Journal article
A cationic radical metal-organic framework enabling low water evaporation enthalpy and high photothermal conversion efficiency for solar-driven water purification
Journal of materials chemistry. A, Materials for energy and sustainability, Vol.12(21), pp.12592-12598
05/28/2024
Abstract
Solar vapor generation is a promising and sustainable strategy to purify seawater and contaminated water sources. However, achieving efficient integration between solar energy capture and desalination remains a critical challenge. In this context, we have developed an innovative solar evaporator that integrates Cu foam and a hierarchical cationic radical MOF (PFC-771) photothermal absorber component for the rapid and efficient solar energy-driven water evaporation. The highly ordered arrangement guarantees an adequate shielding effect to protect radicals from bleaching; therefore, PFC-771 exhibits outstanding stability in various solvents and under ambient conditions. Notably, the persistent radical characteristic of PFC-771 broadens its light absorption spectrum, enhancing sunlight absorption and photothermal conversion efficiency. Additionally, the excellent hydrophilic hierarchical pore structure of the PFC-771/Cu film and the ionic framework significantly lowered the evaporation enthalpy from 2430 kJ kg-1 to 1724 kJ kg-1, resulting in a fast water evaporation rate of 1.33 kg m-2 h-1 under 1 sun illumination. The design principle of integrating radical linkers in ionic MOFs not only improves photothermal efficiency but also addresses critical challenges in solar-driven desalination. This work paves the way for future advancements in designing low-enthalpy, high-performance water evaporators, highlighting the pivotal role of MOFs in a sustainable water purification solution.
An innovative solar evaporator, combining Cu foam with a cationic radical MOF (PFC-771) as the photothermal absorber, demonstrates rapid and efficient solar energy-driven water evaporation.
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- Title
- A cationic radical metal-organic framework enabling low water evaporation enthalpy and high photothermal conversion efficiency for solar-driven water purification
- Creators
- Zi-Yu Wang - Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350108, Fujian, Peoples R ChinaRui Wang - Fujian Institute of Research on the Structure of MatterHannah M. Johnson - Washington State UniversityLei Cai - Fujian Institute of Research on the Structure of MatterAn-An Zhang - Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350108, Fujian, Peoples R ChinaQiang Zhang - Washington State University, Department of ChemistryTian-Fu Liu
- Publication Details
- Journal of materials chemistry. A, Materials for energy and sustainability, Vol.12(21), pp.12592-12598
- Academic Unit
- Department of Chemistry
- Publisher
- Royal Soc Chemistry
- Number of pages
- 7
- Grant note
- 22071246 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) Washington State University JCTD-2022-12 / National Natural Science Foundation of China (NSFC) Chinese Academy of Sciences (CAS) youth interdisciplinary team; Chinese Academy of Sciences
- Identifiers
- 99901181541001842
- Language
- English
- Resource Type
- Journal article