我组王珍珍在J. Mater. Chem. A上发表论文

题目：

Robust carbon-dot-based evaporator with an enlarged evaporation area for efficient solar steam generation

作者：

Zhenzhen Wang,‡ Wenjing Tu,‡ Yajie Zhao, Hui Wang, Hui Huang, Yang Liu,* Mingwang Shao,* Bowen Yao* and Zhenhui Kang*

单位：

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials

(FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou 215123, Jiangsu, People’s Republic of China

摘要：

Solar steam generation has drawn great interest to partially remedy water crisis issues, especially in remote areas with water scarcity that have plenty of seawater (such as survival in the wild on islands surrounded by sea) by utilizing renewable solar energy to evaporate seawater. Evaporators with high evaporation rates have been widely reported recently, though efforts have rarely focused on the improvement of the mechanical properties of photo-thermal active materials with which to develop a mechanically robust and durable evaporator with high performance, thus severely limiting their widespread applications. Additionally, the effect of evaporator microstructures has not been quantitatively ****yzed, which is otherwise a necessary guideline to further boost areal evaporation performance. Herein, a robust carbon dot (CD)-based evaporator was designed from the nanometer to micrometer scale by loading nano-sized CDs onto microporous substrates, which shows a high evaporation performance of up to 2.31 kg m^-2 h^-1 (under one sun illumination) by fully capturing solar energy and extra environmental heat. While maintaining good performance, the CD-loaded evaporator shows excellent deformation tolerance derived from strong interfacial adhesion between the CDs and cellulose, meaning that it can be bent, folded, twisted, and even sonicated without obvious damage, indicating great convenience for packing and transportation. Then, contributed to by its outstanding mechanical properties, an evaporator with a 3D structure on the millimeter scale was therefore constructed through origami, which reaches a high evaporation rate of 2.93 kg m^-2 h^-1 under one sun illumination. Besides this, this evaporator can be easily manufactured at low cost without needing any sophisticated preparation procedure or strict conditions, holding promise for large-scale applications and commercialization. Finally, we propose

a theoretical model to simulate the effect of the microstructure on the performance of the solar evaporator in terms of the evaporation area, which is in accordance with the experimental results, providing quantitative insight for the structural engineering of solar evaporators in the future.

影响因子：

11.301

分区情况：

1区

链接：  

https://pubs.rsc.org/en/content/articlelanding/2020/TA/D0TA05179A