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.

为了促进太阳能的利用，通过高性能CuS纳米转换器和微囊化的正二十烷与板钛矿TiO 2壳的原位溶胶-凝胶法相结合，设计了一种新型的太阳能驱动微囊。生成的正二十烷@TiO 2/ CuS微胶囊具有出色的热性能，具有高的潜热密度（171.7 J / g），高的封装效率（71.7％）和更高的导热率（0.730 W /（m K））。SEM分析清楚地证明了CuS纳米颗粒在表面上显示出均匀的分布。最重要的是，添加CuS不仅扩大了从紫外线到可见光和近红外区域的吸收光谱，而且还实现了很高的太阳热转换效率（94.41％）。由于其高的蓄热能力和太阳辐射的利用效率，这种太阳能驱动的微胶囊具有巨大的太阳能利用潜力。