Carbonized Tree‐Like Furry Magnolia Fruit‐Based Evaporator Replicating the Feat of Plant Transpiration. Issue 10 (13th September 2019) - Bian, Yue
Abstract: It has long been an aspirational goal to create artificial evaporators that allow omnidirectional energy absorptance, adequate water supply, and fast vapor transportation, replicating the feat of plant transpiration, to solve the global water crisis. This work reveals that magnolia fruits, as a kind of tree‐like living organism, can be outstanding 3D tree‐like evaporators through a simple carbonization process. The arterial pumping, branched diffusion, and confined evaporation are achieved by the "trunk, " "branches, " and "leaves, " respectively, of the mini tree. The mini tree possesses omnidirectional high light absorptance with minimized heat loss and gains energy from the environment. Water confined in the fruit possesses reduced vaporization enthalpy and transports quickly following the Murray's law. A record‐high vapor generation rate of 1.22 kg m −2 h −1 in dark and 3.15 kg m −2 h −1 under 1 sun illumination is achieved under the assistance of the gully‐like furry surface. The "absorption of nutrients" enables the fruit to recover valuable heavy metals as well as to produce clean water from wastewater efficiently. These findings not only reveal the hidden talent of magnolia fruits as cheap materials for vapor generation but also inspire future development of high‐performance, full‐time, and all‐weather vapor generation and water treatment devices. Abstract : Carbonized magnolia fruits can enable excellent vapor generation (1.22 kg m −2 h −1 in dark and 3.15 kg m −2 h −1 under 1‐sun illumination). The fibrous Murray evaporator provides continuous water supply, the 3D tree‐like profile possesses omnidirectional energy absorptance, the gully‐like furry surface escorts fast vapor transportation, and the water confined in the fruit mesh possesses reduced latent heat.