Facilitated electron transfer by Mn dopants in 1-dimensional CdS nanorods for enhanced photocatalytic hydrogen generation

Walker MacSwain, Hanjie Lin, Zhi Jun Li, Shuya Li, Chun Chu, Lacie Dube, Ou Chen, Gyu Leem, Weiwei Zheng

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Using sunlight to produce hydrogen gas via photocatalytic water splitting is highly desirable for green energy harvesting and sustainability. In this work, Mn2+ doped 1-dimensional (1D) CdS nanorods (NRs) with Pt tips (i.e., 1D Mn:CdS-Pt NRs) were synthesized for photocatalytic water splitting to generate hydrogen gas. The incorporation of Mn2+ dopants inside the 1D CdS NRs with a significantly longer lifetime (∼ms) than that of host excitons (∼ns) facilitates charge separation; the electron transfer to metal Pt tips leads to enhanced photocatalytic activity in water splitting redox reactions. The as-synthesized Mn2+ doped CdS NR-based photocatalyst generated an order of magnitude greater yield of hydrogen gas compared to the undoped CdS NR-based photocatalyst. The enhanced charge transport from the long lifetime excited state of Mn2+ dopants in light harvesting semiconductor nanomaterials presents a new opportunity to increase the overall photocatalytic performance.

Original languageEnglish (US)
Pages (from-to)7066-7076
Number of pages11
JournalJournal of Materials Chemistry A
Volume11
Issue number13
DOIs
StatePublished - Feb 27 2023

ASJC Scopus subject areas

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

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