Portable Low-Pressure Solar Steaming-Collection Unisystem with Polypyrrole Origamis
Portable Low-Pressure Solar Steaming-Collection Unisystem with Polypyrrole Origamis
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DOI：
10.1002/adma.201900720
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发表时间：
2019-07-01
影响因子：
29.4
通讯作者：
Fan, Donglei Emma
中科院分区：
文献类型：
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作者：
Li, Weigu;Li, Zheng;Fan, Donglei Emma
太阳能蒸汽作为一种有前途的绿色技术，可以解决全球清洁水资源短缺的问题。然而，开发高性能、低成本、可制造的太阳能蒸汽材料和个人便携式太阳能蒸汽收集系统仍然是一个巨大的挑战。在这里，一个一步，低成本，和大规模生产的合成聚吡咯（PPy）折纸为基础的光热材料，和原始的便携式低压控制的太阳能蒸汽收集unispenser，提供协同高速率的水蒸发和蒸汽收集，报告。由于增加了蒸汽消散面积，PPy折纸的水分蒸发率比平面结构提高了至少71%，达到2.12 kg m（-2）h（-1），并在1个太阳下表现出91.5%的太阳能-热能转换效率。当进一步控制蒸汽收集单元中的压力接近0.17大气压时，水收集率系统地且显著地提高高达52%。虽然部分能量被用于获得低压，但评估表明，与环境压力相比，低压系统的总体能量效率显著提高。此外，该设备还能有效去除重金属、细菌和海水淡化。这项工作可以激发新的范式，为个人和家庭开发高性能的太阳能蒸汽技术。
Solar steaming has emerged as a promising green technology that can address the global issue of scarcity of clean water. However, developing high-performance, cost-effective, and manufacturable solar-steaming materials, and portable solar steaming-collection systems for individuals remains a great challenge. Here, a one-step, low-cost, and mass-producible synthesis of polypyrrole (PPy) origami-based photothermal materials, and an original portable low-pressure controlled solar steaming-collection unisystem, offering synergetic high rates in both water evaporation and steam collection, are reported. Due to enhanced areas for vapor dissipation, the PPy origami improves the water evaporation rate by at least 71% to 2.12 kg m(-2) h(-1) from that of a planar structure and exhibits a solar-thermal energy conversion efficiency of 91.5% under 1 Sun. When further controlling the pressure to approximate to 0.17 atm in the steaming-collection unisystem, the water collection rate improves by up to 52% systematically and dramatically. Although partial energy is utilized toward obtaining low-pressure, evaluations show that the overall energy efficiency is improved remarkably in the low-pressure system compared to that in ambient pressure. Furthermore, the device demonstrates effective decontamination of heavy metals, bacteria, and desalination. This work can inspire new paradigms toward developing high-performance solar steaming technologies for individuals and households.