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<p>Global water scarcity and aquatic pollution from microplastics and oil spills remain critical environmental challenges, requiring sustainable and multifunctional treatment materials. This study developed a new strategy to create environmentally friendly 3D cellulose aerogels, referred to as black cellulose aerogel (BCA) and black cellulose aerogel with beeswax (BCAW). These aerogels were produced using a simple, fast freeze-drying method with eco-friendly precursors. The unique 3D porous network of BCA enables strong light absorption, interfacial heat localization, and efficient water transport, resulting in a much higher evaporation rate compared to seawater under artificial light, highlighting its potential for solar steam generation. In addition, the hydrophilic cellulose framework facilitates electrostatic interaction and rapid adsorption of microplastics, achieving equilibrium within 60&#xa0;min with an adsorption capacity of 335.6&#xa0;mg·g⁻¹. Furthermore, surface modification with beeswax imparts superhydrophobicity to BCAW (water contact angle ≈ 155°), enabling efficient oil uptake with a high absorption capacity (89.6&#xa0;g·g⁻¹) and separation efficiency above 99%. Even after multiple recycling cycles, the aerogels reported in this study still maintained a strong performance, making them a promising and sustainable solution for versatile environmental applications.</p>

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Environmentally Friendly 3D Cellulose Aerogels for Solar Steam Generation and Versatile Environmental Applications

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Pham Tien Thanh,
  • Tran Thi Viet Ha

摘要

Global water scarcity and aquatic pollution from microplastics and oil spills remain critical environmental challenges, requiring sustainable and multifunctional treatment materials. This study developed a new strategy to create environmentally friendly 3D cellulose aerogels, referred to as black cellulose aerogel (BCA) and black cellulose aerogel with beeswax (BCAW). These aerogels were produced using a simple, fast freeze-drying method with eco-friendly precursors. The unique 3D porous network of BCA enables strong light absorption, interfacial heat localization, and efficient water transport, resulting in a much higher evaporation rate compared to seawater under artificial light, highlighting its potential for solar steam generation. In addition, the hydrophilic cellulose framework facilitates electrostatic interaction and rapid adsorption of microplastics, achieving equilibrium within 60 min with an adsorption capacity of 335.6 mg·g⁻¹. Furthermore, surface modification with beeswax imparts superhydrophobicity to BCAW (water contact angle ≈ 155°), enabling efficient oil uptake with a high absorption capacity (89.6 g·g⁻¹) and separation efficiency above 99%. Even after multiple recycling cycles, the aerogels reported in this study still maintained a strong performance, making them a promising and sustainable solution for versatile environmental applications.