Photocatalytic H₂ evolution on graphdiyne/g-C₃N₄ hybrid nanocomposites

Quanlong XU, Bicheng ZHU, Bei CHENG, Jiaguo YU, Minghua ZHOU, Wing Kei HO

Research output: Contribution to journalArticlespeer-review

82 Citations (Scopus)

Abstract

Hydrogen is considered an ideal alternative energy source to replace fossil energy. Herein, a novel graphdiyne (GD)/graphitic carbon nitride (g-C₃N₄) nanocomposite was successfully synthesized via a facile calcination approach, and display excellent H₂-generation performance under visible light. When the mass ratio of GD reaches 0.5 wt% in GD/g-C₃N₄ nanocomposite, it shows a maximum hydrogen evolution rate, exceeding that of g-C₃N₄ by 6.7-fold. After systematic characterization, a new C–N bond is confirmed to form between GD and g-C₃N₄ following heat treatment, and this bond serves as a charge carrier channel that facilitates the migration of photogenerated electrons from g-C₃N₄ to GD. Positive effects, such as a prolonged photogenerated charge carrier lifetime, intensified electron density, decreased reaction overpotential and improved charge carrier mobility, also contribute to the enhanced photocatalytic performance of the nanocomposites. The proposed technique provides a promising approach for modifying photocatalysts in future applications. Copyright © 2019 Elsevier B.V. All rights reserved.
Original languageEnglish
Article number117770
JournalApplied Catalysis B: Environmental
Volume255
Early online dateMay 2019
DOIs
Publication statusPublished - Oct 2019

Citation

Xu, Q., Zhu, B., Cheng, B., Yu, J., Zhou, M., & Ho, W. (2019). Photocatalytic H₂ evolution on graphdiyne/g-C₃N₄ hybrid nanocomposites. Applied Catalysis B: Environmental, 255. Retrieved from https://doi.org/10.1016/j.apcatb.2019.117770

Keywords

  • g-C₃N₄graphdiyne
  • Hydrogen generation
  • Photocatalysis

Fingerprint Dive into the research topics of 'Photocatalytic H₂ evolution on graphdiyne/g-C₃N₄ hybrid nanocomposites'. Together they form a unique fingerprint.