Rational Design of Ordered‐Structured Biomass Aerogel for Solar Evaporation

ABSTRACT Solar‐driven interfacial water evaporation represents a green and energy‐efficient technology with immense potential for applications such as seawater desalination. Among various photothermal evaporators, biomass‐derived aerogels stand out as a particularly promising candidate, not only due to their inherent biocompatibility, biodegradability, and renewability but also the highly advantageous three‐dimensional porous structures they form. The controlled design of ordered architectures in these aerogels offers an ideal platform for facilitating efficient water transport, enhancing light absorption, and enabling rapid vapor escape. Nevertheless, a systematic review that comprehensively outlines the strategies and recent advances in the ordered structural regulation of biomass aerogels for solar evaporation remains lacking. To address this gap, this review begins by systematically introducing the bio‐based materials used in aerogel fabrication, highlighting the distinctive benefits of biomass in the design of solar evaporators. It then categorizes the types of photothermal materials compatible with aerogel‐based evaporators from the perspective of photothermal conversion mechanisms. Furthermore, the review elaborates on the design principles for constructing biomass aerogels with ordered structures, with a dedicated focus on structural optimization strategies. Additionally, it provides a comprehensive overview of the latest advances in biomass aerogel evaporators for solar‐driven seawater desalination—an emerging and high‐impact application. By integrating fundamental insights with cutting‐edge developments, this work aims to offer both theoretical reference and practical guidance for researchers, thereby accelerating the development and real‐world application of high‐performance biomass solar evaporators in sustainable energy technologies.