A Rapid-Ab/Desorption and Portable Photothermal MIL-101(Cr) Nanofibrous Composite Membrane Fabricated by Spray-Electrospinning for Atmosphere Water Harvesting

Energy & Environmental Materials

article

Ailin Li¹  Jian Xiong¹  Ye Liu¹  Liming Wang¹  Xiaohong Qin¹  Jianyong Yu² 

[1] Key Laboratory of Textile Science and Technology of Ministry of Education, College of Textiles, Donghua University;Innovation Center for Textile Science and Technology, Donghua University

关键词: electrospinning;    fast vapor transport;    MIL-101(Cr);    MOF composite membrane;    solar-driven moisture harvesting;   

DOI  :  10.1002/eem2.12254

来源: Wiley

【 摘 要 】

MIL-101(Cr) is a promising moisture absorbent for solar-driven water harvesting from moisture to tackle the worldwide water shortage issue. However, the MIL-101(Cr) powder suffers from a long ab/desorption cycle due to the crystal aggregation caused by its inherent powder properties. Here, we demonstrate a MIL-101(Cr) nanofibrous composite membrane with a nanofibrous matrix where MIL-101(Cr) is monodisperse in the 3D porous nanofibrous matrix through a simple spray-electrospinning strategy. The continuous porous nanofibrous matrix not only offers sufficient sites for MIL-101(Cr) loading but also provides rapid moisture transport channels, resulting in a super-rapid ab/desorption duration of 50 min (including an absorption process for 40 min and a desorption process for 10 min) and multicycle daily water production of 15.9 L kg−1 d−1. Besides, the MIL-101(Cr) nanofibrous composite membrane establishes a high solar absorption of 92.8%, and excellent photothermal conversion with the surface temperature of 70.7 °C under one-sun irradiation. In addition, the MIL-101(Cr) nanofibrous composite membrane shows excellent potential for practical application due to its flexibility, portability, and use stability. This work provides a new perspective of shortening MOF ab/desorption duration by introducing a porous nanofibrous matrix to improve the specific water production for the solar-driven ab/desorption water harvesting technique.

【 授权许可】

Unknown