of China (Contract No. 51872162, 11890700) and the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract No. ZR2017ZB0317, ZR2018MEM013).

Publisher Copyright:
© 2019

Keywords

  • H evolution
  • Hierarchical tandem p-n heterojunction
  • Spatial motion
  • Triple-internal electric field

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Construction of CdS@Ti3C2@CoO hierarchical tandem p-n heterojunction for boosting photocatalytic hydrogen production in pure water'. Together they form a unique fingerprint.

Cite this