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A magnetic nanostructure PAC@Fe3O4 driven design toward Janus hydrogel achieves highly efficient solar water evaporation by Baichun Wang; Kai Yang; Bohan Cai; Jintai Zhang; Chuyun Wei; Aijiao Zhou is a Engineering article available to read on EtoBox.

What is A magnetic nanostructure PAC@Fe3O4 driven design toward Janus hydrogel achieves highly efficient solar water evaporation about?

Solar water purification is a promising scheme to relieve the energy crisis and clean water shortages. In order to improve the efficiency of producing water, it is necessary to develop a novel photothermal conversion interface to manage heat loss and boost water evaporation efficiency. Herein, a Janus hydrogel evaporator of powder active carbon (PAC) and Fe3O4 in polyvinyl alcohol (PVA) and polystyrene sulfonate (PSS) cross-link hydrogel, called CFPS, is explored as the light absorber for broadband light absorption and formed a hydrogel network of the multi-hydrophilic group. Its hydrophilic/hydrophobic structure of CFPS is used to regulate heat loss and promote water transport, which can attain lower evaporation enthalpy and a higher evaporation rate. Specifically, the surface temperature of the CFPS can reach around 45 °C and 93.4% energy utilization efficiency under 1 sun illumination. In the comparison of the analogous Fe3O4-based evaporator, CFPS has the higher static evaporation rate with 3.43 kg m–2h−1. Besides, it has great mechanical properties, durability and anti-crystallization function, which can be adapted to the water purification scene of wastewater and hypersaline

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Author

Baichun Wang; Kai Yang; Bohan Cai; Jintai Zhang; Chuyun Wei; Aijiao Zhou

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)