A photoluminescent hydrogen-bonded biomass aerogel for sustainable radiative cooling

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-07-04 DOI:10.1126/science.adn5694

Jian-Wen Ma, Fu-Rong Zeng, Xin-Cen Lin, Yan-Qin Wang, Yi-Heng Ma, Xu-Xu Jia, Jin-Cheng Zhang, Bo-Wen Liu, Yu-Zhong Wang, Hai-Bo Zhao

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Abstract

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°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.

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用于可持续辐射冷却的光致发光氢键生物质气凝胶。

在全球气候变化不断升级的情况下，被动辐射制冷是一种潜在的可持续热管理策略。然而，石油化工冷却材料由于对阳光的吸收，往往面临效率方面的挑战。我们提出了一种本征光致发光生物质气凝胶，其可见光反射率超过 100%，可产生巨大的冷却效果。我们发现，通过荧光和磷光，DNA 和明胶聚集成的有序层状气凝胶在可见光区域的太阳加权反射率达到 104.0%。在太阳辐照度较高的情况下，冷却效果可使环境温度降低 16.0°C。此外，这种气凝胶通过水焊接技术实现了规模化高效生产，具有很高的可修复性、可回收性和可生物降解性，从而完成了一个具有环保意识的生命周期。这种生物质光致发光材料是设计下一代可持续冷却材料的又一工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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