Scholarlink

<p> Atmospheric water harvesting (AWH) offers a sustainable route for freshwater generation; however, its efficiency is often limited by insufficient droplet nucleation and slow water transport. In this work, a three-dimensional hydrogel material was developed by incorporating a graphene oxide–Cr-MIL-101 (GO–MIL) composite into calcium-crosslinked alginate beads to integrate nucleation and capillary transport within a single architecture. Structural analyses (SEM, TEM, XRD, FTIR, and BET) confirmed uniform MIL-101 crystallites anchored on GO sheets and preserved framework integrity within a hierarchical porous scaffold. The composite beads exhibited a maximum water uptake of 3.14&#xa0;g·g⁻¹ at 90% relative humidity, outperforming pristine alginate and single-filler systems. Rapid regeneration was achieved, with 91% water release within 30&#xa0;min at 60&#xa0;°C and complete desorption at 80&#xa0;°C. Moreover, 94.8% of the initial sorption capacity was retained after ten adsorption–desorption cycles, demonstrating excellent durability. The enhanced performance is attributed to synergistic coupling between microporous MIL-101 for vapor adsorption and GO-facilitated water transport within the alginate network. This study presents an effective strategy for designing integrated, substrate-free materials for efficient atmospheric water harvesting.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Standalone Alginate Beads Incorporating GO–Cr-MIL-101 for Adsorption Based Atmospheric Water Harvesting

  • 期刊论文

  • 发表日期：

    2026年6月30日

查看全文
  • Gamal H. Sewify,
  • Mohamed Mokhtar M. Mostafa,
  • Reda S. Salama

摘要

Atmospheric water harvesting (AWH) offers a sustainable route for freshwater generation; however, its efficiency is often limited by insufficient droplet nucleation and slow water transport. In this work, a three-dimensional hydrogel material was developed by incorporating a graphene oxide–Cr-MIL-101 (GO–MIL) composite into calcium-crosslinked alginate beads to integrate nucleation and capillary transport within a single architecture. Structural analyses (SEM, TEM, XRD, FTIR, and BET) confirmed uniform MIL-101 crystallites anchored on GO sheets and preserved framework integrity within a hierarchical porous scaffold. The composite beads exhibited a maximum water uptake of 3.14 g·g⁻¹ at 90% relative humidity, outperforming pristine alginate and single-filler systems. Rapid regeneration was achieved, with 91% water release within 30 min at 60 °C and complete desorption at 80 °C. Moreover, 94.8% of the initial sorption capacity was retained after ten adsorption–desorption cycles, demonstrating excellent durability. The enhanced performance is attributed to synergistic coupling between microporous MIL-101 for vapor adsorption and GO-facilitated water transport within the alginate network. This study presents an effective strategy for designing integrated, substrate-free materials for efficient atmospheric water harvesting.