Díaz-Lobo Alba, Martin-Gonzalez Marisol, Song Qimeng, Morales-Sabio Ángel, Retsch Markus, Manzano Cristina V
Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM + CSIC), Isaac Newton, 8, E-28706 Tres Cantos, Madrid, Spain.
Department of Chemistry, Physical Chemistry I, University of Bayreuth, 95447 Bayreuth, Germany.
ACS Appl Eng Mater. 2024 Jul 29;2(8):2069-2079. doi: 10.1021/acsaenm.4c00245. eCollection 2024 Aug 23.
Passive daytime radiative cooling (PDRC) has emerged as a promising strategy to mitigate the increasing impact of heat waves. However, achieving effective PDRCs requires cost-effective, ecofriendly, and industrially scalable materials. In this study, we investigate the potential of anodic aluminum oxide (AAO) nanostructures coated with metals as passive radiative coolers. We explore the effects of different metallic coatings (Al and Au) with varying thicknesses (ranging from 20 to 100 nm) on the cooling performance of the AAO nanostructures. Our finding reveals a maximum temperature reduction (Δ) of 12.5 °C for 60 nm of Au coating. Furthermore, we demonstrate the dependence of the cooling performance on ambient temperature, emphasizing the practical benefits of these enhanced AAO-based radiative coolers for real-world applications. Notably, our results surpass previous works, offering an avenue to enhance the PDRC capability.
被动日间辐射冷却（PDRC）已成为一种有前景的策略，以减轻热浪日益增加的影响。然而，要实现有效的被动日间辐射冷却，需要具有成本效益、生态友好且可工业规模化的材料。在本研究中，我们研究了涂覆金属的阳极氧化铝（AAO）纳米结构作为被动辐射冷却器的潜力。我们探讨了不同金属涂层（铝和金）以及不同厚度（20至100纳米）对AAO纳米结构冷却性能的影响。我们的研究结果表明，60纳米厚的金涂层可实现最大降温12.5℃。此外，我们证明了冷却性能对环境温度的依赖性，强调了这些增强型基于AAO的辐射冷却器在实际应用中的实际益处。值得注意的是，我们的结果超越了以往的研究，为提高被动日间辐射冷却能力提供了一条途径。
