Effortlessly Crafted, Superior Quality, and Mass-Producible Coatings Combining Backscattering and Surface Scattering for Passive Daytime Radiative Cooling

• DOI: 10.1021/acsami.5c00229
• Publication Date: 2025-03-26T20:09:03Z
• Authors: Yuxuan Gu; YueKe Wang; Yiren Cao; Wei Wei; Xiaojie Li; Jingcheng Liu
• Keywords: Slab; Radiative Cooling; Passive cooling

Passive daytime radiative cooling (PDRC) stands out as an eco-friendly, energy-independent solution, which has emerged a field of intense interest and extensive investigation. In this work, low-thickness PDRC coating with average solar reflectance 93.7% long-wave infrared emittance 98.5% was developed by combining the backscattering hollow silica microspheres (HSMs) surface scattering TiO2. A finite element method simulation conducted to verify that HSMs enhance performances. The synergistic interaction between two fillers optimized their performance, leading high work efficiency significant reduction in filler loading. Moreover, demonstrated outstanding performance both indoor outdoor tests. Under summer temperatures exceeding 38.9 °C, wooden house model concrete slab were reduced 5.0 6.3 respectively. featured simple industrial preparation, low cost, ability produce large volumes, thereby providing viable path toward commercial scalability. This offers solution current challenges faced application coatings.