Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology , Beijng 100081, P. R. China.
ACS Nano. 2017 May 23;11(5):5087-5093. doi: 10.1021/acsnano.7b01965. Epub 2017 Apr 28.
Efficient utilization of solar energy for clean water is an attractive, renewable, and environment friendly way to solve the long-standing water crisis. For this task, we prepared the long-range vertically aligned graphene sheets membrane (VA-GSM) as the highly efficient solar thermal converter for generation of clean water. The VA-GSM was prepared by the antifreeze-assisted freezing technique we developed, which possessed the run-through channels facilitating the water transport, high light absorption capacity for excellent photothermal transduction, and the extraordinary stability in rigorous conditions. As a result, VA-GSM has achieved average water evaporation rates of 1.62 and 6.25 kg m h under 1 and 4 sun illumination with a superb solar thermal conversion efficiency of up to 86.5% and 94.2%, respectively, better than that of most carbon materials reported previously, which can efficiently produce the clean water from seawater, common wastewater, and even concentrated acid and/or alkali solutions.
高效利用太阳能来生产清洁水是一种有吸引力的、可再生的、环保的方式，可以解决长期存在的水危机。为此，我们制备了长程垂直排列的石墨烯片膜（VA-GSM），作为高效的太阳能热转换器来生成清洁水。VA-GSM 是通过我们开发的抗冻辅助冻结技术制备的，它具有贯穿通道，有利于水的传输，高的光吸收能力，具有优异的光热转换性能，以及在苛刻条件下的非凡稳定性。因此，VA-GSM 在 1 个和 4 个太阳光照下的平均水蒸发速率分别为 1.62 和 6.25 kg m h ，具有高达 86.5%和 94.2%的出色太阳能热转换效率，优于之前报道的大多数碳材料，可以有效地从海水、普通废水甚至浓酸和/或强碱溶液中生产清洁水。
