writer：ChangGao,DongdongYu,LingmeiZhu,HuijieWei,LeiZhang,MaolinZhou,TianceZhang, BoyangTian, JianhuaWang,Yo
keywords：Water harvesting
source：期刊
specific source：ACSNano2025,19,39292?39302
Issue time：2025年

Astrategyforatmosphericwaterharvestingtoaddresstheglobal

shortageoffreshwaterhasreceivedmuchmoreattentioninrecentyears.Here,

wedesignarobustmicrocellularandmicro-nanochannelphotothermalaerogel

(MMPA)foratmosphericwaterharvesting, inspiredbythexylemofconifers,

which is realizedbydirectional freeze-dryingandtheCa2+ ioncross-linking

technique.MMPAcanbedesignedbyusinghollowMIL-101(Cr), cellulose

acetate nanofibers, sodium alginate, and polypyrrole. Such a MMPA is

endowedwithawaterharvestingeffectdue tothehighspecificsurfacearea

thatresultedfrommicrocellularandmicro-nanochannelswithwatermolecule

hydrophilicsitesforcapturingmoisturefromair.TheMMPArealizesawater

uptakecapacity,e.g.,～0.73gg?1at40%relativehumidity(RH).MMPAcanbe

increasedto～85°Cafter5minunder1sun(1kWm?2) illuminationfora

waterreleaseeffect, e.g.,waterreleasereaches～75%under1sunirradiation

for40min.MMPAcankeepthestabilityofwateruptake?releaseover50cycles. In1dayoutdoors, thetotalwateruptake

achievesupto～7.84Lkg?1day?1,alongwiththe9cyclesofuptake?release,accordingly,achievingawaterharvestingability

of～5.49Lkg?1day?1undernatural light irradiation.Thisstudyoffersaninsight intothedesignofmaterials,whichcanbe

extendedforwaterharvestingapplications.

https://doi.org/10.1021/acsnano.5c13149