Bioinspired Unidirectional 3D Scaffold for Synergistic Enhanced Solar Evaporation and Efficient VOCs Degradation

作者：Meiqi Ye, Hanye Xing, Yang You, Yuqing Xie, Yang Liu, Wanyi Chu, Ai-Yong Zhang, Xiangsong Lin, Jingzhe Xue, Yang Lü · 发表于：Small · 年份：2025 · DOI：10.1002/smll.202501729 · 被引用次数：6 · 研究领域：Solar-Powered Water Purification Methods、Surface Modification and Superhydrophobicity、TiO2 Photocatalysis and Solar Cells

Abstract 3D design has effectively enhanced photothermal materials water evaporation performance via utilizing side surfaces. However, for photothermal/photocatalytic composite evaporators which can effectively degrade volatile organic compounds (VOCs) to prevent their contamination in condensate, introducing 3D design should promote VOCs escaping from the evaporator sides surface, reducing efficiency of VOCs photocatalytic degradation. Herein, a bioinspired unidirectional silk fibroin (SF)‐Ag 2 S/Ag 3 PO 4 3D evaporator is reported to achieve synergy between enhancing water evaporation and maintaining VOCs photocatalytic degradation efficiency. The unidirectional channels are modified with Ag 2 S/Ag 3 PO 4 composite as both photothermal and photocatalytic agents. By promoting directional water transfer, the bioinspired unidirectional scaffold achieves an evaporation rate of 2.86 kg m −2 h −1 under 1 sun with the assistance of side‐surface evaporation. Furthermore, the unidirectional channels effectively restrict the horizontal migration and the escape of VOCs from side surface, directing their transport toward the top surface, where the VOCs can be photocatalytically degraded by Ag 2 S/Ag 3 PO 4 composite. Accordingly, bioinspired SF‐Ag 2 S/Ag 3 PO 4 scaffold maintains 91.9% VOCs removal performance under 1 sun in 10 mg L −1 phenol‐contaminated water. Moreover, compared with the evaporator without directional VOCs transportation, bioinspired scaffold shows 96% and 41% increa...