Researchers Developed New Solar Evaporator
A novel bilayer device efficiently treats hypersaline brine by shedding salt through passive mechanical action.
Updated on Sept. 28, 2026 in Energy
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Scientists have engineered a solar evaporator-crystallizer capable of processing hypersaline brines at 20 weight percent salinity. The device utilizes a nanostructured titanium mesh to achieve high evaporation rates while preventing salt crust buildup.
Why it matters
Persistent salt accumulation has long hindered the operational stability and long-term performance of solar-driven interfacial evaporation systems. This new architecture solves the clogging issue, enabling more reliable water treatment.
The evaporator maintains a net solar-driven evaporation flux of at least 1.2 kg per square meter per hour. During 12-hour illumination tests, the device effectively limited salt crust coverage to less than 10 percent.
The players
Nature
Nature is a prominent multidisciplinary scientific journal that published the peer-reviewed research findings.
The details
The device features a bilayer architecture consisting of a nanostructured titanium mesh and a photothermal b-PDMS layer. Localized top-surface light absorption and unidirectional vapor generation force salt to accumulate at the edges, where low interfacial adhesion allows for passive shedding overnight.
Timeline
12 hours was the duration of the device illumination test.
The Big Picture
This development marks a significant shift within the solar-driven interfacial evaporation research field. By overcoming the barrier of surface salt crystallization, the discovery unlocks new potential for sustainable hypersaline water treatment.
This breakthrough could lead to more efficient and cost-effective desalination technologies for industrial and agricultural use. Future commercialization may provide a sustainable way to treat highly concentrated brines without the need for constant maintenance or chemical intervention.
The takeaway
The successful implementation of low-adhesion materials could become a standard design requirement for solar evaporation systems. Readers interested in environmental engineering should watch for how this passive shedding mechanism scales in field trials.
Further reading
Learn more about the latest innovations in sustainable power through our Energy section.
More information
Read the full peer-reviewed research article for detailed methodology and data.
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