MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Research Center of Biomass Clean Utilization, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Research Center of Biomass Clean Utilization, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
J Colloid Interface Sci. 2023 Sep;645:306-318. doi: 10.1016/j.jcis.2023.04.081. Epub 2023 Apr 25.
Interfacial solar steam generation (ISSG) is considered to be an attractive technique to address the water shortage. However, developing a sustainable thermal management, salt rejection, and excellent mechanical strength ISSG device for long-term stability desalination is still a challenge. Herein, a biomass ISSG device with superb mechanical properties was prepared by introducing a luffa sponge as the skeleton and constructing the MXene/cellulose nanofibers (CNFs) aerogels via freeze-drying. The Janus MXene-decorated CNFs/luffa (JMCL) aerogels integrated the multifunction of fast water transport, good thermal management, and efficient photothermal conversion in a single module, to achieve high-efficiency desalination. 3D Janus structure endowed the JMCL aerogel with opposite wettability, which is feasible to construct the localized photothermal generation and self-floating. The mechanical strength of JMCL aerogels is 437 times that of MXene/CNFs aerogels. The JMCL aerogels delivered a water evaporation rate of 1.40 kg mh and an efficiency of 91.20% under 1 sun illumination. The excellent salt resistance during 24 h working and long-term solar vapor generation of up to 28 days were achieved. The multifunctional JMCL aerogels with 3D Janus structure offer new insights for developing good durability and eco-friendly biopolymer-based steam generators.
界面太阳能蒸汽产生（ISSG）被认为是解决水资源短缺的一种有吸引力的技术。然而，开发一种可持续的热管理、盐排斥和优异机械强度的 ISSG 装置，以实现长期稳定的海水淡化仍然是一个挑战。在此，通过冷冻干燥制备了具有优异机械性能的生物质 ISSG 装置，该装置以丝瓜络作为骨架，并构建了 MXene/纤维素纳米纤维（CNFs）气凝胶。Janus MXene 修饰的 CNFs/丝瓜络（JMCL）气凝胶集成了快速水传输、良好的热管理和高效光热转换的多功能性，以实现高效脱盐。3D Janus 结构赋予了 JMCL 气凝胶相反的润湿性，这有利于构建局部光热产生和自浮。JMCL 气凝胶的机械强度是 MXene/CNFs 气凝胶的 437 倍。在 1 个太阳光照下，JMCL 气凝胶的水蒸发速率为 1.40 kg m h，效率为 91.20%。在 24 小时工作期间表现出优异的耐盐性，并实现了长达 28 天的长期太阳能蒸汽产生。具有 3D Janus 结构的多功能 JMCL 气凝胶为开发耐用性好且环保的生物聚合物基蒸汽发生器提供了新的思路。
