A photoluminescent hydrogen-bonded biomass aerogel for sustainable radiative cooling

• 成果类型: Article
• 署名作者: Ma, Jian-Wen; Zeng, Fu-Rong; Lin, Xin-Cen; Wang, Yan-Qin; Ma, Yi-Heng; Jia, Xu-Xu; Zhang, Jin-Cheng; Liu, Bo-Wen; Wang, Yu-Zhong; Zhao, Hai-Bo
• 署名单位: Sichuan University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12217
• DOI: 10.1126/science.adn5694
• 发表日期: 2024-07-05
• 页码: 68-74
• 关键词: photonic structures; basis-sets

摘要

Passive radiant cooling is a potentially sustainable thermal management strategy amid escalating global climate change. However, petrochemical-derived cooling materials often face efficiency challenges owing to the absorption of sunlight. We present an intrinsic photoluminescent biomass aerogel, which has a visible light reflectance exceeding 100%, that yields a large cooling effect. We discovered that DNA and gelatin aggregation into an ordered layered aerogel achieves a solar-weighted reflectance of 104.0% in visible light regions through fluorescence and phosphorescence. The cooling effect can reduce ambient temperatures by 16.0 degrees C under high solar irradiance. In addition, the aerogel, efficiently produced at scale through water-welding, displays high reparability, recyclability, and biodegradability, completing an environmentally conscious life cycle. This biomass photoluminescence material is another tool for designing next-generation sustainable cooling materials.