Zhu Jingbo, Chen Xuelong, Zhang Caiyan, Cui Baozheng, Bai Ningjing, Wang Wei, Wang Huixin, Kang Chenlong, Tang Youmao, Li Zewen, Niu Haijun, Wang Zhe
Department of Macromolecular Materials and Engineering, School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, People's Republic of China.
Atera Water Private Limited, 1 Corporation Drive, Singapore 619775, Singapore.
Langmuir. 2024 May 28;40(21):11317-11328. doi: 10.1021/acs.langmuir.4c01223. Epub 2024 May 15.
Interfacial solar steam generation (ISSG) has recently received much attention as a low-carbon-footprint and high-energy-efficient strategy for seawater desalination and wastewater treatment. However, achieving the goals of a high evaporation rate, ecofriendliness, and high tolerance to salt ions in brine remains a bottleneck. Herein, a novel hydrogel-based evaporator for effective solar desalination was synthesized on the basis of sodium alginate (SA) and carboxymethyl chitosan (CMCS) incorporating a carbon nanotube (CNT)-wrapped melamine sponge (MS) through a simple dipping-drying-cross-linking process. The hydrogel-based evaporator reaches a high evaporation rate of 2.18 kg m h in 3.5 wt % brine under 1 sun irradiation. Furthermore, it demonstrated excellent salt ion rejection in high-concentration salt water. Simultaneously, it exhibits excellent purification functionality toward heavy metals and organic dyes. This study provides a simple and efficient strategy for seawater desalination and wastewater treatment.
界面太阳能蒸汽发生（ISSG）作为一种用于海水淡化和废水处理的低碳足迹和高能效策略，最近受到了广泛关注。然而，实现高蒸发速率、生态友好以及对卤水中盐离子的高耐受性等目标仍然是一个瓶颈。在此，通过简单的浸渍-干燥-交联过程，基于海藻酸钠（SA）和羧甲基壳聚糖（CMCS）合成了一种新型的基于水凝胶的蒸发器，该蒸发器包含碳纳米管（CNT）包裹的三聚氰胺海绵（MS），用于有效的太阳能海水淡化。在1个太阳光照下，该基于水凝胶的蒸发器在3.5 wt%的卤水中达到了2.18 kg m⁻² h⁻¹的高蒸发速率。此外，它在高浓度盐水中表现出优异的盐离子截留性能。同时，它对重金属和有机染料具有优异的净化功能。本研究为海水淡化和废水处理提供了一种简单有效的策略。
