Li Wei, Li Xiaofeng, Liu Ji, Zeng Mei-Jiao, Feng Xinyue, Jia Xueqin, Yu Zhong-Zhen
State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China.
ACS Appl Mater Interfaces. 2021 May 19;13(19):22845-22854. doi: 10.1021/acsami.1c03388. Epub 2021 May 10.
As the global water shortage becomes increasingly serious, it is highly imperative to develop efficient, renewable, and large-scale water purification devices. Herein, an efficient solar-driven water purification device of wood coated with FeO nanoparticle-decorated carbon nanotubes (FeO/CNT) is fabricated in only a few seconds by one-step combustion of ferric acetylacetonate in an ambient environment. The thin layer of the FeO/CNT hybrid coated on the upper surface of the wood serves as a solar-light absorber for converting solar energy to thermal energy, while the thermally insulating wood layer with vertically aligned channels endows the device with rapid water upward transport and localizes the generated heat inside the FeO/CNT layer for solar-driven water evaporation. As a result, the wood/FeO/CNT device achieves a high water steam generation capability of 1.42 kg m h along with an excellent evaporation efficiency of 87.2% under 1 sun irradiation, higher than most of the wood-based solar-driven water evaporation device reported. This device is also efficient in the purification of seawaters and wastewaters. This work demonstrates a rapid and facile methodology for large-scale fabrication of wood/FeO/CNT devices for efficient solar-driven water purification.
随着全球水资源短缺日益严重，开发高效、可再生且大规模的水净化装置迫在眉睫。在此，通过在环境中一步燃烧乙酰丙酮铁，仅需几秒钟就能制备出一种涂覆有FeO纳米颗粒修饰碳纳米管（FeO/CNT）的高效太阳能驱动木材水净化装置。涂覆在木材上表面的FeO/CNT混合薄层用作太阳能吸收器，将太阳能转化为热能，而具有垂直排列通道的隔热木材层使该装置具有快速的水向上传输能力，并将产生的热量局限在FeO/CNT层内以实现太阳能驱动的水蒸发。结果，木材/FeO/CNT装置在1个太阳辐照下实现了1.42 kg m² h⁻¹的高水蒸汽产生能力以及87.2%的优异蒸发效率，高于大多数已报道的基于木材的太阳能驱动水蒸发装置。该装置在海水和废水净化方面也很高效。这项工作展示了一种快速简便的方法，用于大规模制备用于高效太阳能驱动水净化的木材/FeO/CNT装置。
