Gao Zhongshuai, Li Linfan, Li Fangchao, Miao Gan, Miao Xiao, Song Yuanming, Xu Lide, Hou Zhiqiang, Ren Guina, Zhu Xiaotao
School of Environmental and Material Engineering, Yantai University, Yantai 264405, China.
Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, China.
Langmuir. 2024 Jun 18;40(24):12504-12511. doi: 10.1021/acs.langmuir.4c00929. Epub 2024 Jun 5.
Solar-driven interfacial evaporation is a very promising choice for producing clean water. Despite the considerable investigation of pure NaCl brine purification, solar-driven complex water purification, such as real-world seawater desalination as well as domestic and industrial wastewater treatment, has rarely been investigated, mainly due to its compositions being much more complicated than NaCl brine. Herein, we developed a graphene oxide/aramid nanofiber (GO/ANFs) aerogel by a freeze-drying process. The GO/ANFs aerogel combined opened porous microchannels, superhydrophilicity, anti-oil-fouling capacity, enhanced broad-spectrum light absorption (more than 92%), and good solar/heat management. These integrated properties enabled the GO/ANFs aerogel to be an advanced solar interfacial evaporator for efficient freshwater production with the characteristics of localized heat conversion, quick water transport, and salt crystallization inhibition, and the rate of steam production rate was as high as 2.25 kg m h upon exposure to 1 solar irradiation. Importantly, the high-water-vapor generation rate was maintained even under complicated conditions, including real-world seawater, dye water, emulsions, and corrosive liquid environments. Considering its promising adaptability to a wide range of environments, this work hopes to inspire the development of brine desalination, wastewater purification, clean water production, and solar energy utilization.
太阳能驱动的界面蒸发是生产清洁水的一个非常有前景的选择。尽管对纯氯化钠盐水净化进行了大量研究，但太阳能驱动的复杂水净化，如实际海水淡化以及生活和工业废水处理，却很少被研究，主要是因为其成分比氯化钠盐水复杂得多。在此，我们通过冷冻干燥工艺制备了一种氧化石墨烯/芳纶纳米纤维（GO/ANFs）气凝胶。GO/ANFs气凝胶兼具开放的多孔微通道、超亲水性、抗油污能力、增强的广谱光吸收（超过92%）以及良好的太阳能/热量管理性能。这些综合性能使GO/ANFs气凝胶成为一种先进的太阳能界面蒸发器，能够高效生产淡水，具有局部热转换、快速水传输和抑制盐结晶的特点，在1个太阳辐照下，蒸汽产生速率高达2.25 kg m⁻² h⁻¹。重要的是，即使在复杂条件下，包括实际海水、染料水、乳液和腐蚀性液体环境中，也能保持较高的水蒸气产生速率。鉴于其对广泛环境具有良好的适应性，这项工作有望推动盐水淡化、废水净化、清洁水生产和太阳能利用的发展。
