Enhanced passive radiative cooling coating with Y2O3 for thermal management of building

Luo, Cheng; Zheng, Lin-Xin; Jiao, Jun-Yi; Yan, Weiguo; Zhao, Jun; Jia, Guozhi; Liu, Zhongfan; Liu, Zhibo; Tian, Jianguo

doi:10.1016/j.optmat.2023.113710

Cited by 19 publications

(2 citation statements)

References 42 publications

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“…Since Y 2 O 3 exhibits excellent chemical stability and heat resistance at high temperatures, the exterior coating is expected to maintain high radiative cooling efficiency for an extended period, making it a durable choice. While the Y 2 O 3 used in previous studies is nano-sized [25], we designed raspberry-like hollow particle sizes that had an impact on the optical properties [23]. The structure of these particles was confirmed, and their structure was compared with the intermediate particles generated during the manufacturing process.…”

Section: Introductionmentioning

confidence: 96%

Fabrication of Yttrium Oxide Hollow Films for Efficient Passive Radiative Cooling

Jeon,

Sung,

et al. 2023

Materials

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In recent years, many parts of the world have researched the transition to renewable energy, reducing energy consumption and moving away from fossil fuels. Among the studies to reduce energy consumption, passive radiative cooling can reduce the energy used for building cooling, and to improve this, the optical properties of atmospheric window emissivity and solar reflectance must be increased. In this study, hollow yttrium oxide (H-Y2O3) was fabricated using melamine formaldehyde (MF) as a sacrificial template to improve the optical properties of passive radiative cooling. We then used finite-difference time-domain (FDTD) simulations to predict the optical properties of the fabricated particles. This study compares the properties of MF@Y(OH)CO3 and H-Y2O3 particles derived from the same process. H-Y2O3 was found to have a solar reflectance of 70.73% and an atmospheric window emissivity of 86.24%, and the field tests revealed that the temperature of MF@Y(OH)CO3 was relatively low during the daytime. At night, the temperature of the H-Y2O3 film was found to be 2.6 °C lower than the ambient temperature of 28.8 °C. The optical properties and actual cooling capabilities of the particles at each stage of manufacturing the hollow particles were confirmed and the cooling capabilities were quantified.

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Section: Introductionmentioning

confidence: 96%

Fabrication of Yttrium Oxide Hollow Films for Efficient Passive Radiative Cooling

Jeon,

Sung,

et al. 2023

Materials

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“…However, blending silica with PDMS could result in similar refractive indices because of their similar elemental contents, potentially lowering their solar reflectance. Therefore, Y 2 O 3 was selected as an alternative due to its favorable atmospheric window emissivity and high solar reflectance [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Assembly of Hollow Yttrium Oxide Spheres from Nano-Sized Yttrium Oxide for Advanced Passive Radiative Cooling Materials

Yu,

Kwon,

Jeon

et al. 2024

Polymers

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This study presents significant advancements in passive radiative cooling (PRC), achieved using assembled hollow yttrium oxide spherical particles (AHYOSPs). We developed PRC films with enhanced optical properties by synthesizing micro-sized hollow Y2O3 particles and integrating them into a polydimethylsiloxane (PDMS) matrix. The findings revealed that AHYOSPs achieved a remarkable solar reflectance of 73.72% and an emissivity of 91.75%, significantly outperforming nano-sized yttrium oxide (NYO) and baseline PDMS. Field tests demonstrated that the AHYOSPs maintained their lowest temperature during daylight, confirming their superior cooling efficiency. Additionally, theoretical calculations using MATLAB indicated that the cooling capacity of AHYOSPs reached 103.77 W/m2, representing a substantial improvement over NYO and robustly validating the proposed nanoparticle assembly strategy. These results highlight the potential of structurally controlled particles to revolutionize PRC technologies, thereby offering a path toward more energy-efficient and environmentally friendly cooling solutions.

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Materials in Radiative Cooling Technologies

Liu,

Wang,

Zhou

et al. 2024

Advanced Materials

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Radiative cooling (RC) is a carbon‐neutral cooling technology that utilizes thermal radiation to dissipate heat from the Earth's surface to the cold outer space. Research in the field of RC has garnered increasing interest from both academia and industry due to its potential to drive sustainable economic and environmental benefits to human society by reducing energy consumption and greenhouse gas emissions from conventional cooling systems. Materials innovation is the key to fully exploit the potential of RC. This review aims to elucidate the materials development with a focus on the design strategy including their intrinsic properties, structural formations, and performance improvement. The main types of RC materials, i.e., static‐homogeneous, static‐composite, dynamic, and multifunctional materials, are systematically overviewed. Future trends, possible challenges, and potential solutions are presented with perspectives in the concluding part, aiming to provide a roadmap for the future development of advanced RC materials.This article is protected by copyright. All rights reserved

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Enhanced passive radiative cooling coating with Y2O3 for thermal management of building

Cited by 19 publications

References 42 publications

Fabrication of Yttrium Oxide Hollow Films for Efficient Passive Radiative Cooling

Fabrication of Yttrium Oxide Hollow Films for Efficient Passive Radiative Cooling

Assembly of Hollow Yttrium Oxide Spheres from Nano-Sized Yttrium Oxide for Advanced Passive Radiative Cooling Materials

Materials in Radiative Cooling Technologies

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