Surface‐Carbonized Bamboos with Multilevel Functional Biostructures Deliver High Photothermal Water Evaporation Performance

• DOI: 10.1002/adsu.202000126
• Publication Date: 2020-07-23T08:53:12Z
• Authors: Jie Liu; Jiahao Yao; Yang Yuan; Qinglei Liu; Wang Zhang; Xiaohui Zhang; Jiajun Gu
• Keywords: Photothermal effect

Abstract Interfacial solar steam generation (ISSG) has attracted global attention as an important approach for water purification and desalination. The related photothermal materials based on 3D biostructures are promising due to their abundance easy accessibility. Here, it is shown that surface‐carbonized bamboo (SC‐bamboo) a material exhibits outstanding ISSG performance its multilevel functional biostructures. On microscopic scale, the bamboo's air‐filled parenchyma cells promote thermal insulation while vascular bundles ensure rapid transport. macroscopic unique concave structure at nodes concentrates heat in confined region hollow chambers internodes also insulation. These structures of SC‐bamboo result solar‐thermal conversion efficiency up 93.63% ± 1.57% under 1 kW m −2 irradiation, surpassing most biomass‐derived ever reported. Considering low cost convenience, this work sheds light design fabrication readily accessible, efficient photothermal‐conversion devices.