Visible-light-driven hydrogen evolution using nitrogen-doped carbon quantum dot-implanted polymer dots as metal-free photocatalysts

Research output: Contribution to journalArticle


Given the photocatalytic properties of semiconducting polymers and carbon quantum dots (CQDs), we report a new structure for a metal-free photocatalytic system with a promising efficiency for hydrogen production through the combination of an organic semiconducting polymer (PFTBTA) and N-doped carbon quantum dots (NCQDs) covered by PS-PEGCOOH to produce heterostructured photocatalysts in the form of polymer dots (Pdots). This design could provide strong interactions between the two materials owing to the space confinement effect in nanometer-sized Pdots. Small particle size NCQDs are easy to insert inside the Pdot, which leads to an increase in the stability of the Pdot structure and enhances the hydrogen evolution rate by approximately 5-fold over that of pure PFTBTA Pdots. The photophysics and the mechanism behind the catalytic activity of our design are investigated by transient absorption measurement, demonstrating the role of NCQDs to enhance the charge separation and the photocatalytic efficiency of the PFTBTA Pdot.


  • Mohamed Hammad Elsayed
  • Jayachandran Jayakumar
  • Mohamed Abdellah
  • Tharwat Hassan Mansoure
  • Kaibo Zheng
  • Ahmed M. Elewa
  • Chih Li Chang
  • Li Yu Ting
  • Wei Cheng Lin
  • Hsiao hua Yu
  • Wen Hsin Wang
  • Chih Chia Chung
  • Ho Hsiu Chou
External organisations
  • Al-Azhar University
  • South Valley University
  • National Taiwan University
  • Technical University of Denmark
  • National Tsing Hua University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Polymer Chemistry


  • Carbon quantum dot, Hydrogen evolution, Photocatalysts, Polymer dots, Visible-light
Original languageEnglish
Article number119659
JournalApplied Catalysis B: Environmental
Publication statusPublished - 2021 Apr
Publication categoryResearch