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Related Experiment Video

Updated: Oct 15, 2025

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Controllable conversion of shrimp shells into chitin or derived carbon material using acidic deep eutectic solvent.

Mi Feng1, Jipeng Yan1, Bin He1

  • 1Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Sciences, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Beijing 100081, China.

International Journal of Biological Macromolecules
|October 25, 2021
PubMed
Summary

This study efficiently converts shrimp shells into high-purity chitin or novel carbon materials using deep eutectic solvents. This eco-friendly method offers a sustainable alternative for waste valorization and advanced material production.

Keywords:
Carbon materialsChitinCholine chloride/p-toluenesulfonic acid monohydrate

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Area of Science:

  • Materials Science
  • Green Chemistry
  • Biotechnology

Background:

  • Waste shrimp shells are a rich source of chitin, a valuable biopolymer.
  • Current chitin extraction methods often involve harsh chemicals, leading to pollution and long processing times.
  • Developing sustainable and efficient methods for chitin and its derivatives production is crucial for waste valorization.

Purpose of the Study:

  • To develop a one-step, environmentally friendly method for converting shrimp shells into chitin or carbon materials.
  • To investigate the use of deep eutectic solvents (DES) for efficient biomass processing.
  • To explore the potential of derived carbon materials in energy storage applications.

Main Methods:

  • Utilized deep eutectic solvents composed of choline chloride (ChCl) and p-toluenesulfonic acid monohydrate (TsOH).
  • Employed a dissolution-regeneration method with temperature control to selectively produce chitin or carbon materials.
  • Characterized the obtained materials for purity, yield, and composition.

Main Results:

  • Achieved high-purity α-chitin (97.9 ± 0.1 wt%) with a yield of 59.4 ± 1.9 wt% using a specific ChCl/TsOH ratio and temperature.
  • Successfully synthesized S/N/O-doped carbon materials by adjusting temperature and using different anti-solvents.
  • Demonstrated the potential of these carbon materials for supercapacitor applications, showing specific capacitances of 24.8 and 19.3 F/g.

Conclusions:

  • Deep eutectic solvents provide a versatile and sustainable platform for converting shrimp shell waste into valuable chitin and novel carbon materials.
  • Temperature and solvent choice are critical parameters for controlling the product outcome.
  • The derived S/N/O-doped carbon materials show promise for electrochemical energy storage devices.