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Updated: Oct 6, 2025

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
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High-efficiency 2D nanosheet exfoliation by a solid suspension-improving method.

Xuewen Zheng1,2, Haifeng Cong3, Ting Yang1,2

  • 1Key Laboratory for Green Chemical Technology of MOE, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China.

Nanotechnology
|January 14, 2022
PubMed
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This summary is machine-generated.

Researchers developed a safe and efficient method to produce hexagonal boron nitride nanosheets (hBNNSs) with high yield. This solid suspension-improving technique enhances 2D material exfoliation for energy applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Two-dimensional (2D) materials like hexagonal boron nitride (hBN) offer significant potential in electronics, energy storage, and coatings.
  • Current methods for exfoliating 2D materials often suffer from low yields, high costs, and environmental concerns.

Purpose of the Study:

  • To develop a safe, efficient, and high-yield method for exfoliating hexagonal boron nitride nanosheets (hBNNSs).
  • To demonstrate the applicability of the method for other 2D materials and evaluate the performance of exfoliated hBNNSs in composite electrolytes.

Main Methods:

  • A novel solid suspension-improving method using a permeation barrier layer in a solvothermal kettle to prolong solvent-hBN contact.
  • Utilizing a matching solvent to reduce material stripping energy and a high-temperature steam shearing process.
Keywords:
boron nitrideionic conductivitylarge yieldsolid suspension-improving method

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  • Exfoliation achieved at 150 °C for 12 hours without mechanical agitation.

    • Main Results:

    • Achieved a high exfoliating yield of hBNNSs up to 42.3%.
    • Demonstrated the method's versatility for other 2D materials.
    • PEO/hBNNSs composite electrolytes exhibited an ionic conductivity of 2.18 × 10⁻⁴ S cm⁻¹ at 60 °C.

    Conclusions:

    • The proposed method offers a versatile and effective approach for 2D material exfoliation.
    • This technique provides a new, safe strategy for energy management applications.
    • The high yield and efficiency make this method suitable for large-scale production.