A photoluminescent hydrogen-bonded biomass aerogel for sustainable radiative cooling

Author:

Ma Jian-Wen1ORCID,Zeng Fu-Rong1ORCID,Lin Xin-Cen1,Wang Yan-Qin1,Ma Yi-Heng1,Jia Xu-Xu1,Zhang Jin-Cheng1,Liu Bo-Wen1ORCID,Wang Yu-Zhong1,Zhao Hai-Bo1ORCID

Affiliation:

1. Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu 610064, P.R. China.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Sub−1 nm Nanowire Aerogels;Advanced Functional Materials;2024-09-02

2. The cool technologies that could protect cities from dangerous heat;Nature;2024-08-27

3. A biomass-derived material for passive radiative cooling;Nature Reviews Materials;2024-07-24

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