Sandwich-structured MXene@Au/polydopamine nanosheets with excellent photothermal-enhancing catalytic activity

Guanghui Liu, Qingshan Xiong, Yunqi Xu, Qunling Fang*, Ken Cham Fai Leung, Min Sang, Shouhu Xuan*, Lingyun Hao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Local surface plasmon resonance (LSPR) of noble metal nanoparticles plays a significant role in nanocatalysis via directly harvesting optical energy from resonant light. However, the photothermally-assistant catalytic application is limited due to the narrow visible/infrared absorption range and low photothermal conversion efficiency. Herein, a sandwich-structured MXene@Au/Polydopamine (PDA) nanosheet with good hydrophilicity, large specific surface area and tri-photothermal components is developed for nanocatalysis. The Au/PDA hybrid shells are covered on the MXene nanosheets via a simple one-step redox-oxidize polymerization method. As a result, the catalytic dynamic of MXene@Au/PDA nanosheets on reducing 4-nitrophenol reaches to 0.28 min−1·mg−1, which is about 2 times larger than that of the nanocatalysts without NIR light irradiation. Owing to the well protection of PDA shell, after 10 cycles of reduction of 4-nitrophenol, MXene@Au/PDA nanosheets still maintain more than 90% activity. This work in depth insights into NIR light-assistant avenue to enhance the catalytic activity of noble metal nanocatalysts and highlights an easy synthetic model for heterogeneous catalysts based on MXene nanocomposites.

Original languageEnglish
Article number127860
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume633, Part 2
DOIs
Publication statusPublished - 20 Jan 2022

Scopus Subject Areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

User-Defined Keywords

  • Au
  • MXene
  • Nanocatalysts
  • Photothermal
  • Polydopamine

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