Hierarchical Porous Carbonized Lotus Seedpods for Highly Efficient Solar Steam Generation

Efficient Interfacial Solar Steam Generator with Controlled Macromorphology Derived from Flour via “Dough Figurine” Technology

“…Without the formation of plenty of other gases (CO 2 or H 2 ), the inner wall of the tunnel is kept thick (Figure c) . The C‐FFNC sample as an SISG sample can form localized evaporation (Figure f and inset picture), where simulated seawater can be transported naturally through its pores under the capillary force and the hydrophilic character of starch . As shown in Figure g, the IR image of the SISG device under 1 sun radiation in 1 min, the localized hot region can be obviously observed.…”

“…Recently, biomass materials with natural ubiquitous micro‐ and macrostructures, such as mushroom, lotus, cotton, wood, daikon, louts leaf, are developed as an efficient solar steam generation device by a series of simple processing, i.e., cutting, freeze drying, and high‐temperature carbonization (Figure S1, Supporting Information). Some simple treatments for biomass materials have produced unique advantages for synthetic materials (Table and Table S1, Supporting Information) .…”

“…Due to different natural mesoporous structures in natural wood, it is also used to investigate the effect of water transport and heat transfer on the evaporation efficiency. The carbonized lotus seedpods with a high evaporation efficiency (86.5% at 1 kW m −2 ) mainly relied on their unique macroscopic cone shape and hierarchical mesopores and macropore structures . Moldy bread, carbonized by a barbecue‐like method, achieves a 71.4% evaporation efficiency in a high humidity level (70%) .…”

Harnessing Solar‐Driven Photothermal Effect toward the Water–Energy Nexus

“…[85] Inspired by this technology, many researchers used some common, abundant, and low-cost organic porous materials (e.g., foam, [67,[86][87][88] lotus seedpods, [89] wood, [64] bamboo, [90] and cotton [66] ) to readily fabricate different photothermal convertors. [85] Inspired by this technology, many researchers used some common, abundant, and low-cost organic porous materials (e.g., foam, [67,[86][87][88] lotus seedpods, [89] wood, [64] bamboo, [90] and cotton [66] ) to readily fabricate different photothermal convertors.…”

“…[65] Similarly, a cotton rod was designed as the stem of umbrella-like solar evaporator to act as 1D water supply channel. Until now, numerous 3D porous materials have been applied to efficiently pump up water into solar absorber, including cellulose fabric, [3] lotus seedpods, [89] hydrophilic poly(tetra-fluoroethylene) (PTFE) membrane, [130] cotton, [66] aerogels, [131] sponge, [132] and hydrogel. Besides, a confined 2D water pathway was designed for water supplies of solar absorber (laminated GO film) through a thin cellulose layer wrapped over the surface of a thermal insulator in 2016.…”