Lei Zhiwei, Sun Xuantong, Zhu Shifeng, Dong Kai, Liu Xuqing, Wang Lili, Zhang Xiansheng, Qu Lijun, Zhang Xueji
College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Research Center for Intelligent and Wearable Technology, Intelligent Wearable Engineering Research Center of Qingdao, Qingdao University, Qingdao, 266071, People's Republic of China.
Department of Materials, University of Manchester, Manchester, M13 9PL, UK.
Nanomicro Lett. 2021 Dec 4;14(1):10. doi: 10.1007/s40820-021-00748-7.
The 3D honeycomb-like fabric decorated with MXene is woven as solar evaporator. The honeycomb structure enables light-trapping and recycling of convective and radiative heat. The 3D honeycomb-fabric evaporator possesses high solar efficiency up to 93.5% under 1 sun irradiation and excellent salt harvesting ability.
Solar steam generation technology has emerged as a promising approach for seawater desalination, wastewater purification, etc. However, simultaneously achieving superior light absorption, thermal management, and salt harvesting in an evaporator remains challenging. Here, inspired by nature, a 3D honeycomb-like fabric decorated with hydrophilic TiCT (MXene) is innovatively designed and successfully woven as solar evaporator. The honeycomb structure with periodically concave arrays creates the maximum level of light-trapping by multiple scattering and omnidirectional light absorption, synergistically cooperating with light absorbance of MXene. The minimum thermal loss is available by constructing the localized photothermal generation, contributed by a thermal-insulating barrier connected with 1D water path, and the concave structure of efficiently recycling convective and radiative heat loss. The evaporator demonstrates high solar efficiency of up to 93.5% and evaporation rate of 1.62 kg m h under one sun irradiation. Moreover, assisted by a 1D water path in the center, the salt solution transporting in the evaporator generates a radial concentration gradient from the center to the edge so that the salt is crystallized at the edge even in 21% brine, enabling the complete separation of water/solute and efficient salt harvesting. This research provides a large-scale manufacturing route of high-performance solar steam generator. [Image: see text]
The online version contains supplementary material available at 10.1007/s40820-021-00748-7.
用MXene装饰的三维蜂窝状织物被编织成太阳能蒸发器。蜂窝结构能够实现光捕获以及对流热和辐射热的循环利用。这种三维蜂窝织物蒸发器在1个太阳辐射下具有高达93.5%的高太阳能效率和出色的盐分收集能力。
太阳能蒸汽产生技术已成为海水淡化、废水净化等领域一种很有前景的方法。然而，在蒸发器中同时实现卓越的光吸收、热管理和盐分收集仍然具有挑战性。在此，受自然启发，一种用亲水性TiCT（MXene）装饰的三维蜂窝状织物被创新性地设计并成功编织成太阳能蒸发器。具有周期性凹阵列的蜂窝结构通过多次散射和全向光吸收实现了最大程度的光捕获，与MXene的光吸收率协同作用。通过构建局部光热产生可实现最小的热损失，这由与一维水路相连的隔热屏障以及有效循环对流和辐射热损失的凹结构促成。该蒸发器在1个太阳辐射下展示出高达93.5%的高太阳能效率和1.62 kg m⁻² h⁻¹的蒸发速率。此外，在中心一维水路的辅助下，蒸发器中传输的盐溶液从中心到边缘产生径向浓度梯度，使得即使在21%的盐水中盐也能在边缘结晶，从而实现水/溶质的完全分离和高效的盐分收集。本研究提供了一种高性能太阳能蒸汽发生器的大规模制造路线。[图片：见正文]
在线版本包含可在10.1007/s40820-021-00748-7获取的补充材料。
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