Adjustable photothermal device induced by magnetic field for efficient solar‐driven desalination. Issue 5 (31st August 2021)

• Record Type: Journal Article
• Authors: Wang, Yuchao; Tang, Bo; Han, Peng; Qi, Guicun; Gao, Dali; Pu, Shengyan; Tao, Shengyang
• Is Part Of: EcoMat. Volume 3:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-31
• Subjects: desalination -- magnetic field -- solar‐driven evaporation -- spine arrays -- water purification; Materials -- Environmental aspects -- Periodicals; Clean energy -- Periodicals; 621.042
• DOI: 10.1002/eom2.12139
• Languages: English
• ISSNs: 2567-3173

Abstract

Abstract: In recent years, broad interest has arisen for solar‐driven evaporation, a promising technology for next‐generation desalination and sewage treatment. Efficient photothermal materials are the keys in solar‐driven evaporation systems, but they are usually involved in tedious preparation and easy damage. Herein, a magnet‐dominated photothermal device (MPD) with spiny surface has been developed by the direct assembly of magnetic nanoparticles in action of magnetic field. Such one‐step fabrication of photothermal layer avoids the use of harmful reagent and the consumption of pure water. The adjustable spiny morphology not only benefits to the light absorption via multiple reflection, but can facilely recover from damage. Water evaporation under solar irradiation can be accelerated by MPD to over 1.70 kg m −2 h −1, and keeps stable in a long‐term desalination. Without complex fabrication and high price, MPD could be considered as a rewarding attempt for the development of novel photothermal materials in water purification. Abstract : High‐performance photothermal device is developed based on the self‐assembly of black magnetic nanoparticles in magnetic field, which can realize a long‐term solar desalination for pure water generation. Under the action of magnetic field, photothermal layer not only forms a spiny morphology to improve the light harvesting facilely, but can recover from damage thanks to the good adjustability.