多尺度Ag/CuO复合光热材料的制备及在海水淡化中的应用

采用原位化学反应和热处理相结合的策略,在泡沫铜表面形成丝线状与花瓣状的立体无机物阵列,然后在其表面蒸镀Ag纳米颗粒(NPs),成功制备了基于泡沫铜的Ag/CuO复合光热材料。该复合材料因表面三维立体阵列结构以及Ag NPs而具备较高的太阳光吸收率。故而,Ag/CuO复合光热材料结合三聚氰胺泡沫组成的蒸发器件实现了高效的海水淡化。本研究除了探索光陷阱深度和金属掺杂对吸收体光热转换效率增强之外,还搭建了太阳能驱动界面蒸汽生成测试系统,测试了样品的光热蒸发性能。在1倍太阳(1 kW·m~(-2))辐照下,该器件整体蒸发速率高达1.097 6 kg·m~(-2)·h~(-1),即其蒸发效率可达78.38%。

Multi-scale Ag/CuO Photothermal Materials: Preparation and Application in Seawater Desalination

In-situ chemical reaction and heat treatment were used to form a wire-like and petal-shaped three-dimensional inorganic substance array on the surface of copper foam, and then Ag nanoparticles (NPs) were deposited on its surface to successfully prepare Ag/CuO composite photothermal material. The composite material has high solar light absorption capacity due to the surface three-dimensional array structure and plasmonic effect caused by Ag NPs. This material combined with melamine foam as evaporation device can achieve highly efficient seawater desalination. In addition, to study the optical trap depth and the metal doping for enhancement of the photothermal conversion efficiency, solar steam generation test system was built to investigate the photothermal evaporation performance of the sample. Under one solar (1 kW·m^-2) irradiation, evaporation rate of this device was as high as 1.097 6 kg·m^-2· h^-1, and its evaporation efficiency could reach 78.38%.