ArticleMaterials (Basel, Switzerland)2026
Waste Glass-Derived Hierarchically Porous All-Inorganic Coatings for Sustainable Daytime Radiative Cooling.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Passive daytime radiative cooling (PDRC) is a promising thermal management technology, yet its widespread application is hindered by the high production costs and poor durability of traditional organic-based materials. Here, we presented a hierarchically porous, all-inorganic PDRC coating synthesized from industrial waste glass and alumina microparticles via low-temperature (600 °C) processing. Rather than serving merely as a cheap substitute, the alkali oxides inherent in waste glass act as natural fluxes, enabling partial melting. Concurrently, the steric hindrance of alumina restricts full densification, spontaneously constructing a highly scattering random photonic network. The optimized composite (50 wt.% waste glass/50 wt.% alumina) achieves 96% solar reflectance and 95% atmospheric window emittance. Field tests confirmed sub-ambient cooling of ~4.0 °C (day) and ~4.5 °C (night), yielding a peak net cooling power of 108.1 W/m
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