To improve the solar-thermal conversion efficiency of encapsulated phase change materials (PCM), a novel hierarchical SiO₂/TiO₂/polydopamine (ES-T-PDA) composite shell was designed and synthesized through interlayer arrangement on an encapsulated PCM. The corresponding structures, chemical compositions, crystallinity, and thermal induction capacity of the ES-T-PDA nano/microcapsule shell was extensively investigated. The articulated system attained phase-change enthalpies around 125.92 J/g, with a thermal heating increase of ~2.16 ± 0.34 °C due to stimulated light-driven localized heating for efficient solar energy storage. This study confirmed that the combination of SiO₂, TiO₂ and PDA layered shell was a practical way not only to enhance the structural stability, durability and solar photocatalytic activity but also to promote localized surface photothermal effect due to light scattering effect and visible light absorption. By coupling these two features, the structural design developed in this work displays a considerable prospect for straightforward solar energy employment in various PCM solar-thermal conversion applications such as temperature management of greenhouses, solar water heating systems, solar cookers, and solar-thermal electricity generating systems.

为了提高包封相变材料的光热转换效率，设计了一种新型的SiO ₂ / TiO ₂ /聚多巴胺分层结构（ES-T-PDA）复合壳，并通过在包封PCM上的层间排列来合成。广泛研究了ES-T-PDA纳米/微胶囊壳的相应结构，化学组成，结晶度和热感应能力。铰接系统达到相变焓约125.92 J / g，由于受激光驱动的局部加热用于有效的太阳能存储，因此热加热增加〜2.16±0.34°C。这项研究证实了SiO ₂，TiO _2的结合PDA层状壳不仅是提高结构稳定性，耐久性和太阳光催化活性的一种实用方法，而且由于光散射作用和可见光吸收作用，可以促进局部表面光热作用。通过结合这两个功能，这项工作中开发的结构设计显示了在各种PCM太阳热能转换应用中直接使用太阳能的巨大前景，例如温室的温度管理，太阳能热水系统，太阳能炊具和太阳能热电发电系统。