| DOI | 10.1016/j.jobe.2024.108749
|
| Photocatalytic cement-based passive cooling composites: The synergy between radiative cooling and self-cleaning mechanisms |
| Liu, Daoru; Zepper, J. C. O.; Fan, Daiwei; Yu, Qingliang
|
| 发表日期 | 2024
|
| EISSN | 2352-7102
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| 起始页码 | 85
|
| 卷号 | 85 |
| 英文摘要 | Radiative cooling holds promise in combating climate change by reducing energy consumption. However, organic radiative coolers face fabrication complexities, weak environmental reliability, and limited self-cleaning capabilities. To overcome these challenges, we present autoclaved cement pastes, inorganic passive coolers with exceptional energy-free cooling and self-cleaning properties, achieved through a straightforward hydrothermal process. The inorganic cooler incorporating 28 wt% alumina exhibits impressive solar reflectivity (0.91), atmospheric window emissivity (0.91), radiative cooling power (-11.0 W/m(2)), and effective evaporative cooling (>8 h, 25 W/m(2)). The high solar reflectivity is attributed to tailored nano/micro particles and pores inducing strong Mie scattering within the solar spectral range (lambda = 280-2500 nm). The theoretical cooling properties are validated by the outdoor on-site measurements, and the roles of moisture inside the cooler matrix are verified. Additionally, the cooler formulation featuring 14 wt% nanosilica and 14 wt% alumina demonstrates remarkable self-cleaning capabilities, eliminating approximately 68% of surface contaminants within 30 min. This self-cleaning performance stems from the evolution of C-S-H phases, leading to the formation of massive nano C-(A)-S-H honeycombs with nanowires, enhancing mass adsorption and photocatalytic quantum effects at abundant active sites. This study would open new avenues for scalable, energy-free cement-bound cooling materials for building engineering and align with the UN's sustainable development goals. |
| 英文关键词 | Radiative cooling; Self-cleaning; Tobermorite; Hydrogarnet; Boehmite; Atmospheric window |
| 语种 | 英语
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| WOS研究方向 | Construction & Building Technology
; Engineering
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| WOS类目 | Construction & Building Technology
; Engineering, Civil
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| WOS记录号 | WOS:001185677400001
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| 来源期刊 | JOURNAL OF BUILDING ENGINEERING
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| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/297106
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| 作者单位 | Wuhan University; Eindhoven University of Technology; Eindhoven University of Technology
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推荐引用方式
GB/T 7714 |
Liu, Daoru,Zepper, J. C. O.,Fan, Daiwei,et al. Photocatalytic cement-based passive cooling composites: The synergy between radiative cooling and self-cleaning mechanisms[J],2024,85.
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| APA |
Liu, Daoru,Zepper, J. C. O.,Fan, Daiwei,&Yu, Qingliang.(2024).Photocatalytic cement-based passive cooling composites: The synergy between radiative cooling and self-cleaning mechanisms.JOURNAL OF BUILDING ENGINEERING,85.
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| MLA |
Liu, Daoru,et al."Photocatalytic cement-based passive cooling composites: The synergy between radiative cooling and self-cleaning mechanisms".JOURNAL OF BUILDING ENGINEERING 85(2024).
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