본문 바로가기
  • Home

Upcycling of waste masks into carbon nanotubes combined with ZIF-8 for the detection of heavy-metal ions and nitrite

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(1), pp.187~197
  • DOI : 10.1007/s42823-024-00778-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 18, 2024
  • Accepted : July 26, 2024
  • Published : March 28, 2025

Long-Yue Meng 1

1Yanbian University

Accredited

ABSTRACT

Food contamination with heavy-metal ions and nitrites poses a serious threat to human health. Consequently, the development of fast and sensitive platforms for detecting these contaminants is urgently needed. In this study, a novel sensing platform was developed by integrating carbon nanotubes generated by the pyrolysis of waste masks (WMCNTs) with ZIF-8 for the simultaneous detection of Cd2+, Pb2+, and nitrite. Specifically, the electronic structure of the WMCNT backbone was modulated by doping with B and N atoms. Nanoporous ZIF-8 was then grown in-situ on its surface to produce composites with enhanced electrical conductivities and large specific surface areas. This modification provided more active sites for the attachment of heavy-metal ions and nitrites. Under optimized conditions, the sensing platform exhibited a wide linear range with the Pb2+, Cd2+, and NO2− limits of detection of 2.68, 12.12, and 5.94 μM, respectively. Notably, the sensing platform demonstrated excellent anti-interference capabilities and effectively detected nitrites and heavy-metal ions in pickled foods.

Citation status

* References for papers published after 2023 are currently being built.