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<p>Solar-driven atmospheric water harvesting (SAWH) holds significant promise for decentralized water supply. However, its widespread application is hindered by two critical limitations: underutilization of high-humidity adsorption windows during nighttime and insufficient desorption during daytime due to the high desorption temperature requirement of conventional sorbents. To overcome these challenges, this study proposes a composite sorbent strategy by synergistically combining the low enthalpy of vaporization of LiCl with the robust adsorption capacity and stability of a metal‒organic framework (MOF, specifically Ni<sub>2</sub>Cl<sub>2</sub>(BTDD),&#xa0;H<sub>2</sub>BTDD = bis(1<i>H</i>−1,2,3-triazolo[4,5-<i>b</i>],[4′,5′-<i>i</i>])dibenzo[1,4]dioxin). This design leverages the complementary properties to achieve lower desorption temperatures (<i>e.g</i>., &lt; 60 <sup>o</sup>C in device level) compared to typical MOF-based systems (usually &gt;90 <sup>o</sup>C in device level), thereby significantly reducing the energy consumption for desorption. Concurrently, the composite exhibits extended adsorption duration within the high-humidity window. Field validation across diverse climatic regions demonstrates the composite’s exceptional wide-range environmental stability and performance. The resulting SAWH device achieves a solar-to-water generation improvement up to 91% in a continental field test. This work presents a generalizable and effective pathway for enhancing SAWH performance through synergistic material engineering, enabling efficient water production and thermal control under varying environmental conditions.</p>

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Synergistic MOF-based composite enabling significant solar-to-water generation enhancement in climate-resilient AWH

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月28日

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  • Zhao Shao,
  • Xi Feng,
  • Primož Poredoš,
  • Boxiong Jiang,
  • Wen-Yu Su,
  • Haotian Lv,
  • Zhi-Shuo Wang,
  • Hongbin Wang,
  • Shuai Du,
  • Dong-Dong Zhou,
  • Jie-Peng Zhang,
  • Ruzhu Wang

摘要

Solar-driven atmospheric water harvesting (SAWH) holds significant promise for decentralized water supply. However, its widespread application is hindered by two critical limitations: underutilization of high-humidity adsorption windows during nighttime and insufficient desorption during daytime due to the high desorption temperature requirement of conventional sorbents. To overcome these challenges, this study proposes a composite sorbent strategy by synergistically combining the low enthalpy of vaporization of LiCl with the robust adsorption capacity and stability of a metal‒organic framework (MOF, specifically Ni2Cl2(BTDD), H2BTDD = bis(1H−1,2,3-triazolo[4,5-b],[4′,5′-i])dibenzo[1,4]dioxin). This design leverages the complementary properties to achieve lower desorption temperatures (e.g., < 60 oC in device level) compared to typical MOF-based systems (usually >90 oC in device level), thereby significantly reducing the energy consumption for desorption. Concurrently, the composite exhibits extended adsorption duration within the high-humidity window. Field validation across diverse climatic regions demonstrates the composite’s exceptional wide-range environmental stability and performance. The resulting SAWH device achieves a solar-to-water generation improvement up to 91% in a continental field test. This work presents a generalizable and effective pathway for enhancing SAWH performance through synergistic material engineering, enabling efficient water production and thermal control under varying environmental conditions.