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<p>Superhydrophobic materials are gaining significant interest for their self-cleaning properties. Carbon quantum dots (CQDs) offer a promising avenue due to their unique nanostructure and tunable properties. However, traditional CQD synthesis methods often suffer from low yields and complex purification processes. This study presents a facile one-step hydrothermal synthesis of superhydrophobic carbon quantum dots (SCQDs) using dithiobenzoic acid and melamine, with an eco-friendly hydrophobic passivating agent. This approach yields SCQDs with a production yield exceeding 80% and a scalable purification technique involving solvent-induced precipitation and microfiltration. The synthesized SCQDs exhibit crystalline carbon cores of 2–8&#xa0;nm, fully encapsulated by hydrophobic polymeric chains, resulting in exceptional superhydrophobic properties. Water droplets readily roll off SCQD-treated surfaces, achieving a contact angle of 163.64°. To demonstrate practical application, SCQDs were coated onto textile fabric using a simple dip-coating method with a polydimethylsiloxane (PDMS) binder. The SCQD-coated fabric exhibits self-cleaning properties, even at a 10° inclination angle, while maintaining fabric porosity. This facile and scalable approach for producing SCQDs opens up new possibilities for various self-cleaning applications, including healthcare and outdoor wearables. The exceptional durability and environmental friendliness of SCQDs make them a promising solution for sustainable and efficient self-cleaning technologies.</p>

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Green and Scalable Synthesis of Superhydrophobic Carbon Quantum Dots (S-CQDs) for Self-Cleaning Textiles

  • 期刊论文

  • 发表日期：

    2025年1月25日

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  • Esha Zainab,
  • Hui Li,
  • Doyeon Lee,
  • Aima Sameen Anjum,
  • Zubair Khaliq,
  • Muhammad Bilal Qadir,
  • Mumtaz Ali

摘要

Superhydrophobic materials are gaining significant interest for their self-cleaning properties. Carbon quantum dots (CQDs) offer a promising avenue due to their unique nanostructure and tunable properties. However, traditional CQD synthesis methods often suffer from low yields and complex purification processes. This study presents a facile one-step hydrothermal synthesis of superhydrophobic carbon quantum dots (SCQDs) using dithiobenzoic acid and melamine, with an eco-friendly hydrophobic passivating agent. This approach yields SCQDs with a production yield exceeding 80% and a scalable purification technique involving solvent-induced precipitation and microfiltration. The synthesized SCQDs exhibit crystalline carbon cores of 2–8 nm, fully encapsulated by hydrophobic polymeric chains, resulting in exceptional superhydrophobic properties. Water droplets readily roll off SCQD-treated surfaces, achieving a contact angle of 163.64°. To demonstrate practical application, SCQDs were coated onto textile fabric using a simple dip-coating method with a polydimethylsiloxane (PDMS) binder. The SCQD-coated fabric exhibits self-cleaning properties, even at a 10° inclination angle, while maintaining fabric porosity. This facile and scalable approach for producing SCQDs opens up new possibilities for various self-cleaning applications, including healthcare and outdoor wearables. The exceptional durability and environmental friendliness of SCQDs make them a promising solution for sustainable and efficient self-cleaning technologies.