Journal
JOURNAL OF MATERIALS RESEARCH
Volume 35, Issue 16, Pages 2126-2137Publisher
SPRINGER HEIDELBERG
DOI: 10.1557/jmr.2020.177
Keywords
core; shell; morphology
Categories
Funding
- National Natural Science Foundation of China [51503084]
- China Postdoctoral Science Foundation [2016M601713]
- Postdoctoral Science Foundation of Jiangsu Province [1601068C]
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To advance the utilization of solar thermal energy, a novel solar-driven microcapsule was designed by the combination of high-performance CuS nanoconverter and the microencapsulated n-Eicosane with a brookite TiO2 shell via in situ sol-gel method. The resultant n-Eicosane@TiO2/CuS microcapsules possessed excellent thermal properties with high latent heat density (171.7 J/g), high encapsulation efficiency (71.7%), and increased thermal conductivity (0.730 W/(m K)). SEM analysis clearly verified that CuS nanoparticles exhibited a uniform distribution on the surfaces. Most of all, the addition of CuS not only enlarged the absorption spectra from the UV to the visible and NIR region but also achieved high solar-to-thermal conversion efficiency (94.41%). Due to the high heat storage capability and solar irradiation utilization efficiency, this solar-driven microcapsule possesses great potential for the solar energy utilization.
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