Zhang Xiangyi, Ren Lipei, Xu Jie, Shang Bin, Liu Xin, Xu Weilin
School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China.
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430073, P. R. China.
Small. 2022 Feb;18(5):e2105198. doi: 10.1002/smll.202105198. Epub 2021 Nov 25.
Structural design of the solar-absorbing layer has been considered as one of the most direct and effective approaches for improving the solar steam generation performance by maximizing the absorption of sunlight, but great challenges in manipulation simplification and structure controllability still remain. Herein, a polyester (PET) fabric covered with a vertically aligned 3D tower-like ferrosoferric oxide (Fe O ) array via a convenient magnetically driven spray-coating method is reported, and both the spatial density and height of the Fe O array are tunable upon spraying time. It shows an extremely high solar absorbance (98.6%) in the entire solar spectrum, which is superior to the corresponding 2D Fe O structure (91.1%). Combining the obtained 3D Fe O /PET with a yolk-shell hydrophobic/superhydrophilic modified melamine-formaldehyde (mMF) sponge, the carefully designed and fabricated 3D Fe O /PET-mMF evaporator can realize a high water evaporation rate of 1.59 kg m h under 1 kW m solar illumination, outperforming most related solar steam generation systems. With the advantages of cost-effectiveness, high evaporation rate, reliable endurance, and structural controllability, this 3D structural design provides an avenue to build up high-performance solar energy-driven water steam generation systems.
通过最大化太阳光吸收来提高太阳能蒸汽发生性能，太阳能吸收层的结构设计被认为是最直接有效的方法之一，但在操作简化和结构可控性方面仍存在巨大挑战。在此，报道了一种通过便捷的磁驱动喷涂方法在聚酯（PET）织物上覆盖垂直排列的三维塔状四氧化三铁（Fe₃O₄）阵列，并且Fe₃O₄阵列的空间密度和高度在喷涂时间上是可调的。它在整个太阳光谱中显示出极高的太阳能吸收率（98.6%），优于相应的二维Fe₃O₄结构（91.1%）。将获得的三维Fe₃O₄/PET与核壳结构的疏水/超亲水改性三聚氰胺甲醛（mMF）海绵相结合，精心设计和制造的三维Fe₃O₄/PET-mMF蒸发器在1kW/m²的太阳光照下可实现1.59kg·m⁻²·h⁻¹的高水蒸发速率，优于大多数相关的太阳能蒸汽发生系统。凭借成本效益高、蒸发速率高、耐久性可靠和结构可控性等优点，这种三维结构设计为构建高性能太阳能驱动的水蒸汽发生系统提供了一条途径。
