One-Step Electrochemical Synthesis of Multiyolk–Shell Nanocoils for Exceptional Photocatalytic Performance

Jun Hwan Moon, Eunsoo Oh, Thomas Myeongseok Koo, Yoo Sang Jeon, Young Jun Jang, Hong En Fu, Min Jun Ko, Young Keun Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Multiyolk–shell (mYS) nanostructures have garnered significant interest in various photocatalysis applications such as water splitting and waste treatment. Nonetheless, the complexity and rigorous conditions for the synthesis have hindered their widespread implementation. This study presents a one-step electrochemical strategy for synthesizing multiyolk–shell nanocoils (mYSNC), wherein multiple cores of noble metal nanoparticles, such as Au, are embedded within the hollow coil-shaped FePO4 shell structures, mitigating the challenges posed by conventional methods. By capitalizing on the dissimilar dissolution rates of bimetallic alloy nanocoils in an electrochemically programmed solution, nanocoils of different shapes and materials, including two variations of mYSNCs are successfully fabricated. The resulting Au-FePO4 mYSNCs exhibit exceptional photocatalytic performance for environmental remediation, demonstrating up to 99% degradation of methylene blue molecules within 50 min and 95% degradation of tetracycline within 100 min under ultraviolet–visible (UV-vis) light source. This remarkable performance can be attributed to the abundant electrochemical active sites, internal voids facilitating efficient light harvesting with coil morphology, amplified localized surface plasmon resonance (LSPR) at the plasmonic nanoparticle-semiconductor interface, and effective band engineering. The innovative approach utilizing bimetallic alloys demonstrates precise geometric control and design of intricate multicomponent hybrid composites, showcasing the potential for developing versatile hollow nanomaterials for catalytic applications.

Original languageEnglish
Article number2312214
JournalAdvanced Materials
Volume36
Issue number15
DOIs
Publication statusPublished - 2024 Apr 11

Bibliographical note

Publisher Copyright:
© 2024 Wiley-VCH GmbH.

Keywords

  • Kirkendall effect
  • environmental remediation
  • galvanic replacement reaction
  • photocatalyst
  • yolk–shell nanocoil

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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