Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202008904
Keywords
desalination; graphene; metal-organic frameworks; solar evaporation; solar thermal conversion
Categories
Funding
- Ministry of Education, Singapore [RG11/18, RG97/19, MOE2016-T2-1-043]
- Max Planck Institute-Nanyang Technological University Joint Lab
Ask authors/readers for more resources
The study presents a novel photothermal material G@ZIF, which demonstrates high energy conversion efficiency under artificial sunlight and is applicable for various practical applications, such as steam generators and water treatment systems.
Photothermal materials are crucial for diverse heating applications, but it remains challenging to achieve high energy conversion efficiency due to the difficulty to concurrently improve light absorbance and suppress heat loss. Herein, a zeolitic imidazolate framework-isolated graphene (G@ZIF) nanohybrid is demonstrated that utilizes ultrathin, heat-insulating ZIF layers, and G@ZIF interfacial nanocavity to synergistically intensify light absorbance and heat localization. Under artificial sunlight illumination (approximate to 1 kW m(-2)), the G@ZIF film attains a maximum temperature of 120 degrees C in an open environment with a 98% solar-to-thermal conversion efficiency. Importantly, the porous ZIF layer allows small molecules/media to enter and access the embedded hot graphene surface for targeted heat transfer in practical applications. As a proof-of-concept, the G@ZIF-based steam generator realizes 96% energy conversion from light to vapor with near-perfect desalination and water purification efficiencies (>99.9%). This design is generic and can be extended to other photothermal systems for advanced solar-thermal applications, including catalysis, water treatments, sterilization, and mechanical actuation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available