Zhang Haotian, Li Lin, Jiang Bo, Zhang Qian, Ma Jing, Tang Dawei, Song Yongchen
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China.
ACS Appl Mater Interfaces. 2020 Apr 8;12(14):16503-16511. doi: 10.1021/acsami.0c01585. Epub 2020 Mar 25.
Biomass-derived photothermal conversion materials are considered to be promising evaporator choices for cost-effective, sustainable, and environmentally friendly solar vapor generation. Herein we demonstrate a double-layer flamed straw, which is a typical solar-driven interfacial evaporator that can directly convert solar energy into heat and then localize heat at interface for vapor generation. Benefiting from the unique structure of a natural corn straw, the flamed straw exhibits a high solar absorbance of 91%, ultralow thermal conductivity (0.042 W m K), and a sufficient water supply. Notably, the flamed-straw evaporator achieves a fast evaporation rate of 1.497 kg m h and a high photothermal efficiency of 86% under 1 sun illumination, showing comparable efficiency with the reported studies. Our work highlights the promise of using the low-cost biomass-derived materials as highly effective solar vapor generators in the realm of seawater desalination and wastewater treatment.
生物质衍生的光热转换材料被认为是具有成本效益、可持续且环保的太阳能蒸汽产生蒸发器的理想选择。在此，我们展示了一种双层火焰秸秆，它是一种典型的太阳能驱动界面蒸发器，能够直接将太阳能转化为热量，然后在界面处聚集热量以产生蒸汽。得益于天然玉米秸秆的独特结构，火焰秸秆具有91%的高太阳能吸收率、超低的热导率（0.042 W m K）以及充足的供水。值得注意的是，火焰秸秆蒸发器在1个太阳光照下实现了1.497 kg m h的快速蒸发速率和86%的高光热效率，与已报道的研究相比效率相当。我们的工作突出了在海水淡化和废水处理领域使用低成本生物质衍生材料作为高效太阳能蒸汽发生器的前景。
