Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China.
Langmuir. 2022 Nov 1;38(43):13187-13194. doi: 10.1021/acs.langmuir.2c02063. Epub 2022 Oct 18.
Interfacial solar steam generation (ISSG) is considered as an excellent seawater desalination technology because of its electricity-independent nature, low cost, and portability. However, improving the water evaporation efficiency, simplifying the fabrication process, and reducing the overall cost of the evaporator are still challenging. Here, an efficient and sustainable solar water evaporator is fabricated with carbonized ginkgo biloba leaves as the structural basis of photothermal materials. The combination of the abundant capillary channels in ginkgo leaves paired with polyacrylamide (PAM) hydrogel accelerates water transportation and solar-driven evaporation. The fabricated evaporator shows excellent photothermal conversion capability and evaporates water at 2.39 kg m h under 1 sun irradiation. In addition, the device exhibits remarkable stability in simulated seawater and can effectively realize seawater desalination or sewage treatment. As a result, the system is promising for future highly efficient solar evaporation due to its environmental protection and low cost.
界面太阳能蒸汽产生（ISSG）被认为是一种出色的海水淡化技术，因为它具有不依赖电力、成本低和便携的特点。然而，提高水蒸发效率、简化制造工艺以及降低蒸发器的总成本仍然具有挑战性。在这里，我们使用碳化银杏叶作为光热材料的结构基础，制造出了一种高效且可持续的太阳能蒸发器。银杏叶丰富的毛细管通道与聚丙烯酰胺（PAM）水凝胶相结合，加速了水的输送和太阳能驱动的蒸发。所制造的蒸发器表现出优异的光热转换能力，在 1 个太阳照射下可将水蒸发 2.39 千克每平方米每小时。此外，该装置在模拟海水中表现出显著的稳定性，可有效实现海水淡化或污水治理。因此，由于其环保和低成本，该系统有望在未来实现高效太阳能蒸发。
