Lotus-like Ni@NiO nanoparticles embedded porous carbon derived from MOF-74/cellulose nanocrystal hybrids as solid phase microextraction coating for ultrasensitive determination of chlorobenzenes from water

J Hazard Mater. 2022 May 5:429:128384. doi: 10.1016/j.jhazmat.2022.128384. Epub 2022 Feb 1.

Abstract

Lotus-like Ni@NiO embedded porous carbons (Ni@NiO/PCs) were fabricated by pyrolysis of MOF-74/cellulose nanocrystal hybrids, and used as a solid phase microextraction (SPME) coating for ultrasensitive determination of chlorobenzenes (CBs) from water combined with gas chromatography-mass spectrometry. Owing to its abundant chemical groups, high porosity, and excellent thermal stability, the as-prepared Ni@NiO/PCs presented superior extraction performance compared to commercial SPME coatings. Notably, Ni@NiO/PCs derived from MOF-74/CNC hybrids presented higher extraction efficiencies towards CBs than that derived from pristine CNC and MOF-74 due to the formation of micro/mesopores and more abundant oxygen-containing groups. Under the optimum extraction conditions, the proposed analytical method presented wide linearity range (0.5-1500 ng L-1), ultra-low detection of limit (0.005-0.049 ng L-1), and excellent precision with relative standard deviations of 4.7-9.2% for a single fiber and 8.8-10.9% for 5 fibers, and long lifetime (≥160 times). The proposed analytical method was finally applied for determination of CBs from real water samples, and the recoveries were in the range of 93.2-116.8% towards eight CBs. This study delivered a novel and efficient sorbent as SPME coating to extraction and determination of CBs from water.

Keywords: Cellulose nanocrystal; Chlorobenzenes; Metal-organic frameworks; Porous carbon; Solid phase microextraction.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon
  • Cellulose
  • Chlorobenzenes
  • Lotus*
  • Nanoparticles* / analysis
  • Porosity
  • Solid Phase Microextraction / methods
  • Water / chemistry
  • Water Pollutants, Chemical* / analysis

Substances

  • Chlorobenzenes
  • Water Pollutants, Chemical
  • Water
  • Carbon
  • Cellulose